WebUI: prefer arrow functions whenever applicable

Compared to plain function, arrow function is simpler to understand (without bindings to `this`, `arguments`, `super`) and to read.
Now, plain function will only be used when this object is required.

PR #21691.

src/webui/www/private/scripts/client.js

@@ -44,18 +44,18 @@ window.qBittorrent.Client ??= (() => {
         };
     };
 
-    const closeWindow = function(windowID) {
+    const closeWindow = (windowID) => {
         const window = document.getElementById(windowID);
         if (!window)
             return;
         MochaUI.closeWindow(window);
     };
 
-    const closeWindows = function() {
+    const closeWindows = () => {
         MochaUI.closeAll();
     };
 
-    const getSyncMainDataInterval = function() {
+    const getSyncMainDataInterval = () => {
         return customSyncMainDataInterval ? customSyncMainDataInterval : serverSyncMainDataInterval;
     };
 
@@ -81,22 +81,22 @@ window.qBittorrent.Client ??= (() => {
     let showingRssReader = false;
     let showingLogViewer = false;
 
-    const showSearchEngine = function(bool) {
+    const showSearchEngine = (bool) => {
         showingSearchEngine = bool;
     };
-    const showRssReader = function(bool) {
+    const showRssReader = (bool) => {
         showingRssReader = bool;
     };
-    const showLogViewer = function(bool) {
+    const showLogViewer = (bool) => {
         showingLogViewer = bool;
     };
-    const isShowSearchEngine = function() {
+    const isShowSearchEngine = () => {
         return showingSearchEngine;
     };
-    const isShowRssReader = function() {
+    const isShowRssReader = () => {
         return showingRssReader;
     };
-    const isShowLogViewer = function() {
+    const isShowLogViewer = () => {
         return showingLogViewer;
     };
 
@@ -108,9 +108,9 @@ Object.freeze(window.qBittorrent.Client);
 
 this.torrentsTable = new window.qBittorrent.DynamicTable.TorrentsTable();
 
-let updatePropertiesPanel = function() {};
+let updatePropertiesPanel = () => {};
 
-this.updateMainData = function() {};
+this.updateMainData = () => {};
 let alternativeSpeedLimits = false;
 let queueing_enabled = true;
 let serverSyncMainDataInterval = 1500;
@@ -126,7 +126,7 @@ const CATEGORIES_UNCATEGORIZED = 2;
 const category_list = new Map();
 
 let selectedCategory = Number(LocalPreferences.get("selected_category", CATEGORIES_ALL));
-let setCategoryFilter = function() {};
+let setCategoryFilter = () => {};
 
 /* Tags filter */
 const TAGS_ALL = 1;
@@ -135,7 +135,7 @@ const TAGS_UNTAGGED = 2;
 const tagList = new Map();
 
 let selectedTag = Number(LocalPreferences.get("selected_tag", TAGS_ALL));
-let setTagFilter = function() {};
+let setTagFilter = () => {};
 
 /* Trackers filter */
 const TRACKERS_ALL = 1;
@@ -145,19 +145,19 @@ const TRACKERS_TRACKERLESS = 2;
 const trackerList = new Map();
 
 let selectedTracker = Number(LocalPreferences.get("selected_tracker", TRACKERS_ALL));
-let setTrackerFilter = function() {};
+let setTrackerFilter = () => {};
 
 /* All filters */
 let selectedStatus = LocalPreferences.get("selected_filter", "all");
-let setStatusFilter = function() {};
-let toggleFilterDisplay = function() {};
+let setStatusFilter = () => {};
+let toggleFilterDisplay = () => {};
 
 window.addEventListener("DOMContentLoaded", () => {
     let isSearchPanelLoaded = false;
     let isLogPanelLoaded = false;
     let isRssPanelLoaded = false;
 
-    const saveColumnSizes = function() {
+    const saveColumnSizes = () => {
         const filters_width = $("Filters").getSize().x;
         LocalPreferences.set("filters_width", filters_width);
         const properties_height_rel = $("propertiesPanel").getSize().y / Window.getSize().y;
@@ -175,7 +175,7 @@ window.addEventListener("DOMContentLoaded", () => {
     MochaUI.Desktop.desktop.style.visibility = "visible"; */
     MochaUI.Desktop.initialize();
 
-    const buildTransfersTab = function() {
+    const buildTransfersTab = () => {
         new MochaUI.Column({
             id: "filtersColumn",
             placement: "left",
@@ -191,7 +191,7 @@ window.addEventListener("DOMContentLoaded", () => {
         });
     };
 
-    const buildSearchTab = function() {
+    const buildSearchTab = () => {
         new MochaUI.Column({
             id: "searchTabColumn",
             placement: "main",
@@ -202,7 +202,7 @@ window.addEventListener("DOMContentLoaded", () => {
         $("searchTabColumn").addClass("invisible");
     };
 
-    const buildRssTab = function() {
+    const buildRssTab = () => {
         new MochaUI.Column({
             id: "rssTabColumn",
             placement: "main",
@@ -213,7 +213,7 @@ window.addEventListener("DOMContentLoaded", () => {
         $("rssTabColumn").addClass("invisible");
     };
 
-    const buildLogTab = function() {
+    const buildLogTab = () => {
         new MochaUI.Column({
             id: "logTabColumn",
             placement: "main",
@@ -230,7 +230,7 @@ window.addEventListener("DOMContentLoaded", () => {
     buildLogTab();
     MochaUI.initializeTabs("mainWindowTabsList");
 
-    const handleFilterSelectionChange = function(prevSelectedTorrent, currSelectedTorrent) {
+    const handleFilterSelectionChange = (prevSelectedTorrent, currSelectedTorrent) => {
         // clear properties panels when filter changes (e.g. selected torrent is no longer visible)
         if (prevSelectedTorrent !== currSelectedTorrent) {
             window.qBittorrent.PropGeneral.clear();
@@ -241,7 +241,7 @@ window.addEventListener("DOMContentLoaded", () => {
         }
     };
 
-    setStatusFilter = function(name) {
+    setStatusFilter = (name) => {
         const currentHash = torrentsTable.getCurrentTorrentID();
 
         LocalPreferences.set("selected_filter", name);
@@ -253,7 +253,7 @@ window.addEventListener("DOMContentLoaded", () => {
         handleFilterSelectionChange(currentHash, newHash);
     };
 
-    setCategoryFilter = function(hash) {
+    setCategoryFilter = (hash) => {
         const currentHash = torrentsTable.getCurrentTorrentID();
 
         LocalPreferences.set("selected_category", hash);
@@ -265,7 +265,7 @@ window.addEventListener("DOMContentLoaded", () => {
         handleFilterSelectionChange(currentHash, newHash);
     };
 
-    setTagFilter = function(hash) {
+    setTagFilter = (hash) => {
         const currentHash = torrentsTable.getCurrentTorrentID();
 
         LocalPreferences.set("selected_tag", hash);
@@ -277,7 +277,7 @@ window.addEventListener("DOMContentLoaded", () => {
         handleFilterSelectionChange(currentHash, newHash);
     };
 
-    setTrackerFilter = function(hash) {
+    setTrackerFilter = (hash) => {
         const currentHash = torrentsTable.getCurrentTorrentID();
 
         LocalPreferences.set("selected_tracker", hash);
@@ -289,7 +289,7 @@ window.addEventListener("DOMContentLoaded", () => {
         handleFilterSelectionChange(currentHash, newHash);
     };
 
-    toggleFilterDisplay = function(filterListID) {
+    toggleFilterDisplay = (filterListID) => {
         const filterList = document.getElementById(filterListID);
         const filterTitle = filterList.previousElementSibling;
         const toggleIcon = filterTitle.firstElementChild;
@@ -309,7 +309,7 @@ window.addEventListener("DOMContentLoaded", () => {
         },
         loadMethod: "xhr",
         contentURL: "views/filters.html",
-        onContentLoaded: function() {
+        onContentLoaded: () => {
             highlightSelectedStatus();
         },
         column: "filtersColumn",
@@ -354,7 +354,7 @@ window.addEventListener("DOMContentLoaded", () => {
     let syncMainDataLastResponseId = 0;
     const serverState = {};
 
-    const removeTorrentFromCategoryList = function(hash) {
+    const removeTorrentFromCategoryList = (hash) => {
         if (!hash)
             return false;
 
@@ -367,7 +367,7 @@ window.addEventListener("DOMContentLoaded", () => {
         return removed;
     };
 
-    const addTorrentToCategoryList = function(torrent) {
+    const addTorrentToCategoryList = (torrent) => {
         const category = torrent["category"];
         if (typeof category === "undefined")
             return false;
@@ -395,7 +395,7 @@ window.addEventListener("DOMContentLoaded", () => {
         return false;
     };
 
-    const removeTorrentFromTagList = function(hash) {
+    const removeTorrentFromTagList = (hash) => {
         if (!hash)
             return false;
 
@@ -408,7 +408,7 @@ window.addEventListener("DOMContentLoaded", () => {
         return removed;
     };
 
-    const addTorrentToTagList = function(torrent) {
+    const addTorrentToTagList = (torrent) => {
         if (torrent["tags"] === undefined) // Tags haven't changed
             return false;
 
@@ -438,7 +438,7 @@ window.addEventListener("DOMContentLoaded", () => {
         return added;
     };
 
-    const updateFilter = function(filter, filterTitle) {
+    const updateFilter = (filter, filterTitle) => {
         const filterEl = document.getElementById(`${filter}_filter`);
         const filterTorrentCount = torrentsTable.getFilteredTorrentsNumber(filter, CATEGORIES_ALL, TAGS_ALL, TRACKERS_ALL);
         if (useAutoHideZeroStatusFilters) {
@@ -449,7 +449,7 @@ window.addEventListener("DOMContentLoaded", () => {
         filterEl.firstElementChild.lastChild.nodeValue = filterTitle.replace("%1", filterTorrentCount);
     };
 
-    const updateFiltersList = function() {
+    const updateFiltersList = () => {
         updateFilter("all", "QBT_TR(All (%1))QBT_TR[CONTEXT=StatusFilterWidget]");
         updateFilter("downloading", "QBT_TR(Downloading (%1))QBT_TR[CONTEXT=StatusFilterWidget]");
         updateFilter("seeding", "QBT_TR(Seeding (%1))QBT_TR[CONTEXT=StatusFilterWidget]");
@@ -466,14 +466,14 @@ window.addEventListener("DOMContentLoaded", () => {
         updateFilter("errored", "QBT_TR(Errored (%1))QBT_TR[CONTEXT=StatusFilterWidget]");
     };
 
-    const highlightSelectedStatus = function() {
+    const highlightSelectedStatus = () => {
         const statusFilter = document.getElementById("statusFilterList");
         const filterID = `${selectedStatus}_filter`;
         for (const status of statusFilter.children)
             status.classList.toggle("selectedFilter", (status.id === filterID));
     };
 
-    const updateCategoryList = function() {
+    const updateCategoryList = () => {
         const categoryList = document.getElementById("categoryFilterList");
         if (!categoryList)
             return;
@@ -583,7 +583,7 @@ window.addEventListener("DOMContentLoaded", () => {
         window.qBittorrent.Filters.categoriesFilterContextMenu.searchAndAddTargets();
     };
 
-    const highlightSelectedCategory = function() {
+    const highlightSelectedCategory = () => {
         const categoryList = document.getElementById("categoryFilterList");
         if (!categoryList)
             return;
@@ -592,7 +592,7 @@ window.addEventListener("DOMContentLoaded", () => {
             category.classList.toggle("selectedFilter", (Number(category.id) === selectedCategory));
     };
 
-    const updateTagList = function() {
+    const updateTagList = () => {
         const tagFilterList = $("tagFilterList");
         if (tagFilterList === null)
             return;
@@ -601,7 +601,7 @@ window.addEventListener("DOMContentLoaded", () => {
 
         const tagItemTemplate = document.getElementById("tagFilterItem");
 
-        const createLink = function(hash, text, count) {
+        const createLink = (hash, text, count) => {
             const tagFilterItem = tagItemTemplate.content.cloneNode(true).firstElementChild;
             tagFilterItem.id = hash;
             tagFilterItem.classList.toggle("selectedFilter", hash === selectedTag);
@@ -635,7 +635,7 @@ window.addEventListener("DOMContentLoaded", () => {
         window.qBittorrent.Filters.tagsFilterContextMenu.searchAndAddTargets();
     };
 
-    const highlightSelectedTag = function() {
+    const highlightSelectedTag = () => {
         const tagFilterList = document.getElementById("tagFilterList");
         if (!tagFilterList)
             return;
@@ -644,7 +644,7 @@ window.addEventListener("DOMContentLoaded", () => {
             tag.classList.toggle("selectedFilter", (Number(tag.id) === selectedTag));
     };
 
-    const updateTrackerList = function() {
+    const updateTrackerList = () => {
         const trackerFilterList = $("trackerFilterList");
         if (trackerFilterList === null)
             return;
@@ -653,7 +653,7 @@ window.addEventListener("DOMContentLoaded", () => {
 
         const trackerItemTemplate = document.getElementById("trackerFilterItem");
 
-        const createLink = function(hash, text, count) {
+        const createLink = (hash, text, count) => {
             const trackerFilterItem = trackerItemTemplate.content.cloneNode(true).firstElementChild;
             trackerFilterItem.id = hash;
             trackerFilterItem.classList.toggle("selectedFilter", hash === selectedTracker);
@@ -695,7 +695,7 @@ window.addEventListener("DOMContentLoaded", () => {
         window.qBittorrent.Filters.trackersFilterContextMenu.searchAndAddTargets();
     };
 
-    const highlightSelectedTracker = function() {
+    const highlightSelectedTracker = () => {
         const trackerFilterList = document.getElementById("trackerFilterList");
         if (!trackerFilterList)
             return;
@@ -728,21 +728,21 @@ window.addEventListener("DOMContentLoaded", () => {
 
     let syncMainDataTimeoutID = -1;
     let syncRequestInProgress = false;
-    const syncMainData = function() {
+    const syncMainData = () => {
         const url = new URI("api/v2/sync/maindata");
         url.setData("rid", syncMainDataLastResponseId);
         const request = new Request.JSON({
             url: url,
             noCache: true,
             method: "get",
-            onFailure: function() {
+            onFailure: () => {
                 const errorDiv = $("error_div");
                 if (errorDiv)
                     errorDiv.textContent = "QBT_TR(qBittorrent client is not reachable)QBT_TR[CONTEXT=HttpServer]";
                 syncRequestInProgress = false;
                 syncData(2000);
             },
-            onSuccess: function(response) {
+            onSuccess: (response) => {
                 $("error_div").textContent = "";
                 if (response) {
                     clearTimeout(torrentsFilterInputTimer);
@@ -909,12 +909,12 @@ window.addEventListener("DOMContentLoaded", () => {
         request.send();
     };
 
-    updateMainData = function() {
+    updateMainData = () => {
         torrentsTable.updateTable();
         syncData(100);
     };
 
-    const syncData = function(delay) {
+    const syncData = (delay) => {
         if (syncRequestInProgress)
             return;
 
@@ -927,7 +927,7 @@ window.addEventListener("DOMContentLoaded", () => {
         syncMainDataTimeoutID = syncMainData.delay(delay);
     };
 
-    const processServerState = function() {
+    const processServerState = () => {
         let transfer_info = window.qBittorrent.Misc.friendlyUnit(serverState.dl_info_speed, true);
         if (serverState.dl_rate_limit > 0)
             transfer_info += " [" + window.qBittorrent.Misc.friendlyUnit(serverState.dl_rate_limit, true) + "]";
@@ -1028,7 +1028,7 @@ window.addEventListener("DOMContentLoaded", () => {
         serverSyncMainDataInterval = Math.max(serverState.refresh_interval, 500);
     };
 
-    const updateAltSpeedIcon = function(enabled) {
+    const updateAltSpeedIcon = (enabled) => {
         if (enabled) {
             $("alternativeSpeedLimits").src = "images/slow.svg";
             $("alternativeSpeedLimits").alt = "QBT_TR(Alternative speed limits: On)QBT_TR[CONTEXT=MainWindow]";
@@ -1048,11 +1048,11 @@ window.addEventListener("DOMContentLoaded", () => {
         new Request({
             url: "api/v2/transfer/toggleSpeedLimitsMode",
             method: "post",
-            onComplete: function() {
+            onComplete: () => {
                 alternativeSpeedLimits = !alternativeSpeedLimits;
                 updateMainData();
             },
-            onFailure: function() {
+            onFailure: () => {
                 // Restore icon in case of failure
                 updateAltSpeedIcon(alternativeSpeedLimits);
             }
@@ -1090,7 +1090,7 @@ window.addEventListener("DOMContentLoaded", () => {
         MochaUI.Desktop.setDesktopSize();
     });
 
-    const registerMagnetHandler = function() {
+    const registerMagnetHandler = () => {
         if (typeof navigator.registerProtocolHandler !== "function") {
             if (window.location.protocol !== "https:")
                 alert("QBT_TR(To use this feature, the WebUI needs to be accessed over HTTPS)QBT_TR[CONTEXT=MainWindow]");
@@ -1158,7 +1158,7 @@ window.addEventListener("DOMContentLoaded", () => {
         updateTabDisplay();
     });
 
-    const updateTabDisplay = function() {
+    const updateTabDisplay = () => {
         if (window.qBittorrent.Client.isShowRssReader()) {
             $("showRssReaderLink").firstChild.style.opacity = "1";
             $("mainWindowTabs").removeClass("invisible");
@@ -1210,7 +1210,7 @@ window.addEventListener("DOMContentLoaded", () => {
 
     // main window tabs
 
-    const showTransfersTab = function() {
+    const showTransfersTab = () => {
         const showFiltersSidebar = LocalPreferences.get("show_filters_sidebar", "true") === "true";
         if (showFiltersSidebar) {
             $("filtersColumn").removeClass("invisible");
@@ -1229,7 +1229,7 @@ window.addEventListener("DOMContentLoaded", () => {
         LocalPreferences.set("selected_window_tab", "transfers");
     };
 
-    const hideTransfersTab = function() {
+    const hideTransfersTab = () => {
         $("filtersColumn").addClass("invisible");
         $("filtersColumn_handle").addClass("invisible");
         $("mainColumn").addClass("invisible");
@@ -1237,7 +1237,7 @@ window.addEventListener("DOMContentLoaded", () => {
         MochaUI.Desktop.resizePanels();
     };
 
-    const showSearchTab = (function() {
+    const showSearchTab = (() => {
         let searchTabInitialized = false;
 
         return () => {
@@ -1266,12 +1266,12 @@ window.addEventListener("DOMContentLoaded", () => {
         };
     })();
 
-    const hideSearchTab = function() {
+    const hideSearchTab = () => {
         $("searchTabColumn").addClass("invisible");
         MochaUI.Desktop.resizePanels();
     };
 
-    const showRssTab = (function() {
+    const showRssTab = (() => {
         let rssTabInitialized = false;
 
         return () => {
@@ -1303,13 +1303,13 @@ window.addEventListener("DOMContentLoaded", () => {
         };
     })();
 
-    const hideRssTab = function() {
+    const hideRssTab = () => {
         $("rssTabColumn").addClass("invisible");
         window.qBittorrent.Rss && window.qBittorrent.Rss.unload();
         MochaUI.Desktop.resizePanels();
     };
 
-    const showLogTab = (function() {
+    const showLogTab = (() => {
         let logTabInitialized = false;
 
         return () => {
@@ -1341,13 +1341,13 @@ window.addEventListener("DOMContentLoaded", () => {
         };
     })();
 
-    const hideLogTab = function() {
+    const hideLogTab = () => {
         $("logTabColumn").addClass("invisible");
         MochaUI.Desktop.resizePanels();
         window.qBittorrent.Log && window.qBittorrent.Log.unload();
     };
 
-    const addSearchPanel = function() {
+    const addSearchPanel = () => {
         new MochaUI.Panel({
             id: "SearchPanel",
             title: "Search",
@@ -1372,7 +1372,7 @@ window.addEventListener("DOMContentLoaded", () => {
         });
     };
 
-    const addRssPanel = function() {
+    const addRssPanel = () => {
         new MochaUI.Panel({
             id: "RssPanel",
             title: "Rss",
@@ -1394,7 +1394,7 @@ window.addEventListener("DOMContentLoaded", () => {
         });
     };
 
-    const addLogPanel = function() {
+    const addLogPanel = () => {
         new MochaUI.Panel({
             id: "LogPanel",
             title: "Log",
@@ -1415,7 +1415,7 @@ window.addEventListener("DOMContentLoaded", () => {
                 },
             },
             tabsURL: "views/logTabs.html",
-            tabsOnload: function() {
+            tabsOnload: () => {
                 MochaUI.initializeTabs("panelTabs");
 
                 $("logMessageLink").addEventListener("click", (e) => {
@@ -1433,7 +1433,7 @@ window.addEventListener("DOMContentLoaded", () => {
         });
     };
 
-    const handleDownloadParam = function() {
+    const handleDownloadParam = () => {
         // Extract torrent URL from download param in WebUI URL hash
         const downloadHash = "#download=";
         if (location.hash.indexOf(downloadHash) !== 0)
@@ -1457,7 +1457,7 @@ window.addEventListener("DOMContentLoaded", () => {
         },
         loadMethod: "xhr",
         contentURL: "views/transferlist.html",
-        onContentLoaded: function() {
+        onContentLoaded: () => {
             handleDownloadParam();
             updateMainData();
         },
@@ -1484,8 +1484,8 @@ window.addEventListener("DOMContentLoaded", () => {
         contentURL: "views/properties.html",
         require: {
             js: ["scripts/prop-general.js", "scripts/prop-trackers.js", "scripts/prop-peers.js", "scripts/prop-webseeds.js", "scripts/prop-files.js"],
-            onload: function() {
-                updatePropertiesPanel = function() {
+            onload: () => {
+                updatePropertiesPanel = () => {
                     switch (LocalPreferences.get("selected_properties_tab")) {
                         case "propGeneralLink":
                             window.qBittorrent.PropGeneral.updateData();
@@ -1507,7 +1507,7 @@ window.addEventListener("DOMContentLoaded", () => {
             }
         },
         tabsURL: "views/propertiesToolbar.html",
-        tabsOnload: function() {}, // must be included, otherwise panel won't load properly
+        tabsOnload: () => {}, // must be included, otherwise panel won't load properly
         onContentLoaded: function() {
             this.panelHeaderCollapseBoxEl.classList.add("invisible");
 
@@ -1703,7 +1703,7 @@ window.addEventListener("DOMContentLoaded", () => {
     }).activate();
 
     new ClipboardJS(".copyToClipboard", {
-        text: function(trigger) {
+        text: (trigger) => {
             switch (trigger.id) {
                 case "copyName":
                     return copyNameFN();

src/webui/www/private/scripts/contextmenu.js

@@ -642,7 +642,7 @@ window.qBittorrent.ContextMenu ??= (() => {
 
     class SearchPluginsTableContextMenu extends ContextMenu {
         updateMenuItems() {
-            const enabledColumnIndex = function(text) {
+            const enabledColumnIndex = (text) => {
                 const columns = $("searchPluginsTableFixedHeaderRow").getChildren("th");
                 for (let i = 0; i < columns.length; ++i) {
                     if (columns[i].textContent === "Enabled")

src/webui/www/private/scripts/download.js

@@ -35,12 +35,12 @@ window.qBittorrent.Download ??= (() => {
     let categories = {};
     let defaultSavePath = "";
 
-    const getCategories = function() {
+    const getCategories = () => {
         new Request.JSON({
             url: "api/v2/torrents/categories",
             method: "get",
             noCache: true,
-            onSuccess: function(data) {
+            onSuccess: (data) => {
                 if (data) {
                     categories = data;
                     for (const i in data) {
@@ -58,7 +58,7 @@ window.qBittorrent.Download ??= (() => {
         }).send();
     };
 
-    const getPreferences = function() {
+    const getPreferences = () => {
         const pref = window.parent.qBittorrent.Cache.preferences.get();
 
         defaultSavePath = pref.save_path;
@@ -89,7 +89,7 @@ window.qBittorrent.Download ??= (() => {
             $("contentLayout").selectedIndex = 0;
     };
 
-    const changeCategorySelect = function(item) {
+    const changeCategorySelect = (item) => {
         if (item.value === "\\other") {
             item.nextElementSibling.hidden = false;
             item.nextElementSibling.value = "";
@@ -114,7 +114,7 @@ window.qBittorrent.Download ??= (() => {
         }
     };
 
-    const changeTMM = function(item) {
+    const changeTMM = (item) => {
         if (item.selectedIndex === 1) {
             $("savepath").disabled = true;
 

src/webui/www/private/scripts/dynamicTable.js

@@ -68,7 +68,7 @@ window.qBittorrent.DynamicTable ??= (() => {
 
     const DynamicTable = new Class({
 
-        initialize: function() {},
+        initialize: () => {},
 
         setup: function(dynamicTableDivId, dynamicTableFixedHeaderDivId, contextMenu) {
             this.dynamicTableDivId = dynamicTableDivId;
@@ -133,7 +133,7 @@ window.qBittorrent.DynamicTable ??= (() => {
             this.currentHeaderAction = "";
             this.canResize = false;
 
-            const resetElementBorderStyle = function(el, side) {
+            const resetElementBorderStyle = (el, side) => {
                 if ((side === "left") || (side !== "right"))
                     el.style.borderLeft = "";
                 if ((side === "right") || (side !== "left"))
@@ -197,9 +197,9 @@ window.qBittorrent.DynamicTable ??= (() => {
                 this.lastClientX = e.clientX;
             }.bind(this);
 
-            const mouseOutFn = function(e) {
+            const mouseOutFn = (e) => {
                 resetElementBorderStyle(e.target);
-            }.bind(this);
+            };
 
             const onBeforeStart = function(el) {
                 this.clickedTh = el;
@@ -392,7 +392,7 @@ window.qBittorrent.DynamicTable ??= (() => {
                 class: "contextMenu scrollableMenu"
             });
 
-            const createLi = function(columnName, text) {
+            const createLi = (columnName, text) => {
                 const anchor = document.createElement("a");
                 anchor.href = `#${columnName}`;
                 anchor.textContent = text;
@@ -436,7 +436,7 @@ window.qBittorrent.DynamicTable ??= (() => {
                 actions[this.columns[i].name] = onMenuItemClicked;
             }
 
-            const createResizeElement = function(text, href) {
+            const createResizeElement = (text, href) => {
                 const anchor = document.createElement("a");
                 anchor.href = href;
                 anchor.textContent = text;
@@ -471,7 +471,7 @@ window.qBittorrent.DynamicTable ??= (() => {
             this.headerContextMenu.dynamicTable = this;
         },
 
-        initColumns: function() {},
+        initColumns: () => {},
 
         newColumn: function(name, style, caption, defaultWidth, defaultVisible) {
             const column = {};
@@ -623,7 +623,7 @@ window.qBittorrent.DynamicTable ??= (() => {
         },
 
         setSortedColumnIcon: function(newColumn, oldColumn, isReverse) {
-            const getCol = function(headerDivId, colName) {
+            const getCol = (headerDivId, colName) => {
                 const colElem = $$("#" + headerDivId + " .column_" + colName);
                 if (colElem.length === 1)
                     return colElem[0];
@@ -730,7 +730,7 @@ window.qBittorrent.DynamicTable ??= (() => {
             });
         },
 
-        onSelectedRowChanged: function() {},
+        onSelectedRowChanged: () => {},
 
         updateRowData: function(data) {
             // ensure rowId is a string
@@ -908,7 +908,7 @@ window.qBittorrent.DynamicTable ??= (() => {
                 trs.pop().destroy();
         },
 
-        setupTr: function(tr) {},
+        setupTr: (tr) => {},
 
         updateRow: function(tr, fullUpdate) {
             const row = this.rows.get(tr.rowId);
@@ -1200,7 +1200,7 @@ window.qBittorrent.DynamicTable ??= (() => {
                 td.title = status;
             };
 
-            this.columns["status"].compareRows = function(row1, row2) {
+            this.columns["status"].compareRows = (row1, row2) => {
                 return compareNumbers(row1.full_data._statusOrder, row2.full_data._statusOrder);
             };
 
@@ -1470,7 +1470,7 @@ window.qBittorrent.DynamicTable ??= (() => {
             };
         },
 
-        applyFilter: function(row, filterName, categoryHash, tagHash, trackerHash, filterTerms) {
+        applyFilter: (row, filterName, categoryHash, tagHash, trackerHash, filterTerms) => {
             const state = row["full_data"].state;
             let inactive = false;
 
@@ -1716,7 +1716,7 @@ window.qBittorrent.DynamicTable ??= (() => {
             return this.getSelectedRowId();
         },
 
-        onSelectedRowChanged: function() {
+        onSelectedRowChanged: () => {
             updatePropertiesPanel();
         }
     });
@@ -1875,7 +1875,7 @@ window.qBittorrent.DynamicTable ??= (() => {
         },
 
         getFilteredAndSortedRows: function() {
-            const getSizeFilters = function() {
+            const getSizeFilters = () => {
                 let minSize = (window.qBittorrent.Search.searchSizeFilter.min > 0.00) ? (window.qBittorrent.Search.searchSizeFilter.min * Math.pow(1024, window.qBittorrent.Search.searchSizeFilter.minUnit)) : 0.00;
                 let maxSize = (window.qBittorrent.Search.searchSizeFilter.max > 0.00) ? (window.qBittorrent.Search.searchSizeFilter.max * Math.pow(1024, window.qBittorrent.Search.searchSizeFilter.maxUnit)) : 0.00;
 
@@ -1891,7 +1891,7 @@ window.qBittorrent.DynamicTable ??= (() => {
                 };
             };
 
-            const getSeedsFilters = function() {
+            const getSeedsFilters = () => {
                 let minSeeds = (window.qBittorrent.Search.searchSeedsFilter.min > 0) ? window.qBittorrent.Search.searchSeedsFilter.min : 0;
                 let maxSeeds = (window.qBittorrent.Search.searchSeedsFilter.max > 0) ? window.qBittorrent.Search.searchSeedsFilter.max : 0;
 
@@ -1949,7 +1949,7 @@ window.qBittorrent.DynamicTable ??= (() => {
             return filteredRows;
         },
 
-        setupTr: function(tr) {
+        setupTr: (tr) => {
             tr.addClass("searchTableRow");
         }
     });
@@ -1984,7 +1984,7 @@ window.qBittorrent.DynamicTable ??= (() => {
             };
         },
 
-        setupTr: function(tr) {
+        setupTr: (tr) => {
             tr.addClass("searchPluginsTableRow");
         }
     });
@@ -2174,17 +2174,17 @@ window.qBittorrent.DynamicTable ??= (() => {
                 this.toggleNodeTreeCheckbox(node.children[i].rowId, checkState);
         },
 
-        updateGlobalCheckbox: function() {
+        updateGlobalCheckbox: () => {
             const checkbox = $("rootMultiRename_cb");
             const checkboxes = $$("input.RenamingCB");
-            const isAllChecked = function() {
+            const isAllChecked = () => {
                 for (let i = 0; i < checkboxes.length; ++i) {
                     if (!checkboxes[i].checked)
                         return false;
                 }
                 return true;
             };
-            const isAllUnchecked = function() {
+            const isAllUnchecked = () => {
                 for (let i = 0; i < checkboxes.length; ++i) {
                     if (checkboxes[i].checked)
                         return false;
@@ -2300,9 +2300,9 @@ window.qBittorrent.DynamicTable ??= (() => {
             };
         },
 
-        onRowSelectionChange: function(row) {},
+        onRowSelectionChange: (row) => {},
 
-        selectRow: function() {
+        selectRow: () => {
             return;
         },
 
@@ -2618,7 +2618,7 @@ window.qBittorrent.DynamicTable ??= (() => {
                     td.replaceChildren(span);
                 }
             };
-            this.columns["name"].calculateBuffer = function(rowId) {
+            this.columns["name"].calculateBuffer = (rowId) => {
                 const node = that.getNode(rowId);
                 // folders add 20px for folder icon and 15px for collapse icon
                 const folderBuffer = node.isFolder ? 35 : 0;
@@ -2814,8 +2814,8 @@ window.qBittorrent.DynamicTable ??= (() => {
                 td.title = value;
             };
         },
-        setupHeaderMenu: function() {},
-        setupHeaderEvents: function() {},
+        setupHeaderMenu: () => {},
+        setupHeaderEvents: () => {},
         getFilteredAndSortedRows: function() {
             return [...this.getRowValues()];
         },
@@ -2944,8 +2944,8 @@ window.qBittorrent.DynamicTable ??= (() => {
         initColumns: function() {
             this.newColumn("name", "", "QBT_TR(Torrents: (double-click to download))QBT_TR[CONTEXT=RSSWidget]", -1, true);
         },
-        setupHeaderMenu: function() {},
-        setupHeaderEvents: function() {},
+        setupHeaderMenu: () => {},
+        setupHeaderEvents: () => {},
         getFilteredAndSortedRows: function() {
             return [...this.getRowValues()];
         },
@@ -3056,8 +3056,8 @@ window.qBittorrent.DynamicTable ??= (() => {
             };
             this.columns["checked"].staticWidth = 50;
         },
-        setupHeaderMenu: function() {},
-        setupHeaderEvents: function() {},
+        setupHeaderMenu: () => {},
+        setupHeaderEvents: () => {},
         getFilteredAndSortedRows: function() {
             return [...this.getRowValues()];
         },
@@ -3148,8 +3148,8 @@ window.qBittorrent.DynamicTable ??= (() => {
             };
             this.columns["checked"].staticWidth = 50;
         },
-        setupHeaderMenu: function() {},
-        setupHeaderEvents: function() {},
+        setupHeaderMenu: () => {},
+        setupHeaderEvents: () => {},
         getFilteredAndSortedRows: function() {
             return [...this.getRowValues()];
         },
@@ -3189,7 +3189,7 @@ window.qBittorrent.DynamicTable ??= (() => {
             this.hiddenTableHeader.appendChild(new Element("th"));
             this.fixedTableHeader.appendChild(new Element("th"));
         },
-        selectRow: function() {}
+        selectRow: () => {}
     });
 
     const RssDownloaderArticlesTable = new Class({
@@ -3197,8 +3197,8 @@ window.qBittorrent.DynamicTable ??= (() => {
         initColumns: function() {
             this.newColumn("name", "", "", -1, true);
         },
-        setupHeaderMenu: function() {},
-        setupHeaderEvents: function() {},
+        setupHeaderMenu: () => {},
+        setupHeaderEvents: () => {},
         getFilteredAndSortedRows: function() {
             return [...this.getRowValues()];
         },
@@ -3238,7 +3238,7 @@ window.qBittorrent.DynamicTable ??= (() => {
             this.hiddenTableHeader.appendChild(new Element("th"));
             this.fixedTableHeader.appendChild(new Element("th"));
         },
-        selectRow: function() {},
+        selectRow: () => {},
         updateRow: function(tr, fullUpdate) {
             const row = this.rows.get(tr.rowId);
             const data = row[fullUpdate ? "full_data" : "data"];
@@ -3343,9 +3343,9 @@ window.qBittorrent.DynamicTable ??= (() => {
             return filteredRows;
         },
 
-        setupCommonEvents: function() {},
+        setupCommonEvents: () => {},
 
-        setupTr: function(tr) {
+        setupTr: (tr) => {
             tr.addClass("logTableRow");
         }
     });

src/webui/www/private/scripts/file-tree.js

@@ -88,7 +88,7 @@ window.qBittorrent.FileTree ??= (() => {
                 : this.nodeMap[rowId];
         },
 
-        getRowId: function(node) {
+        getRowId: (node) => {
             return node.rowId;
         },
 

src/webui/www/private/scripts/filesystem.js

@@ -46,21 +46,21 @@ window.qBittorrent.Filesystem ??= (() => {
     /**
      * Returns the file extension part of a file name.
      */
-    const fileExtension = function(filename) {
+    const fileExtension = (filename) => {
         const pointIndex = filename.lastIndexOf(".");
         if (pointIndex === -1)
             return "";
         return filename.substring(pointIndex + 1);
     };
 
-    const fileName = function(filepath) {
+    const fileName = (filepath) => {
         const slashIndex = filepath.lastIndexOf(PathSeparator);
         if (slashIndex === -1)
             return filepath;
         return filepath.substring(slashIndex + 1);
     };
 
-    const folderName = function(filepath) {
+    const folderName = (filepath) => {
         const slashIndex = filepath.lastIndexOf(PathSeparator);
         if (slashIndex === -1)
             return "";

src/webui/www/private/scripts/localpreferences.js

@@ -37,14 +37,14 @@ window.qBittorrent.LocalPreferences ??= (() => {
     };
 
     const LocalPreferencesClass = new Class({
-        get: function(key, defaultValue) {
+        get: (key, defaultValue) => {
             const value = localStorage.getItem(key);
             return ((value === null) && (defaultValue !== undefined))
                 ? defaultValue
                 : value;
         },
 
-        set: function(key, value) {
+        set: (key, value) => {
             try {
                 localStorage.setItem(key, value);
             }
@@ -53,7 +53,7 @@ window.qBittorrent.LocalPreferences ??= (() => {
             }
         },
 
-        remove: function(key) {
+        remove: (key) => {
             try {
                 localStorage.removeItem(key);
             }

src/webui/www/private/scripts/misc.js

@@ -53,7 +53,7 @@ window.qBittorrent.Misc ??= (() => {
         };
     };
 
-    const genHash = function(string) {
+    const genHash = (string) => {
         // origins:
         // https://stackoverflow.com/a/8831937
         // https://gist.github.com/hyamamoto/fd435505d29ebfa3d9716fd2be8d42f0
@@ -64,7 +64,7 @@ window.qBittorrent.Misc ??= (() => {
     };
 
     // getHost emulate the GUI version `QString getHost(const QString &url)`
-    const getHost = function(url) {
+    const getHost = (url) => {
         // We want the hostname.
         // If failed to parse the domain, original input should be returned
 
@@ -102,7 +102,7 @@ window.qBittorrent.Misc ??= (() => {
     /*
      * JS counterpart of the function in src/misc.cpp
      */
-    const friendlyUnit = function(value, isSpeed) {
+    const friendlyUnit = (value, isSpeed) => {
         const units = [
             "QBT_TR(B)QBT_TR[CONTEXT=misc]",
             "QBT_TR(KiB)QBT_TR[CONTEXT=misc]",
@@ -122,14 +122,14 @@ window.qBittorrent.Misc ??= (() => {
             ++i;
         }
 
-        function friendlyUnitPrecision(sizeUnit) {
+        const friendlyUnitPrecision = (sizeUnit) => {
             if (sizeUnit <= 2) // KiB, MiB
                 return 1;
             else if (sizeUnit === 3) // GiB
                 return 2;
             else // TiB, PiB, EiB
                 return 3;
-        }
+        };
 
         let ret;
         if (i === 0) {
@@ -150,7 +150,7 @@ window.qBittorrent.Misc ??= (() => {
     /*
      * JS counterpart of the function in src/misc.cpp
      */
-    const friendlyDuration = function(seconds, maxCap = -1) {
+    const friendlyDuration = (seconds, maxCap = -1) => {
         if ((seconds < 0) || ((seconds >= maxCap) && (maxCap >= 0)))
             return "∞";
         if (seconds === 0)
@@ -173,7 +173,7 @@ window.qBittorrent.Misc ??= (() => {
         return "QBT_TR(%1y %2d)QBT_TR[CONTEXT=misc]".replace("%1", Math.floor(years)).replace("%2", Math.floor(days));
     };
 
-    const friendlyPercentage = function(value) {
+    const friendlyPercentage = (value) => {
         let percentage = (value * 100).round(1);
         if (isNaN(percentage) || (percentage < 0))
             percentage = 0;
@@ -182,19 +182,19 @@ window.qBittorrent.Misc ??= (() => {
         return percentage.toFixed(1) + "%";
     };
 
-    const friendlyFloat = function(value, precision) {
+    const friendlyFloat = (value, precision) => {
         return parseFloat(value).toFixed(precision);
     };
 
     /*
      * JS counterpart of the function in src/misc.cpp
      */
-    const parseHtmlLinks = function(text) {
+    const parseHtmlLinks = (text) => {
         const exp = /(\b(https?|ftp|file):\/\/[-\w+&@#/%?=~|!:,.;]*[-\w+&@#/%=~|])/gi;
         return text.replace(exp, "<a target='_blank' rel='noopener noreferrer' href='$1'>$1</a>");
     };
 
-    const parseVersion = function(versionString) {
+    const parseVersion = (versionString) => {
         const failure = {
             valid: false
         };
@@ -228,7 +228,7 @@ window.qBittorrent.Misc ??= (() => {
     // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/Collator/Collator#parameters
     const naturalSortCollator = new Intl.Collator(undefined, { numeric: true, usage: "sort" });
 
-    const safeTrim = function(value) {
+    const safeTrim = (value) => {
         try {
             return value.trim();
         }
@@ -239,7 +239,7 @@ window.qBittorrent.Misc ??= (() => {
         }
     };
 
-    const toFixedPointString = function(number, digits) {
+    const toFixedPointString = (number, digits) => {
         // Do not round up number
         const power = Math.pow(10, digits);
         return (Math.floor(power * number) / power).toFixed(digits);
@@ -251,7 +251,7 @@ window.qBittorrent.Misc ??= (() => {
      * @param {Array<String>} terms terms to search for within the text
      * @returns {Boolean} true if all terms match the text, false otherwise
      */
-    const containsAllTerms = function(text, terms) {
+    const containsAllTerms = (text, terms) => {
         const textToSearch = text.toLowerCase();
         return terms.every((term) => {
             const isTermRequired = (term[0] === "+");

src/webui/www/private/scripts/mocha-init.js

@@ -87,7 +87,7 @@ window.qBittorrent.Dialog ??= (() => {
         },
         resizable: true,
         width: 480,
-        onCloseComplete: function() {
+        onCloseComplete: () => {
             // make sure overlay is properly hidden upon modal closing
             document.getElementById("modalOverlay").style.display = "none";
         }
@@ -101,75 +101,75 @@ Object.freeze(window.qBittorrent.Dialog);
 
 const LocalPreferences = new window.qBittorrent.LocalPreferences.LocalPreferencesClass();
 
-let saveWindowSize = function() {};
-let loadWindowWidth = function() {};
-let loadWindowHeight = function() {};
-let showDownloadPage = function() {};
-let globalUploadLimitFN = function() {};
-let uploadLimitFN = function() {};
-let shareRatioFN = function() {};
-let toggleSequentialDownloadFN = function() {};
-let toggleFirstLastPiecePrioFN = function() {};
-let setSuperSeedingFN = function() {};
-let setForceStartFN = function() {};
-let globalDownloadLimitFN = function() {};
-let StatisticsLinkFN = function() {};
-let downloadLimitFN = function() {};
-let deleteSelectedTorrentsFN = function() {};
-let stopFN = function() {};
-let startFN = function() {};
-let autoTorrentManagementFN = function() {};
-let recheckFN = function() {};
-let reannounceFN = function() {};
-let setLocationFN = function() {};
-let renameFN = function() {};
-let renameFilesFN = function() {};
-let startVisibleTorrentsFN = function() {};
-let stopVisibleTorrentsFN = function() {};
-let deleteVisibleTorrentsFN = function() {};
-let torrentNewCategoryFN = function() {};
-let torrentSetCategoryFN = function() {};
-let createCategoryFN = function() {};
-let createSubcategoryFN = function() {};
-let editCategoryFN = function() {};
-let removeCategoryFN = function() {};
-let deleteUnusedCategoriesFN = function() {};
-let torrentAddTagsFN = function() {};
-let torrentSetTagsFN = function() {};
-let torrentRemoveAllTagsFN = function() {};
-let createTagFN = function() {};
-let removeTagFN = function() {};
-let deleteUnusedTagsFN = function() {};
-let deleteTrackerFN = function() {};
-let copyNameFN = function() {};
-let copyInfohashFN = function(policy) {};
-let copyMagnetLinkFN = function() {};
-let copyIdFN = function() {};
-let copyCommentFN = function() {};
-let setQueuePositionFN = function() {};
-let exportTorrentFN = function() {};
+let saveWindowSize = () => {};
+let loadWindowWidth = () => {};
+let loadWindowHeight = () => {};
+let showDownloadPage = () => {};
+let globalUploadLimitFN = () => {};
+let uploadLimitFN = () => {};
+let shareRatioFN = () => {};
+let toggleSequentialDownloadFN = () => {};
+let toggleFirstLastPiecePrioFN = () => {};
+let setSuperSeedingFN = () => {};
+let setForceStartFN = () => {};
+let globalDownloadLimitFN = () => {};
+let StatisticsLinkFN = () => {};
+let downloadLimitFN = () => {};
+let deleteSelectedTorrentsFN = () => {};
+let stopFN = () => {};
+let startFN = () => {};
+let autoTorrentManagementFN = () => {};
+let recheckFN = () => {};
+let reannounceFN = () => {};
+let setLocationFN = () => {};
+let renameFN = () => {};
+let renameFilesFN = () => {};
+let startVisibleTorrentsFN = () => {};
+let stopVisibleTorrentsFN = () => {};
+let deleteVisibleTorrentsFN = () => {};
+let torrentNewCategoryFN = () => {};
+let torrentSetCategoryFN = () => {};
+let createCategoryFN = () => {};
+let createSubcategoryFN = () => {};
+let editCategoryFN = () => {};
+let removeCategoryFN = () => {};
+let deleteUnusedCategoriesFN = () => {};
+let torrentAddTagsFN = () => {};
+let torrentSetTagsFN = () => {};
+let torrentRemoveAllTagsFN = () => {};
+let createTagFN = () => {};
+let removeTagFN = () => {};
+let deleteUnusedTagsFN = () => {};
+let deleteTrackerFN = () => {};
+let copyNameFN = () => {};
+let copyInfohashFN = (policy) => {};
+let copyMagnetLinkFN = () => {};
+let copyIdFN = () => {};
+let copyCommentFN = () => {};
+let setQueuePositionFN = () => {};
+let exportTorrentFN = () => {};
 
-const initializeWindows = function() {
-    saveWindowSize = function(windowId) {
+const initializeWindows = () => {
+    saveWindowSize = (windowId) => {
         const size = $(windowId).getSize();
         LocalPreferences.set("window_" + windowId + "_width", size.x);
         LocalPreferences.set("window_" + windowId + "_height", size.y);
     };
 
-    loadWindowWidth = function(windowId, defaultValue) {
+    loadWindowWidth = (windowId, defaultValue) => {
         return LocalPreferences.get("window_" + windowId + "_width", defaultValue);
     };
 
-    loadWindowHeight = function(windowId, defaultValue) {
+    loadWindowHeight = (windowId, defaultValue) => {
         return LocalPreferences.get("window_" + windowId + "_height", defaultValue);
     };
 
-    function addClickEvent(el, fn) {
+    const addClickEvent = (el, fn) => {
         ["Link", "Button"].each((item) => {
             if ($(el + item))
                 $(el + item).addEventListener("click", fn);
         });
-    }
+    };
 
     addClickEvent("download", (e) => {
         e.preventDefault();
@@ -177,7 +177,7 @@ const initializeWindows = function() {
         showDownloadPage();
     });
 
-    showDownloadPage = function(urls) {
+    showDownloadPage = (urls) => {
         const id = "downloadPage";
         const contentUri = new URI("download.html");
 
@@ -248,7 +248,7 @@ const initializeWindows = function() {
             paddingHorizontal: 0,
             width: loadWindowWidth(id, 900),
             height: loadWindowHeight(id, 400),
-            onResize: function() {
+            onResize: () => {
                 saveWindowSize(id);
             }
         });
@@ -279,7 +279,7 @@ const initializeWindows = function() {
         updateMainData();
     });
 
-    globalUploadLimitFN = function() {
+    globalUploadLimitFN = () => {
         new MochaUI.Window({
             id: "uploadLimitPage",
             icon: "images/qbittorrent-tray.svg",
@@ -296,7 +296,7 @@ const initializeWindows = function() {
         });
     };
 
-    uploadLimitFN = function() {
+    uploadLimitFN = () => {
         const hashes = torrentsTable.selectedRowsIds();
         if (hashes.length) {
             new MochaUI.Window({
@@ -316,7 +316,7 @@ const initializeWindows = function() {
         }
     };
 
-    shareRatioFN = function() {
+    shareRatioFN = () => {
         const hashes = torrentsTable.selectedRowsIds();
         if (hashes.length) {
             let shareRatio = null;
@@ -357,7 +357,7 @@ const initializeWindows = function() {
         }
     };
 
-    toggleSequentialDownloadFN = function() {
+    toggleSequentialDownloadFN = () => {
         const hashes = torrentsTable.selectedRowsIds();
         if (hashes.length) {
             new Request({
@@ -371,7 +371,7 @@ const initializeWindows = function() {
         }
     };
 
-    toggleFirstLastPiecePrioFN = function() {
+    toggleFirstLastPiecePrioFN = () => {
         const hashes = torrentsTable.selectedRowsIds();
         if (hashes.length) {
             new Request({
@@ -385,7 +385,7 @@ const initializeWindows = function() {
         }
     };
 
-    setSuperSeedingFN = function(val) {
+    setSuperSeedingFN = (val) => {
         const hashes = torrentsTable.selectedRowsIds();
         if (hashes.length) {
             new Request({
@@ -400,7 +400,7 @@ const initializeWindows = function() {
         }
     };
 
-    setForceStartFN = function() {
+    setForceStartFN = () => {
         const hashes = torrentsTable.selectedRowsIds();
         if (hashes.length) {
             new Request({
@@ -415,7 +415,7 @@ const initializeWindows = function() {
         }
     };
 
-    globalDownloadLimitFN = function() {
+    globalDownloadLimitFN = () => {
         new MochaUI.Window({
             id: "downloadLimitPage",
             icon: "images/qbittorrent-tray.svg",
@@ -432,7 +432,7 @@ const initializeWindows = function() {
         });
     };
 
-    StatisticsLinkFN = function() {
+    StatisticsLinkFN = () => {
         const id = "statisticspage";
         new MochaUI.Window({
             id: id,
@@ -450,7 +450,7 @@ const initializeWindows = function() {
         });
     };
 
-    downloadLimitFN = function() {
+    downloadLimitFN = () => {
         const hashes = torrentsTable.selectedRowsIds();
         if (hashes.length) {
             new MochaUI.Window({
@@ -470,7 +470,7 @@ const initializeWindows = function() {
         }
     };
 
-    deleteSelectedTorrentsFN = function(forceDeleteFiles = false) {
+    deleteSelectedTorrentsFN = (forceDeleteFiles = false) => {
         const hashes = torrentsTable.selectedRowsIds();
         if (hashes.length > 0) {
             if (window.qBittorrent.Cache.preferences.get().confirm_torrent_deletion) {
@@ -483,11 +483,11 @@ const initializeWindows = function() {
                         forceDeleteFiles: forceDeleteFiles
                     },
                     contentURL: "views/confirmdeletion.html",
-                    onContentLoaded: function(w) {
+                    onContentLoaded: (w) => {
                         MochaUI.resizeWindow(w, { centered: true });
                         MochaUI.centerWindow(w);
                     },
-                    onCloseComplete: function() {
+                    onCloseComplete: () => {
                         // make sure overlay is properly hidden upon modal closing
                         document.getElementById("modalOverlay").style.display = "none";
                     }
@@ -501,12 +501,12 @@ const initializeWindows = function() {
                         hashes: hashes.join("|"),
                         deleteFiles: forceDeleteFiles
                     },
-                    onSuccess: function() {
+                    onSuccess: () => {
                         torrentsTable.deselectAll();
                         updateMainData();
                         updatePropertiesPanel();
                     },
-                    onFailure: function() {
+                    onFailure: () => {
                         alert("QBT_TR(Unable to delete torrents.)QBT_TR[CONTEXT=HttpServer]");
                     }
                 }).send();
@@ -520,7 +520,7 @@ const initializeWindows = function() {
         deleteSelectedTorrentsFN();
     });
 
-    stopFN = function() {
+    stopFN = () => {
         const hashes = torrentsTable.selectedRowsIds();
         if (hashes.length) {
             new Request({
@@ -534,7 +534,7 @@ const initializeWindows = function() {
         }
     };
 
-    startFN = function() {
+    startFN = () => {
         const hashes = torrentsTable.selectedRowsIds();
         if (hashes.length) {
             new Request({
@@ -548,7 +548,7 @@ const initializeWindows = function() {
         }
     };
 
-    autoTorrentManagementFN = function() {
+    autoTorrentManagementFN = () => {
         const hashes = torrentsTable.selectedRowsIds();
         if (hashes.length > 0) {
             const enableAutoTMM = hashes.some((hash) => !(torrentsTable.getRow(hash).full_data.auto_tmm));
@@ -583,7 +583,7 @@ const initializeWindows = function() {
         }
     };
 
-    recheckFN = function() {
+    recheckFN = () => {
         const hashes = torrentsTable.selectedRowsIds();
         if (hashes.length > 0) {
             if (window.qBittorrent.Cache.preferences.get().confirm_torrent_recheck) {
@@ -602,10 +602,10 @@ const initializeWindows = function() {
                     data: {
                         "hashes": hashes.join("|"),
                     },
-                    onSuccess: function() {
+                    onSuccess: () => {
                         updateMainData();
                     },
-                    onFailure: function() {
+                    onFailure: () => {
                         alert("QBT_TR(Unable to recheck torrents.)QBT_TR[CONTEXT=HttpServer]");
                     }
                 }).send();
@@ -613,7 +613,7 @@ const initializeWindows = function() {
         }
     };
 
-    reannounceFN = function() {
+    reannounceFN = () => {
         const hashes = torrentsTable.selectedRowsIds();
         if (hashes.length) {
             new Request({
@@ -627,7 +627,7 @@ const initializeWindows = function() {
         }
     };
 
-    setLocationFN = function() {
+    setLocationFN = () => {
         const hashes = torrentsTable.selectedRowsIds();
         if (hashes.length) {
             const hash = hashes[0];
@@ -650,7 +650,7 @@ const initializeWindows = function() {
         }
     };
 
-    renameFN = function() {
+    renameFN = () => {
         const hashes = torrentsTable.selectedRowsIds();
         if (hashes.length === 1) {
             const hash = hashes[0];
@@ -674,7 +674,7 @@ const initializeWindows = function() {
         }
     };
 
-    renameFilesFN = function() {
+    renameFilesFN = () => {
         const hashes = torrentsTable.selectedRowsIds();
         if (hashes.length === 1) {
             const hash = hashes[0];
@@ -700,7 +700,7 @@ const initializeWindows = function() {
         }
     };
 
-    startVisibleTorrentsFN = function() {
+    startVisibleTorrentsFN = () => {
         const hashes = torrentsTable.getFilteredTorrentsHashes(selectedStatus, selectedCategory, selectedTag, selectedTracker);
         if (hashes.length > 0) {
             new Request({
@@ -720,7 +720,7 @@ const initializeWindows = function() {
         }
     };
 
-    stopVisibleTorrentsFN = function() {
+    stopVisibleTorrentsFN = () => {
         const hashes = torrentsTable.getFilteredTorrentsHashes(selectedStatus, selectedCategory, selectedTag, selectedTracker);
         if (hashes.length > 0) {
             new Request({
@@ -740,7 +740,7 @@ const initializeWindows = function() {
         }
     };
 
-    deleteVisibleTorrentsFN = function() {
+    deleteVisibleTorrentsFN = () => {
         const hashes = torrentsTable.getFilteredTorrentsHashes(selectedStatus, selectedCategory, selectedTag, selectedTracker);
         if (hashes.length > 0) {
             if (window.qBittorrent.Cache.preferences.get().confirm_torrent_deletion) {
@@ -753,7 +753,7 @@ const initializeWindows = function() {
                         isDeletingVisibleTorrents: true
                     },
                     contentURL: "views/confirmdeletion.html",
-                    onContentLoaded: function(w) {
+                    onContentLoaded: (w) => {
                         MochaUI.resizeWindow(w, { centered: true });
                         MochaUI.centerWindow(w);
                     }
@@ -780,7 +780,7 @@ const initializeWindows = function() {
         }
     };
 
-    torrentNewCategoryFN = function() {
+    torrentNewCategoryFN = () => {
         const action = "set";
         const hashes = torrentsTable.selectedRowsIds();
         if (hashes.length) {
@@ -801,7 +801,7 @@ const initializeWindows = function() {
         }
     };
 
-    torrentSetCategoryFN = function(categoryHash) {
+    torrentSetCategoryFN = (categoryHash) => {
         const hashes = torrentsTable.selectedRowsIds();
         if (hashes.length <= 0)
             return;
@@ -816,13 +816,13 @@ const initializeWindows = function() {
                 hashes: hashes.join("|"),
                 category: categoryName
             },
-            onSuccess: function() {
+            onSuccess: () => {
                 updateMainData();
             }
         }).send();
     };
 
-    createCategoryFN = function() {
+    createCategoryFN = () => {
         const action = "create";
         new MochaUI.Window({
             id: "newCategoryPage",
@@ -840,7 +840,7 @@ const initializeWindows = function() {
         });
     };
 
-    createSubcategoryFN = function(categoryHash) {
+    createSubcategoryFN = (categoryHash) => {
         const action = "createSubcategory";
         const categoryName = category_list.get(categoryHash).name + "/";
         new MochaUI.Window({
@@ -859,7 +859,7 @@ const initializeWindows = function() {
         });
     };
 
-    editCategoryFN = function(categoryHash) {
+    editCategoryFN = (categoryHash) => {
         const action = "edit";
         const category = category_list.get(categoryHash);
         new MochaUI.Window({
@@ -878,7 +878,7 @@ const initializeWindows = function() {
         });
     };
 
-    removeCategoryFN = function(categoryHash) {
+    removeCategoryFN = (categoryHash) => {
         const categoryName = category_list.get(categoryHash).name;
         new Request({
             url: "api/v2/torrents/removeCategories",
@@ -886,14 +886,14 @@ const initializeWindows = function() {
             data: {
                 categories: categoryName
             },
-            onSuccess: function() {
+            onSuccess: () => {
                 setCategoryFilter(CATEGORIES_ALL);
                 updateMainData();
             }
         }).send();
     };
 
-    deleteUnusedCategoriesFN = function() {
+    deleteUnusedCategoriesFN = () => {
         const categories = [];
         category_list.forEach((category, hash) => {
             if (torrentsTable.getFilteredTorrentsNumber("all", hash, TAGS_ALL, TRACKERS_ALL) === 0)
@@ -906,14 +906,14 @@ const initializeWindows = function() {
             data: {
                 categories: categories.join("\n")
             },
-            onSuccess: function() {
+            onSuccess: () => {
                 setCategoryFilter(CATEGORIES_ALL);
                 updateMainData();
             }
         }).send();
     };
 
-    torrentAddTagsFN = function() {
+    torrentAddTagsFN = () => {
         const action = "set";
         const hashes = torrentsTable.selectedRowsIds();
         if (hashes.length) {
@@ -934,7 +934,7 @@ const initializeWindows = function() {
         }
     };
 
-    torrentSetTagsFN = function(tagHash, isSet) {
+    torrentSetTagsFN = (tagHash, isSet) => {
         const hashes = torrentsTable.selectedRowsIds();
         if (hashes.length <= 0)
             return;
@@ -950,7 +950,7 @@ const initializeWindows = function() {
         }).send();
     };
 
-    torrentRemoveAllTagsFN = function() {
+    torrentRemoveAllTagsFN = () => {
         const hashes = torrentsTable.selectedRowsIds();
         if (hashes.length) {
             new Request({
@@ -963,7 +963,7 @@ const initializeWindows = function() {
         }
     };
 
-    createTagFN = function() {
+    createTagFN = () => {
         const action = "create";
         new MochaUI.Window({
             id: "newTagPage",
@@ -982,7 +982,7 @@ const initializeWindows = function() {
         updateMainData();
     };
 
-    removeTagFN = function(tagHash) {
+    removeTagFN = (tagHash) => {
         const tagName = tagList.get(tagHash).name;
         new Request({
             url: "api/v2/torrents/deleteTags",
@@ -994,7 +994,7 @@ const initializeWindows = function() {
         setTagFilter(TAGS_ALL);
     };
 
-    deleteUnusedTagsFN = function() {
+    deleteUnusedTagsFN = () => {
         const tags = [];
         tagList.forEach((tag, hash) => {
             if (torrentsTable.getFilteredTorrentsNumber("all", CATEGORIES_ALL, hash, TRACKERS_ALL) === 0)
@@ -1010,7 +1010,7 @@ const initializeWindows = function() {
         setTagFilter(TAGS_ALL);
     };
 
-    deleteTrackerFN = function(trackerHash) {
+    deleteTrackerFN = (trackerHash) => {
         const trackerHashInt = Number.parseInt(trackerHash, 10);
         if ((trackerHashInt === TRACKERS_ALL) || (trackerHashInt === TRACKERS_TRACKERLESS))
             return;
@@ -1030,14 +1030,14 @@ const initializeWindows = function() {
             padding: 10,
             width: 424,
             height: 100,
-            onCloseComplete: function() {
+            onCloseComplete: () => {
                 updateMainData();
                 setTrackerFilter(TRACKERS_ALL);
             }
         });
     };
 
-    copyNameFN = function() {
+    copyNameFN = () => {
         const selectedRows = torrentsTable.selectedRowsIds();
         const names = [];
         if (selectedRows.length > 0) {
@@ -1050,7 +1050,7 @@ const initializeWindows = function() {
         return names.join("\n");
     };
 
-    copyInfohashFN = function(policy) {
+    copyInfohashFN = (policy) => {
         const selectedRows = torrentsTable.selectedRowsIds();
         const infohashes = [];
         if (selectedRows.length > 0) {
@@ -1075,7 +1075,7 @@ const initializeWindows = function() {
         return infohashes.join("\n");
     };
 
-    copyMagnetLinkFN = function() {
+    copyMagnetLinkFN = () => {
         const selectedRows = torrentsTable.selectedRowsIds();
         const magnets = [];
         if (selectedRows.length > 0) {
@@ -1088,11 +1088,11 @@ const initializeWindows = function() {
         return magnets.join("\n");
     };
 
-    copyIdFN = function() {
+    copyIdFN = () => {
         return torrentsTable.selectedRowsIds().join("\n");
     };
 
-    copyCommentFN = function() {
+    copyCommentFN = () => {
         const selectedRows = torrentsTable.selectedRowsIds();
         const comments = [];
         if (selectedRows.length > 0) {
@@ -1107,7 +1107,7 @@ const initializeWindows = function() {
         return comments.join("\n---------\n");
     };
 
-    exportTorrentFN = async function() {
+    exportTorrentFN = async () => {
         const hashes = torrentsTable.selectedRowsIds();
         for (const hash of hashes) {
             const row = torrentsTable.getRow(hash);
@@ -1192,7 +1192,7 @@ const initializeWindows = function() {
         });
     });
 
-    setQueuePositionFN = function(cmd) {
+    setQueuePositionFN = (cmd) => {
         const hashes = torrentsTable.selectedRowsIds();
         if (hashes.length) {
             new Request({
@@ -1238,7 +1238,7 @@ const initializeWindows = function() {
         new Request({
             url: "api/v2/auth/logout",
             method: "post",
-            onSuccess: function() {
+            onSuccess: () => {
                 window.location.reload(true);
             }
         }).send();
@@ -1252,7 +1252,7 @@ const initializeWindows = function() {
             new Request({
                 url: "api/v2/app/shutdown",
                 method: "post",
-                onSuccess: function() {
+                onSuccess: () => {
                     const shutdownMessage = "QBT_TR(%1 has been shutdown)QBT_TR[CONTEXT=HttpServer]".replace("%1", window.qBittorrent.Client.mainTitle());
                     document.write(`<!doctype html><html lang="${LANG}"><head> <meta charset="UTF-8"> <meta name="color-scheme" content="light dark"> <title>${shutdownMessage}</title> <style>* {font-family: Arial, Helvetica, sans-serif;}</style></head><body> <h1 style="text-align: center;">${shutdownMessage}</h1></body></html>`);
                     document.close();

src/webui/www/private/scripts/pathAutofill.js

@@ -40,7 +40,7 @@ window.qBittorrent.pathAutofill ??= (() => {
         };
     };
 
-    function showInputSuggestions(inputElement, names) {
+    const showInputSuggestions = (inputElement, names) => {
         const datalist = document.createElement("datalist");
         datalist.id = inputElement.id + "Suggestions";
         for (const name of names) {
@@ -57,9 +57,9 @@ window.qBittorrent.pathAutofill ??= (() => {
             inputElement.appendChild(datalist);
             inputElement.setAttribute("list", datalist.id);
         }
-    }
+    };
 
-    function showPathSuggestions(element, mode) {
+    const showPathSuggestions = (element, mode) => {
         const partialPath = element.value;
         if (partialPath === "")
             return;
@@ -68,7 +68,7 @@ window.qBittorrent.pathAutofill ??= (() => {
             .then(response => response.json())
             .then(filesList => { showInputSuggestions(element, filesList); })
             .catch(error => {});
-    }
+    };
 
     function attachPathAutofill() {
         const directoryInputs = document.querySelectorAll(".pathDirectory:not(.pathAutoFillInitialized)");

src/webui/www/private/scripts/piecesbar.js

@@ -46,7 +46,7 @@ window.qBittorrent.PiecesBar ??= (() => {
 
     let piecesBarUniqueId = 0;
     const PiecesBar = new Class({
-        initialize(pieces, parameters) {
+        initialize: (pieces, parameters) => {
             const vals = {
                 "id": "piecesbar_" + (piecesBarUniqueId++),
                 "width": 0,
@@ -253,7 +253,7 @@ window.qBittorrent.PiecesBar ??= (() => {
         }
     }
 
-    function checkForParent(id) {
+    const checkForParent = (id) => {
         const obj = $(id);
         if (!obj)
             return;
@@ -261,7 +261,7 @@ window.qBittorrent.PiecesBar ??= (() => {
             return setTimeout(() => { checkForParent(id); }, 100);
 
         obj.refresh();
-    }
+    };
 
     return exports();
 })();

src/webui/www/private/scripts/progressbar.js

@@ -38,7 +38,7 @@ window.qBittorrent.ProgressBar ??= (() => {
 
     let ProgressBars = 0;
     const ProgressBar = new Class({
-        initialize: function(value, parameters) {
+        initialize: (value, parameters) => {
             const vals = {
                 "id": "progressbar_" + (ProgressBars++),
                 "value": [value, 0].pick(),
@@ -107,7 +107,7 @@ window.qBittorrent.ProgressBar ??= (() => {
             if (vals.width)
                 obj.setValue(vals.value);
             else
-                setTimeout('ProgressBar_checkForParent("' + obj.id + '")');
+                setTimeout(ProgressBar_checkForParent, 0, obj.id);
             return obj;
         }
     });
@@ -142,19 +142,19 @@ window.qBittorrent.ProgressBar ??= (() => {
         }
     }
 
-    function ProgressBar_checkForParent(id) {
+    const ProgressBar_checkForParent = (id) => {
         const obj = $(id);
         if (!obj)
             return;
         if (!obj.parentNode)
-            return setTimeout('ProgressBar_checkForParent("' + id + '")', 100);
+            return setTimeout(ProgressBar_checkForParent, 100, id);
         obj.style.width = "100%";
         const w = obj.offsetWidth;
         obj.vals.dark.style.width = `${w}px`;
         obj.vals.light.style.width = `${w}px`;
         obj.vals.width = w;
         obj.setValue(obj.vals.value);
-    }
+    };
 
     return exports();
 })();

src/webui/www/private/scripts/prop-files.js

@@ -53,7 +53,7 @@ window.qBittorrent.PropFiles ??= (() => {
     let is_seed = true;
     let current_hash = "";
 
-    const normalizePriority = function(priority) {
+    const normalizePriority = (priority) => {
         switch (priority) {
             case FilePriority.Ignored:
             case FilePriority.Normal:
@@ -66,7 +66,7 @@ window.qBittorrent.PropFiles ??= (() => {
         }
     };
 
-    const getAllChildren = function(id, fileId) {
+    const getAllChildren = (id, fileId) => {
         const node = torrentFilesTable.getNode(id);
         if (!node.isFolder) {
             return {
@@ -78,7 +78,7 @@ window.qBittorrent.PropFiles ??= (() => {
         const rowIds = [];
         const fileIds = [];
 
-        const getChildFiles = function(node) {
+        const getChildFiles = (node) => {
             if (node.isFolder) {
                 node.children.each((child) => {
                     getChildFiles(child);
@@ -100,7 +100,7 @@ window.qBittorrent.PropFiles ??= (() => {
         };
     };
 
-    const fileCheckboxClicked = function(e) {
+    const fileCheckboxClicked = (e) => {
         e.stopPropagation();
 
         const checkbox = e.target;
@@ -114,7 +114,7 @@ window.qBittorrent.PropFiles ??= (() => {
         updateGlobalCheckbox();
     };
 
-    const fileComboboxChanged = function(e) {
+    const fileComboboxChanged = (e) => {
         const combobox = e.target;
         const priority = combobox.value;
         const id = combobox.getAttribute("data-id");
@@ -126,11 +126,11 @@ window.qBittorrent.PropFiles ??= (() => {
         updateGlobalCheckbox();
     };
 
-    const isDownloadCheckboxExists = function(id) {
-        return ($("cbPrio" + id) !== null);
+    const isDownloadCheckboxExists = (id) => {
+        return $("cbPrio" + id) !== null;
     };
 
-    const createDownloadCheckbox = function(id, fileId, checked) {
+    const createDownloadCheckbox = (id, fileId, checked) => {
         const checkbox = new Element("input");
         checkbox.type = "checkbox";
         checkbox.id = "cbPrio" + id;
@@ -143,12 +143,12 @@ window.qBittorrent.PropFiles ??= (() => {
         return checkbox;
     };
 
-    const updateDownloadCheckbox = function(id, checked) {
+    const updateDownloadCheckbox = (id, checked) => {
         const checkbox = $("cbPrio" + id);
         updateCheckbox(checkbox, checked);
     };
 
-    const updateCheckbox = function(checkbox, checked) {
+    const updateCheckbox = (checkbox, checked) => {
         switch (checked) {
             case TriState.Checked:
                 setCheckboxChecked(checkbox);
@@ -162,8 +162,8 @@ window.qBittorrent.PropFiles ??= (() => {
         }
     };
 
-    const isPriorityComboExists = function(id) {
-        return ($("comboPrio" + id) !== null);
+    const isPriorityComboExists = (id) => {
+        return $("comboPrio" + id) !== null;
     };
 
     const createPriorityCombo = (id, fileId, selectedPriority) => {
@@ -195,13 +195,13 @@ window.qBittorrent.PropFiles ??= (() => {
         return select;
     };
 
-    const updatePriorityCombo = function(id, selectedPriority) {
+    const updatePriorityCombo = (id, selectedPriority) => {
         const combobox = $("comboPrio" + id);
         if (parseInt(combobox.value, 10) !== selectedPriority)
             selectComboboxPriority(combobox, selectedPriority);
     };
 
-    const selectComboboxPriority = function(combobox, priority) {
+    const selectComboboxPriority = (combobox, priority) => {
         const options = combobox.options;
         for (let i = 0; i < options.length; ++i) {
             const option = options[i];
@@ -214,7 +214,7 @@ window.qBittorrent.PropFiles ??= (() => {
         combobox.value = priority;
     };
 
-    const switchCheckboxState = function(e) {
+    const switchCheckboxState = (e) => {
         e.stopPropagation();
 
         const rowIds = [];
@@ -256,7 +256,7 @@ window.qBittorrent.PropFiles ??= (() => {
             setFilePriority(rowIds, fileIds, priority);
     };
 
-    const updateGlobalCheckbox = function() {
+    const updateGlobalCheckbox = () => {
         const checkbox = $("tristate_cb");
         if (isAllCheckboxesChecked())
             setCheckboxChecked(checkbox);
@@ -266,24 +266,24 @@ window.qBittorrent.PropFiles ??= (() => {
             setCheckboxPartial(checkbox);
     };
 
-    const setCheckboxChecked = function(checkbox) {
+    const setCheckboxChecked = (checkbox) => {
         checkbox.state = "checked";
         checkbox.indeterminate = false;
         checkbox.checked = true;
     };
 
-    const setCheckboxUnchecked = function(checkbox) {
+    const setCheckboxUnchecked = (checkbox) => {
         checkbox.state = "unchecked";
         checkbox.indeterminate = false;
         checkbox.checked = false;
     };
 
-    const setCheckboxPartial = function(checkbox) {
+    const setCheckboxPartial = (checkbox) => {
         checkbox.state = "partial";
         checkbox.indeterminate = true;
     };
 
-    const isAllCheckboxesChecked = function() {
+    const isAllCheckboxesChecked = () => {
         const checkboxes = $$("input.DownloadedCB");
         for (let i = 0; i < checkboxes.length; ++i) {
             if (!checkboxes[i].checked)
@@ -292,7 +292,7 @@ window.qBittorrent.PropFiles ??= (() => {
         return true;
     };
 
-    const isAllCheckboxesUnchecked = function() {
+    const isAllCheckboxesUnchecked = () => {
         const checkboxes = $$("input.DownloadedCB");
         for (let i = 0; i < checkboxes.length; ++i) {
             if (checkboxes[i].checked)
@@ -301,7 +301,7 @@ window.qBittorrent.PropFiles ??= (() => {
         return true;
     };
 
-    const setFilePriority = function(ids, fileIds, priority) {
+    const setFilePriority = (ids, fileIds, priority) => {
         if (current_hash === "")
             return;
 
@@ -316,7 +316,7 @@ window.qBittorrent.PropFiles ??= (() => {
                 "id": fileIds.join("|"),
                 "priority": priority
             },
-            onComplete: function() {
+            onComplete: () => {
                 loadTorrentFilesDataTimer = loadTorrentFilesData.delay(1000);
             }
         }).send();
@@ -334,7 +334,7 @@ window.qBittorrent.PropFiles ??= (() => {
     };
 
     let loadTorrentFilesDataTimer = -1;
-    const loadTorrentFilesData = function() {
+    const loadTorrentFilesData = () => {
         if ($("propFiles").hasClass("invisible")
             || $("propertiesPanel_collapseToggle").hasClass("panel-expand")) {
             // Tab changed, don't do anything
@@ -357,11 +357,11 @@ window.qBittorrent.PropFiles ??= (() => {
             url: url,
             method: "get",
             noCache: true,
-            onComplete: function() {
+            onComplete: () => {
                 clearTimeout(loadTorrentFilesDataTimer);
                 loadTorrentFilesDataTimer = loadTorrentFilesData.delay(5000);
             },
-            onSuccess: function(files) {
+            onSuccess: (files) => {
                 clearTimeout(torrentFilesFilterInputTimer);
                 torrentFilesFilterInputTimer = -1;
 
@@ -377,13 +377,13 @@ window.qBittorrent.PropFiles ??= (() => {
         }).send();
     };
 
-    const updateData = function() {
+    const updateData = () => {
         clearTimeout(loadTorrentFilesDataTimer);
         loadTorrentFilesDataTimer = -1;
         loadTorrentFilesData();
     };
 
-    const handleNewTorrentFiles = function(files) {
+    const handleNewTorrentFiles = (files) => {
         is_seed = (files.length > 0) ? files[0].is_seed : true;
 
         const rows = files.map((file, index) => {
@@ -413,7 +413,7 @@ window.qBittorrent.PropFiles ??= (() => {
         updateGlobalCheckbox();
     };
 
-    const addRowsToTable = function(rows) {
+    const addRowsToTable = (rows) => {
         const selectedFiles = torrentFilesTable.selectedRowsIds();
         let rowId = 0;
 
@@ -481,7 +481,7 @@ window.qBittorrent.PropFiles ??= (() => {
             torrentFilesTable.reselectRows(selectedFiles);
     };
 
-    const collapseIconClicked = function(event) {
+    const collapseIconClicked = (event) => {
         const id = event.getAttribute("data-id");
         const node = torrentFilesTable.getNode(id);
         const isCollapsed = (event.parentElement.getAttribute("data-collapsed") === "true");
@@ -492,19 +492,19 @@ window.qBittorrent.PropFiles ??= (() => {
             collapseNode(node);
     };
 
-    const expandFolder = function(id) {
+    const expandFolder = (id) => {
         const node = torrentFilesTable.getNode(id);
         if (node.isFolder)
             expandNode(node);
     };
 
-    const collapseFolder = function(id) {
+    const collapseFolder = (id) => {
         const node = torrentFilesTable.getNode(id);
         if (node.isFolder)
             collapseNode(node);
     };
 
-    const filesPriorityMenuClicked = function(priority) {
+    const filesPriorityMenuClicked = (priority) => {
         const selectedRows = torrentFilesTable.selectedRowsIds();
         if (selectedRows.length === 0)
             return;
@@ -532,7 +532,7 @@ window.qBittorrent.PropFiles ??= (() => {
         setFilePriority(Object.keys(uniqueRowIds), Object.keys(uniqueFileIds), priority);
     };
 
-    const singleFileRename = function(hash) {
+    const singleFileRename = (hash) => {
         const rowId = torrentFilesTable.selectedRowsIds()[0];
         if (rowId === undefined)
             return;
@@ -560,7 +560,7 @@ window.qBittorrent.PropFiles ??= (() => {
         });
     };
 
-    const multiFileRename = function(hash) {
+    const multiFileRename = (hash) => {
         new MochaUI.Window({
             id: "multiRenamePage",
             icon: "images/qbittorrent-tray.svg",
@@ -583,7 +583,7 @@ window.qBittorrent.PropFiles ??= (() => {
         targets: "#torrentFilesTableDiv tr",
         menu: "torrentFilesMenu",
         actions: {
-            Rename: function(element, ref) {
+            Rename: (element, ref) => {
                 const hash = torrentsTable.getCurrentTorrentID();
                 if (!hash)
                     return;
@@ -594,16 +594,16 @@ window.qBittorrent.PropFiles ??= (() => {
                     singleFileRename(hash);
             },
 
-            FilePrioIgnore: function(element, ref) {
+            FilePrioIgnore: (element, ref) => {
                 filesPriorityMenuClicked(FilePriority.Ignored);
             },
-            FilePrioNormal: function(element, ref) {
+            FilePrioNormal: (element, ref) => {
                 filesPriorityMenuClicked(FilePriority.Normal);
             },
-            FilePrioHigh: function(element, ref) {
+            FilePrioHigh: (element, ref) => {
                 filesPriorityMenuClicked(FilePriority.High);
             },
-            FilePrioMaximum: function(element, ref) {
+            FilePrioMaximum: (element, ref) => {
                 filesPriorityMenuClicked(FilePriority.Maximum);
             }
         },
@@ -662,7 +662,7 @@ window.qBittorrent.PropFiles ??= (() => {
     /**
      * Show/hide a node's row
      */
-    const _hideNode = function(node, shouldHide) {
+    const _hideNode = (node, shouldHide) => {
         const span = $("filesTablefileName" + node.rowId);
         // span won't exist if row has been filtered out
         if (span === null)
@@ -677,7 +677,7 @@ window.qBittorrent.PropFiles ??= (() => {
     /**
      * Update a node's collapsed state and icon
      */
-    const _updateNodeState = function(node, isCollapsed) {
+    const _updateNodeState = (node, isCollapsed) => {
         const span = $("filesTablefileName" + node.rowId);
         // span won't exist if row has been filtered out
         if (span === null)
@@ -695,7 +695,7 @@ window.qBittorrent.PropFiles ??= (() => {
             collapseIcon.removeClass("rotate");
     };
 
-    const _isCollapsed = function(node) {
+    const _isCollapsed = (node) => {
         const span = $("filesTablefileName" + node.rowId);
         if (span === null)
             return true;
@@ -704,15 +704,15 @@ window.qBittorrent.PropFiles ??= (() => {
         return td.getAttribute("data-collapsed") === "true";
     };
 
-    const expandNode = function(node) {
+    const expandNode = (node) => {
         _collapseNode(node, false, false, false);
     };
 
-    const collapseNode = function(node) {
+    const collapseNode = (node) => {
         _collapseNode(node, true, false, false);
     };
 
-    const expandAllNodes = function() {
+    const expandAllNodes = () => {
         const root = torrentFilesTable.getRoot();
         root.children.each((node) => {
             node.children.each((child) => {
@@ -721,7 +721,7 @@ window.qBittorrent.PropFiles ??= (() => {
         });
     };
 
-    const collapseAllNodes = function() {
+    const collapseAllNodes = () => {
         const root = torrentFilesTable.getRoot();
         root.children.each((node) => {
             node.children.each((child) => {
@@ -737,7 +737,7 @@ window.qBittorrent.PropFiles ??= (() => {
      * @param {boolean} applyToChildren true if the node's children should also be collapsed, recursively
      * @param {boolean} isChildNode true if the current node is a child of the original node we collapsed/expanded
      */
-    const _collapseNode = function(node, shouldCollapse, applyToChildren, isChildNode) {
+    const _collapseNode = (node, shouldCollapse, applyToChildren, isChildNode) => {
         if (!node.isFolder)
             return;
 
@@ -764,7 +764,7 @@ window.qBittorrent.PropFiles ??= (() => {
         });
     };
 
-    const clear = function() {
+    const clear = () => {
         torrentFilesTable.clear();
     };
 

src/webui/www/private/scripts/prop-general.js

@@ -42,7 +42,7 @@ window.qBittorrent.PropGeneral ??= (() => {
     });
     $("progress").appendChild(piecesBar);
 
-    const clearData = function() {
+    const clearData = () => {
         $("time_elapsed").textContent = "";
         $("eta").textContent = "";
         $("nb_connections").textContent = "";
@@ -74,7 +74,7 @@ window.qBittorrent.PropGeneral ??= (() => {
     };
 
     let loadTorrentDataTimer = -1;
-    const loadTorrentData = function() {
+    const loadTorrentData = () => {
         if ($("propGeneral").hasClass("invisible")
             || $("propertiesPanel_collapseToggle").hasClass("panel-expand")) {
             // Tab changed, don't do anything
@@ -91,12 +91,12 @@ window.qBittorrent.PropGeneral ??= (() => {
             url: url,
             method: "get",
             noCache: true,
-            onFailure: function() {
+            onFailure: () => {
                 $("error_div").textContent = "QBT_TR(qBittorrent client is not reachable)QBT_TR[CONTEXT=HttpServer]";
                 clearTimeout(loadTorrentDataTimer);
                 loadTorrentDataTimer = loadTorrentData.delay(10000);
             },
-            onSuccess: function(data) {
+            onSuccess: (data) => {
                 $("error_div").textContent = "";
                 if (data) {
                     // Update Torrent data
@@ -229,12 +229,12 @@ window.qBittorrent.PropGeneral ??= (() => {
             url: piecesUrl,
             method: "get",
             noCache: true,
-            onFailure: function() {
+            onFailure: () => {
                 $("error_div").textContent = "QBT_TR(qBittorrent client is not reachable)QBT_TR[CONTEXT=HttpServer]";
                 clearTimeout(loadTorrentDataTimer);
                 loadTorrentDataTimer = loadTorrentData.delay(10000);
             },
-            onSuccess: function(data) {
+            onSuccess: (data) => {
                 $("error_div").textContent = "";
 
                 if (data)
@@ -248,13 +248,13 @@ window.qBittorrent.PropGeneral ??= (() => {
         }).send();
     };
 
-    const updateData = function() {
+    const updateData = () => {
         clearTimeout(loadTorrentDataTimer);
         loadTorrentDataTimer = -1;
         loadTorrentData();
     };
 
-    const clear = function() {
+    const clear = () => {
         clearData();
     };
 

src/webui/www/private/scripts/prop-peers.js

@@ -42,7 +42,7 @@ window.qBittorrent.PropPeers ??= (() => {
     let syncTorrentPeersLastResponseId = 0;
     let show_flags = true;
 
-    const loadTorrentPeersData = function() {
+    const loadTorrentPeersData = () => {
         if ($("propPeers").hasClass("invisible")
             || $("propertiesPanel_collapseToggle").hasClass("panel-expand")) {
             syncTorrentPeersLastResponseId = 0;
@@ -63,11 +63,11 @@ window.qBittorrent.PropPeers ??= (() => {
             url: url,
             method: "get",
             noCache: true,
-            onComplete: function() {
+            onComplete: () => {
                 clearTimeout(loadTorrentPeersTimer);
                 loadTorrentPeersTimer = loadTorrentPeersData.delay(window.qBittorrent.Client.getSyncMainDataInterval());
             },
-            onSuccess: function(response) {
+            onSuccess: (response) => {
                 $("error_div").textContent = "";
                 if (response) {
                     const full_update = (response["full_update"] === true);
@@ -106,13 +106,13 @@ window.qBittorrent.PropPeers ??= (() => {
         }).send();
     };
 
-    const updateData = function() {
+    const updateData = () => {
         clearTimeout(loadTorrentPeersTimer);
         loadTorrentPeersTimer = -1;
         loadTorrentPeersData();
     };
 
-    const clear = function() {
+    const clear = () => {
         torrentPeersTable.clear();
     };
 
@@ -120,7 +120,7 @@ window.qBittorrent.PropPeers ??= (() => {
         targets: "#torrentPeersTableDiv",
         menu: "torrentPeersMenu",
         actions: {
-            addPeer: function(element, ref) {
+            addPeer: (element, ref) => {
                 const hash = torrentsTable.getCurrentTorrentID();
                 if (!hash)
                     return;
@@ -140,7 +140,7 @@ window.qBittorrent.PropPeers ??= (() => {
                     height: 260
                 });
             },
-            banPeer: function(element, ref) {
+            banPeer: (element, ref) => {
                 const selectedPeers = torrentPeersTable.selectedRowsIds();
                 if (selectedPeers.length === 0)
                     return;
@@ -176,7 +176,7 @@ window.qBittorrent.PropPeers ??= (() => {
     });
 
     new ClipboardJS("#CopyPeerInfo", {
-        text: function(trigger) {
+        text: (trigger) => {
             return torrentPeersTable.selectedRowsIds().join("\n");
         }
     });

src/webui/www/private/scripts/prop-trackers.js

@@ -42,7 +42,7 @@ window.qBittorrent.PropTrackers ??= (() => {
     const torrentTrackersTable = new window.qBittorrent.DynamicTable.TorrentTrackersTable();
     let loadTrackersDataTimer = -1;
 
-    const loadTrackersData = function() {
+    const loadTrackersData = () => {
         if ($("propTrackers").hasClass("invisible")
             || $("propertiesPanel_collapseToggle").hasClass("panel-expand")) {
             // Tab changed, don't do anything
@@ -63,11 +63,11 @@ window.qBittorrent.PropTrackers ??= (() => {
             url: url,
             method: "get",
             noCache: true,
-            onComplete: function() {
+            onComplete: () => {
                 clearTimeout(loadTrackersDataTimer);
                 loadTrackersDataTimer = loadTrackersData.delay(10000);
             },
-            onSuccess: function(trackers) {
+            onSuccess: (trackers) => {
                 const selectedTrackers = torrentTrackersTable.selectedRowsIds();
                 torrentTrackersTable.clear();
 
@@ -117,7 +117,7 @@ window.qBittorrent.PropTrackers ??= (() => {
         }).send();
     };
 
-    const updateData = function() {
+    const updateData = () => {
         clearTimeout(loadTrackersDataTimer);
         loadTrackersDataTimer = -1;
         loadTrackersData();
@@ -127,15 +127,15 @@ window.qBittorrent.PropTrackers ??= (() => {
         targets: "#torrentTrackersTableDiv",
         menu: "torrentTrackersMenu",
         actions: {
-            AddTracker: function(element, ref) {
+            AddTracker: (element, ref) => {
                 addTrackerFN();
             },
-            EditTracker: function(element, ref) {
+            EditTracker: (element, ref) => {
                 // only allow editing of one row
                 element.firstChild.click();
                 editTrackerFN(element);
             },
-            RemoveTracker: function(element, ref) {
+            RemoveTracker: (element, ref) => {
                 removeTrackerFN(element);
             }
         },
@@ -162,7 +162,7 @@ window.qBittorrent.PropTrackers ??= (() => {
         }
     });
 
-    const addTrackerFN = function() {
+    const addTrackerFN = () => {
         if (current_hash.length === 0)
             return;
         new MochaUI.Window({
@@ -179,13 +179,13 @@ window.qBittorrent.PropTrackers ??= (() => {
             paddingHorizontal: 0,
             width: 500,
             height: 260,
-            onCloseComplete: function() {
+            onCloseComplete: () => {
                 updateData();
             }
         });
     };
 
-    const editTrackerFN = function(element) {
+    const editTrackerFN = (element) => {
         if (current_hash.length === 0)
             return;
 
@@ -204,13 +204,13 @@ window.qBittorrent.PropTrackers ??= (() => {
             paddingHorizontal: 0,
             width: 500,
             height: 150,
-            onCloseComplete: function() {
+            onCloseComplete: () => {
                 updateData();
             }
         });
     };
 
-    const removeTrackerFN = function(element) {
+    const removeTrackerFN = (element) => {
         if (current_hash.length === 0)
             return;
 
@@ -222,18 +222,18 @@ window.qBittorrent.PropTrackers ??= (() => {
                 hash: current_hash,
                 urls: selectedTrackers.map(encodeURIComponent).join("|")
             },
-            onSuccess: function() {
+            onSuccess: () => {
                 updateData();
             }
         }).send();
     };
 
-    const clear = function() {
+    const clear = () => {
         torrentTrackersTable.clear();
     };
 
     new ClipboardJS("#CopyTrackerUrl", {
-        text: function(trigger) {
+        text: (trigger) => {
             return torrentTrackersTable.selectedRowsIds().join("\n");
         }
     });

src/webui/www/private/scripts/prop-webseeds.js

@@ -42,7 +42,7 @@ window.qBittorrent.PropWebseeds ??= (() => {
     let current_hash = "";
 
     let loadWebSeedsDataTimer = -1;
-    const loadWebSeedsData = function() {
+    const loadWebSeedsData = () => {
         if ($("propWebSeeds").hasClass("invisible")
             || $("propertiesPanel_collapseToggle").hasClass("panel-expand")) {
             // Tab changed, don't do anything
@@ -62,11 +62,11 @@ window.qBittorrent.PropWebseeds ??= (() => {
             url: new URI("api/v2/torrents/webseeds").setData("hash", current_hash),
             method: "get",
             noCache: true,
-            onComplete: function() {
+            onComplete: () => {
                 clearTimeout(loadWebSeedsDataTimer);
                 loadWebSeedsDataTimer = loadWebSeedsData.delay(10000);
             },
-            onSuccess: function(webseeds) {
+            onSuccess: (webseeds) => {
                 const selectedWebseeds = torrentWebseedsTable.selectedRowsIds();
                 torrentWebseedsTable.clear();
 
@@ -88,7 +88,7 @@ window.qBittorrent.PropWebseeds ??= (() => {
         }).send();
     };
 
-    const updateData = function() {
+    const updateData = () => {
         clearTimeout(loadWebSeedsDataTimer);
         loadWebSeedsDataTimer = -1;
         loadWebSeedsData();
@@ -98,15 +98,15 @@ window.qBittorrent.PropWebseeds ??= (() => {
         targets: "#torrentWebseedsTableDiv",
         menu: "torrentWebseedsMenu",
         actions: {
-            AddWebSeeds: function(element, ref) {
+            AddWebSeeds: (element, ref) => {
                 addWebseedFN();
             },
-            EditWebSeed: function(element, ref) {
+            EditWebSeed: (element, ref) => {
                 // only allow editing of one row
                 element.firstChild.click();
                 editWebSeedFN(element);
             },
-            RemoveWebSeed: function(element, ref) {
+            RemoveWebSeed: (element, ref) => {
                 removeWebSeedFN(element);
             }
         },
@@ -134,7 +134,7 @@ window.qBittorrent.PropWebseeds ??= (() => {
         }
     });
 
-    const addWebseedFN = function() {
+    const addWebseedFN = () => {
         if (current_hash.length === 0)
             return;
 
@@ -151,13 +151,13 @@ window.qBittorrent.PropWebseeds ??= (() => {
             paddingHorizontal: 0,
             width: 500,
             height: 260,
-            onCloseComplete: function() {
+            onCloseComplete: () => {
                 updateData();
             }
         });
     };
 
-    const editWebSeedFN = function(element) {
+    const editWebSeedFN = (element) => {
         if (current_hash.length === 0)
             return;
 
@@ -180,13 +180,13 @@ window.qBittorrent.PropWebseeds ??= (() => {
             paddingHorizontal: 0,
             width: 500,
             height: 150,
-            onCloseComplete: function() {
+            onCloseComplete: () => {
                 updateData();
             }
         });
     };
 
-    const removeWebSeedFN = function(element) {
+    const removeWebSeedFN = (element) => {
         if (current_hash.length === 0)
             return;
 
@@ -198,18 +198,18 @@ window.qBittorrent.PropWebseeds ??= (() => {
                 hash: current_hash,
                 urls: selectedWebseeds.map(webseed => encodeURIComponent(webseed)).join("|")
             },
-            onSuccess: function() {
+            onSuccess: () => {
                 updateData();
             }
         }).send();
     };
 
-    const clear = function() {
+    const clear = () => {
         torrentWebseedsTable.clear();
     };
 
     new ClipboardJS("#CopyWebseedUrl", {
-        text: function(trigger) {
+        text: (trigger) => {
             return torrentWebseedsTable.selectedRowsIds().join("\n");
         }
     });

src/webui/www/private/scripts/rename-files.js

@@ -44,10 +44,10 @@ window.qBittorrent.MultiRename ??= (() => {
         replaceAll: false,
         fileEnumerationStart: 0,
 
-        onChanged: function(rows) {},
-        onInvalidRegex: function(err) {},
-        onRenamed: function(rows) {},
-        onRenameError: function(err) {},
+        onChanged: (rows) => {},
+        onInvalidRegex: (err) => {},
+        onRenamed: (rows) => {},
+        onRenameError: (err) => {},
 
         _inner_update: function() {
             const findMatches = (regex, str) => {

src/webui/www/private/scripts/search.js

@@ -105,7 +105,7 @@ window.qBittorrent.Search ??= (() => {
         }
     });
 
-    const init = function() {
+    const init = () => {
         // load "Search in" preference from local storage
         $("searchInTorrentName").value = (LocalPreferences.get("search_in_filter") === "names") ? "names" : "everywhere";
         const searchResultsTableContextMenu = new window.qBittorrent.ContextMenu.ContextMenu({
@@ -166,15 +166,15 @@ window.qBittorrent.Search ??= (() => {
             createSearchTab(id, pattern);
     };
 
-    const numSearchTabs = function() {
+    const numSearchTabs = () => {
         return $("searchTabs").getElements("li").length;
     };
 
-    const getSearchIdFromTab = function(tab) {
+    const getSearchIdFromTab = (tab) => {
         return Number(tab.id.substring(searchTabIdPrefix.length));
     };
 
-    const createSearchTab = function(searchId, pattern) {
+    const createSearchTab = (searchId, pattern) => {
         const newTabId = `${searchTabIdPrefix}${searchId}`;
         const tabElem = new Element("a", {
             text: pattern,
@@ -233,7 +233,7 @@ window.qBittorrent.Search ??= (() => {
         updateSearchResultsData(searchId);
     };
 
-    const closeSearchTab = function(el) {
+    const closeSearchTab = (el) => {
         const tab = el.closest("li.searchTab");
         if (!tab)
             return;
@@ -282,7 +282,7 @@ window.qBittorrent.Search ??= (() => {
         }
     };
 
-    const saveCurrentTabState = function() {
+    const saveCurrentTabState = () => {
         const currentSearchId = getSelectedSearchId();
         if (!currentSearchId)
             return;
@@ -313,7 +313,7 @@ window.qBittorrent.Search ??= (() => {
         state.selectedRowIds = [...searchResultsTable.selectedRows];
     };
 
-    const setActiveTab = function(tab) {
+    const setActiveTab = (tab) => {
         const searchId = getSearchIdFromTab(tab);
         if (searchId === getSelectedSearchId())
             return;
@@ -377,7 +377,7 @@ window.qBittorrent.Search ??= (() => {
         setupSearchTableEvents(true);
     };
 
-    const getStatusIconElement = function(text, image) {
+    const getStatusIconElement = (text, image) => {
         return new Element("img", {
             alt: text,
             title: text,
@@ -388,7 +388,7 @@ window.qBittorrent.Search ??= (() => {
         });
     };
 
-    const updateStatusIconElement = function(searchId, text, image) {
+    const updateStatusIconElement = (searchId, text, image) => {
         const searchTab = $(`${searchTabIdPrefix}${searchId}`);
         if (searchTab) {
             const statusIcon = searchTab.getElement(".statusIcon");
@@ -398,7 +398,7 @@ window.qBittorrent.Search ??= (() => {
         }
     };
 
-    const startSearch = function(pattern, category, plugins) {
+    const startSearch = (pattern, category, plugins) => {
         searchPatternChanged = false;
 
         const url = new URI("api/v2/search/start");
@@ -422,7 +422,7 @@ window.qBittorrent.Search ??= (() => {
         }).send();
     };
 
-    const stopSearch = function(searchId) {
+    const stopSearch = (searchId) => {
         const url = new URI("api/v2/search/stop");
         new Request({
             url: url,
@@ -430,7 +430,7 @@ window.qBittorrent.Search ??= (() => {
             data: {
                 id: searchId
             },
-            onSuccess: function(response) {
+            onSuccess: (response) => {
                 resetSearchState(searchId);
                 // not strictly necessary to do this when the tab is being closed, but there's no harm in it
                 updateStatusIconElement(searchId, "QBT_TR(Search aborted)QBT_TR[CONTEXT=SearchJobWidget]", "images/task-reject.svg");
@@ -438,12 +438,12 @@ window.qBittorrent.Search ??= (() => {
         }).send();
     };
 
-    const getSelectedSearchId = function() {
+    const getSelectedSearchId = () => {
         const selectedTab = $("searchTabs").getElement("li.selected");
         return selectedTab ? getSearchIdFromTab(selectedTab) : null;
     };
 
-    const startStopSearch = function() {
+    const startStopSearch = () => {
         const currentSearchId = getSelectedSearchId();
         const state = searchState.get(currentSearchId);
         const isSearchRunning = state && state.running;
@@ -463,12 +463,12 @@ window.qBittorrent.Search ??= (() => {
         }
     };
 
-    const openSearchTorrentDescriptionUrl = function() {
+    const openSearchTorrentDescriptionUrl = () => {
         for (const rowID of searchResultsTable.selectedRowsIds())
             window.open(searchResultsTable.getRow(rowID).full_data.descrLink, "_blank");
     };
 
-    const copySearchTorrentName = function() {
+    const copySearchTorrentName = () => {
         const names = [];
         searchResultsTable.selectedRowsIds().each((rowId) => {
             names.push(searchResultsTable.getRow(rowId).full_data.fileName);
@@ -476,7 +476,7 @@ window.qBittorrent.Search ??= (() => {
         return names.join("\n");
     };
 
-    const copySearchTorrentDownloadLink = function() {
+    const copySearchTorrentDownloadLink = () => {
         const urls = [];
         searchResultsTable.selectedRowsIds().each((rowId) => {
             urls.push(searchResultsTable.getRow(rowId).full_data.fileUrl);
@@ -484,7 +484,7 @@ window.qBittorrent.Search ??= (() => {
         return urls.join("\n");
     };
 
-    const copySearchTorrentDescriptionUrl = function() {
+    const copySearchTorrentDescriptionUrl = () => {
         const urls = [];
         searchResultsTable.selectedRowsIds().each((rowId) => {
             urls.push(searchResultsTable.getRow(rowId).full_data.descrLink);
@@ -492,7 +492,7 @@ window.qBittorrent.Search ??= (() => {
         return urls.join("\n");
     };
 
-    const downloadSearchTorrent = function() {
+    const downloadSearchTorrent = () => {
         const urls = [];
         for (const rowID of searchResultsTable.selectedRowsIds())
             urls.push(searchResultsTable.getRow(rowID).full_data.fileUrl);
@@ -504,7 +504,7 @@ window.qBittorrent.Search ??= (() => {
         showDownloadPage(urls);
     };
 
-    const manageSearchPlugins = function() {
+    const manageSearchPlugins = () => {
         const id = "searchPlugins";
         if (!$(id)) {
             new MochaUI.Window({
@@ -522,10 +522,10 @@ window.qBittorrent.Search ??= (() => {
                 onResize: window.qBittorrent.Misc.createDebounceHandler(500, (e) => {
                     saveWindowSize(id);
                 }),
-                onBeforeBuild: function() {
+                onBeforeBuild: () => {
                     loadSearchPlugins();
                 },
-                onClose: function() {
+                onClose: () => {
                     clearTimeout(loadSearchPluginsTimer);
                     loadSearchPluginsTimer = -1;
                 }
@@ -533,12 +533,12 @@ window.qBittorrent.Search ??= (() => {
         }
     };
 
-    const loadSearchPlugins = function() {
+    const loadSearchPlugins = () => {
         getPlugins();
         loadSearchPluginsTimer = loadSearchPlugins.delay(2000);
     };
 
-    const onSearchPatternChanged = function() {
+    const onSearchPatternChanged = () => {
         const currentSearchId = getSelectedSearchId();
         const state = searchState.get(currentSearchId);
         const currentSearchPattern = $("searchPattern").value.trim();
@@ -553,11 +553,11 @@ window.qBittorrent.Search ??= (() => {
         }
     };
 
-    const categorySelected = function() {
+    const categorySelected = () => {
         selectedCategory = $("categorySelect").value;
     };
 
-    const pluginSelected = function() {
+    const pluginSelected = () => {
         selectedPlugin = $("pluginsSelect").value;
 
         if (selectedPlugin !== prevSelectedPlugin) {
@@ -566,7 +566,7 @@ window.qBittorrent.Search ??= (() => {
         }
     };
 
-    const reselectCategory = function() {
+    const reselectCategory = () => {
         for (let i = 0; i < $("categorySelect").options.length; ++i) {
             if ($("categorySelect").options[i].get("value") === selectedCategory)
                 $("categorySelect").options[i].selected = true;
@@ -575,7 +575,7 @@ window.qBittorrent.Search ??= (() => {
         categorySelected();
     };
 
-    const reselectPlugin = function() {
+    const reselectPlugin = () => {
         for (let i = 0; i < $("pluginsSelect").options.length; ++i) {
             if ($("pluginsSelect").options[i].get("value") === selectedPlugin)
                 $("pluginsSelect").options[i].selected = true;
@@ -584,7 +584,7 @@ window.qBittorrent.Search ??= (() => {
         pluginSelected();
     };
 
-    const resetSearchState = function(searchId) {
+    const resetSearchState = (searchId) => {
         document.getElementById("startSearchButton").lastChild.textContent = "QBT_TR(Search)QBT_TR[CONTEXT=SearchEngineWidget]";
         const state = searchState.get(searchId);
         if (state) {
@@ -642,7 +642,7 @@ window.qBittorrent.Search ??= (() => {
         reselectCategory();
     };
 
-    const getPlugins = function() {
+    const getPlugins = () => {
         new Request.JSON({
             url: new URI("api/v2/search/plugins"),
             method: "get",
@@ -706,7 +706,7 @@ window.qBittorrent.Search ??= (() => {
         }).send();
     };
 
-    const getPlugin = function(name) {
+    const getPlugin = (name) => {
         for (let i = 0; i < searchPlugins.length; ++i) {
             if (searchPlugins[i].name === name)
                 return searchPlugins[i];
@@ -715,7 +715,7 @@ window.qBittorrent.Search ??= (() => {
         return null;
     };
 
-    const resetFilters = function() {
+    const resetFilters = () => {
         searchText.filterPattern = "";
         $("searchInNameFilter").value = "";
 
@@ -734,23 +734,23 @@ window.qBittorrent.Search ??= (() => {
         $("searchMaxSizePrefix").value = searchSizeFilter.maxUnit;
     };
 
-    const getSearchInTorrentName = function() {
+    const getSearchInTorrentName = () => {
         return ($("searchInTorrentName").value === "names") ? "names" : "everywhere";
     };
 
-    const searchInTorrentName = function() {
+    const searchInTorrentName = () => {
         LocalPreferences.set("search_in_filter", getSearchInTorrentName());
         searchFilterChanged();
     };
 
-    const searchSeedsFilterChanged = function() {
+    const searchSeedsFilterChanged = () => {
         searchSeedsFilter.min = $("searchMinSeedsFilter").value;
         searchSeedsFilter.max = $("searchMaxSeedsFilter").value;
 
         searchFilterChanged();
     };
 
-    const searchSizeFilterChanged = function() {
+    const searchSizeFilterChanged = () => {
         searchSizeFilter.min = $("searchMinSizeFilter").value;
         searchSizeFilter.minUnit = $("searchMinSizePrefix").value;
         searchSizeFilter.max = $("searchMaxSizeFilter").value;
@@ -759,17 +759,17 @@ window.qBittorrent.Search ??= (() => {
         searchFilterChanged();
     };
 
-    const searchSizeFilterPrefixChanged = function() {
+    const searchSizeFilterPrefixChanged = () => {
         if ((Number($("searchMinSizeFilter").value) !== 0) || (Number($("searchMaxSizeFilter").value) !== 0))
             searchSizeFilterChanged();
     };
 
-    const searchFilterChanged = function() {
+    const searchFilterChanged = () => {
         searchResultsTable.updateTable();
         $("numSearchResultsVisible").textContent = searchResultsTable.getFilteredAndSortedRows().length;
     };
 
-    const setupSearchTableEvents = function(enable) {
+    const setupSearchTableEvents = (enable) => {
         const clickHandler = (e) => { downloadSearchTorrent(); };
         if (enable) {
             $$(".searchTableRow").each((target) => {
@@ -881,7 +881,7 @@ window.qBittorrent.Search ??= (() => {
     };
 
     new ClipboardJS(".copySearchDataToClipboard", {
-        text: function(trigger) {
+        text: (trigger) => {
             switch (trigger.id) {
                 case "copySearchTorrentName":
                     return copySearchTorrentName();

src/webui/www/private/scripts/speedslider.js

@@ -29,7 +29,7 @@
 "use strict";
 
 MochaUI.extend({
-    addUpLimitSlider: function(hashes) {
+    addUpLimitSlider: (hashes) => {
         if ($("uplimitSliderarea")) {
             // Get global upload limit
             let maximum = 500;
@@ -37,7 +37,7 @@ MochaUI.extend({
                 url: "api/v2/transfer/uploadLimit",
                 method: "get",
                 data: {},
-                onSuccess: function(data) {
+                onSuccess: (data) => {
                     if (data) {
                         const tmp = data.toInt();
                         if (tmp > 0) {
@@ -61,7 +61,7 @@ MochaUI.extend({
                             steps: maximum,
                             offset: 0,
                             initialStep: up_limit.round(),
-                            onChange: function(pos) {
+                            onChange: (pos) => {
                                 if (pos > 0) {
                                     $("uplimitUpdatevalue").value = pos;
                                     $("upLimitUnit").style.visibility = "visible";
@@ -70,7 +70,7 @@ MochaUI.extend({
                                     $("uplimitUpdatevalue").value = "∞";
                                     $("upLimitUnit").style.visibility = "hidden";
                                 }
-                            }.bind(this)
+                            }
                         });
                         // Set default value
                         if (up_limit === 0) {
@@ -89,7 +89,7 @@ MochaUI.extend({
                             data: {
                                 hashes: hashes.join("|")
                             },
-                            onSuccess: function(data) {
+                            onSuccess: (data) => {
                                 if (data) {
                                     let up_limit = data[hashes[0]];
                                     for (const key in data) {
@@ -104,7 +104,7 @@ MochaUI.extend({
                                         steps: maximum,
                                         offset: 0,
                                         initialStep: (up_limit / 1024.0).round(),
-                                        onChange: function(pos) {
+                                        onChange: (pos) => {
                                             if (pos > 0) {
                                                 $("uplimitUpdatevalue").value = pos;
                                                 $("upLimitUnit").style.visibility = "visible";
@@ -113,7 +113,7 @@ MochaUI.extend({
                                                 $("uplimitUpdatevalue").value = "∞";
                                                 $("upLimitUnit").style.visibility = "hidden";
                                             }
-                                        }.bind(this)
+                                        }
                                     });
                                     // Set default value
                                     if (up_limit === 0) {
@@ -133,7 +133,7 @@ MochaUI.extend({
         }
     },
 
-    addDlLimitSlider: function(hashes) {
+    addDlLimitSlider: (hashes) => {
         if ($("dllimitSliderarea")) {
             // Get global upload limit
             let maximum = 500;
@@ -141,7 +141,7 @@ MochaUI.extend({
                 url: "api/v2/transfer/downloadLimit",
                 method: "get",
                 data: {},
-                onSuccess: function(data) {
+                onSuccess: (data) => {
                     if (data) {
                         const tmp = data.toInt();
                         if (tmp > 0) {
@@ -165,7 +165,7 @@ MochaUI.extend({
                             steps: maximum,
                             offset: 0,
                             initialStep: dl_limit.round(),
-                            onChange: function(pos) {
+                            onChange: (pos) => {
                                 if (pos > 0) {
                                     $("dllimitUpdatevalue").value = pos;
                                     $("dlLimitUnit").style.visibility = "visible";
@@ -174,7 +174,7 @@ MochaUI.extend({
                                     $("dllimitUpdatevalue").value = "∞";
                                     $("dlLimitUnit").style.visibility = "hidden";
                                 }
-                            }.bind(this)
+                            }
                         });
                         // Set default value
                         if (dl_limit === 0) {
@@ -193,7 +193,7 @@ MochaUI.extend({
                             data: {
                                 hashes: hashes.join("|")
                             },
-                            onSuccess: function(data) {
+                            onSuccess: (data) => {
                                 if (data) {
                                     let dl_limit = data[hashes[0]];
                                     for (const key in data) {
@@ -208,7 +208,7 @@ MochaUI.extend({
                                         steps: maximum,
                                         offset: 0,
                                         initialStep: (dl_limit / 1024.0).round(),
-                                        onChange: function(pos) {
+                                        onChange: (pos) => {
                                             if (pos > 0) {
                                                 $("dllimitUpdatevalue").value = pos;
                                                 $("dlLimitUnit").style.visibility = "visible";
@@ -217,7 +217,7 @@ MochaUI.extend({
                                                 $("dllimitUpdatevalue").value = "∞";
                                                 $("dlLimitUnit").style.visibility = "hidden";
                                             }
-                                        }.bind(this)
+                                        }
                                     });
                                     // Set default value
                                     if (dl_limit === 0) {