chore: convert various JS to TS (#2062)

10 files changed, 205 insertions, 96 deletions

diff --git a/src/stores/lib/Reaction.js b/src/stores/lib/Reaction.ts
index 7e1bc685e..0ca24a6fa 100644
--- a/src/stores/lib/Reaction.js
+++ b/src/stores/lib/Reaction.ts
@@ -20,12 +20,10 @@ export default class Reaction {
 
   stop() {
     if (this.isRunning) {
-      this.dispose();
+      this.dispose?.();
       this.isRunning = false;
     }
   }
 }
 
-export const createReactions = (reactions) => (
-  reactions.map((r) => new Reaction(r))
-);
+export const createReactions = reactions => reactions.map(r => new Reaction(r));
diff --git a/src/webview/contextMenu.js b/src/webview/contextMenu.js
deleted file mode 100644
index 567a2d470..000000000
--- a/src/webview/contextMenu.js
+++ /dev/null
@@ -1,20 +0,0 @@
-import { getCurrentWebContents } from '@electron/remote';
-import ContextMenuBuilder from './contextMenuBuilder';
-
-const webContents = getCurrentWebContents();
-
-export default async function setupContextMenu(isSpellcheckEnabled, getDefaultSpellcheckerLanguage, getSpellcheckerLanguage, getSearchEngine, getClipboardNotifications) {
-  const contextMenuBuilder = new ContextMenuBuilder(
-    webContents,
-  );
-
-  webContents.on('context-menu', (e, props) => {
-    // TODO?: e.preventDefault();
-    contextMenuBuilder.showPopupMenu(
-      { ...props, searchEngine: getSearchEngine(), clipboardNotifications: getClipboardNotifications() },
-      isSpellcheckEnabled(),
-      getDefaultSpellcheckerLanguage(),
-      getSpellcheckerLanguage(),
-    );
-  });
-}
diff --git a/src/webview/contextMenu.ts b/src/webview/contextMenu.ts
new file mode 100644
index 000000000..72f927ef4
--- /dev/null
+++ b/src/webview/contextMenu.ts
@@ -0,0 +1,29 @@
+import { getCurrentWebContents } from '@electron/remote';
+import { ContextMenuBuilder } from './contextMenuBuilder';
+
+const webContents = getCurrentWebContents();
+
+export default async function setupContextMenu(
+  isSpellcheckEnabled: () => void,
+  getDefaultSpellcheckerLanguage: () => void,
+  getSpellcheckerLanguage: () => void,
+  getSearchEngine: () => void,
+  getClipboardNotifications: () => void,
+) {
+  const contextMenuBuilder = new ContextMenuBuilder(webContents);
+
+  webContents.on('context-menu', (_e, props) => {
+    // TODO?: e.preventDefault();
+    contextMenuBuilder.showPopupMenu(
+      {
+        ...props,
+        searchEngine: getSearchEngine(),
+        clipboardNotifications: getClipboardNotifications(),
+      },
+      // @ts-expect-error Expected 1 arguments, but got 4.
+      isSpellcheckEnabled(),
+      getDefaultSpellcheckerLanguage(),
+      getSpellcheckerLanguage(),
+    );
+  });
+}
diff --git a/src/webview/contextMenuBuilder.js b/src/webview/contextMenuBuilder.ts
index 938eade1e..fda5fa8b8 100644
--- a/src/webview/contextMenuBuilder.js
+++ b/src/webview/contextMenuBuilder.ts
@@ -14,17 +14,38 @@ import { cmdOrCtrlShortcutKey, isMac } from '../environment';
 import { SEARCH_ENGINE_NAMES, SEARCH_ENGINE_URLS } from '../config';
 import { openExternalUrl } from '../helpers/url-helpers';
 
-const { URL } = require('url');
-
-function matchesWord(string) {
+function matchesWord(string: string) {
   const regex =
     /[A-Za-z\u00AA\u00B5\u00BA\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u02C1\u02C6-\u02D1\u02E0-\u02E4\u02EC\u02EE\u0370-\u0374\u0376\u0377\u037A-\u037D\u0386\u0388-\u038A\u038C\u038E-\u03A1\u03A3-\u03F5\u03F7-\u0481\u048A-\u0527\u0531-\u0556\u0559\u0561-\u0587\u05D0-\u05EA\u05F0-\u05F2\u0620-\u064A\u066E\u066F\u0671-\u06D3\u06D5\u06E5\u06E6\u06EE\u06EF\u06FA-\u06FC\u06FF\u0710\u0712-\u072F\u074D-\u07A5\u07B1\u07CA-\u07EA\u07F4\u07F5\u07FA\u0800-\u0815\u081A\u0824\u0828\u0840-\u0858\u08A0\u08A2-\u08AC\u0904-\u0939\u093D\u0950\u0958-\u0961\u0971-\u0977\u0979-\u097F\u0985-\u098C\u098F\u0990\u0993-\u09A8\u09AA-\u09B0\u09B2\u09B6-\u09B9\u09BD\u09CE\u09DC\u09DD\u09DF-\u09E1\u09F0\u09F1\u0A05-\u0A0A\u0A0F\u0A10\u0A13-\u0A28\u0A2A-\u0A30\u0A32\u0A33\u0A35\u0A36\u0A38\u0A39\u0A59-\u0A5C\u0A5E\u0A72-\u0A74\u0A85-\u0A8D\u0A8F-\u0A91\u0A93-\u0AA8\u0AAA-\u0AB0\u0AB2\u0AB3\u0AB5-\u0AB9\u0ABD\u0AD0\u0AE0\u0AE1\u0B05-\u0B0C\u0B0F\u0B10\u0B13-\u0B28\u0B2A-\u0B30\u0B32\u0B33\u0B35-\u0B39\u0B3D\u0B5C\u0B5D\u0B5F-\u0B61\u0B71\u0B83\u0B85-\u0B8A\u0B8E-\u0B90\u0B92-\u0B95\u0B99\u0B9A\u0B9C\u0B9E\u0B9F\u0BA3\u0BA4\u0BA8-\u0BAA\u0BAE-\u0BB9\u0BD0\u0C05-\u0C0C\u0C0E-\u0C10\u0C12-\u0C28\u0C2A-\u0C33\u0C35-\u0C39\u0C3D\u0C58\u0C59\u0C60\u0C61\u0C85-\u0C8C\u0C8E-\u0C90\u0C92-\u0CA8\u0CAA-\u0CB3\u0CB5-\u0CB9\u0CBD\u0CDE\u0CE0\u0CE1\u0CF1\u0CF2\u0D05-\u0D0C\u0D0E-\u0D10\u0D12-\u0D3A\u0D3D\u0D4E\u0D60\u0D61\u0D7A-\u0D7F\u0D85-\u0D96\u0D9A-\u0DB1\u0DB3-\u0DBB\u0DBD\u0DC0-\u0DC6\u0E01-\u0E30\u0E32\u0E33\u0E40-\u0E46\u0E81\u0E82\u0E84\u0E87\u0E88\u0E8A\u0E8D\u0E94-\u0E97\u0E99-\u0E9F\u0EA1-\u0EA3\u0EA5\u0EA7\u0EAA\u0EAB\u0EAD-\u0EB0\u0EB2\u0EB3\u0EBD\u0EC0-\u0EC4\u0EC6\u0EDC-\u0EDF\u0F00\u0F40-\u0F47\u0F49-\u0F6C\u0F88-\u0F8C\u1000-\u102A\u103F\u1050-\u1055\u105A-\u105D\u1061\u1065\u1066\u106E-\u1070\u1075-\u1081\u108E\u10A0-\u10C5\u10C7\u10CD\u10D0-\u10FA\u10FC-\u1248\u124A-\u124D\u1250-\u1256\u1258\u125A-\u125D\u1260-\u1288\u128A-\u128D\u1290-\u12B0\u12B2-\u12B5\u12B8-\u12BE\u12C0\u12C2-\u12C5\u12C8-\u12D6\u12D8-\u1310\u1312-\u1315\u1318-\u135A\u1380-\u138F\u13A0-\u13F4\u1401-\u166C\u166F-\u167F\u1681-\u169A\u16A0-\u16EA\u1700-\u170C\u170E-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176C\u176E-\u1770\u1780-\u17B3\u17D7\u17DC\u1820-\u1877\u1880-\u18A8\u18AA\u18B0-\u18F5\u1900-\u191C\u1950-\u196D\u1970-\u1974\u1980-\u19AB\u19C1-\u19C7\u1A00-\u1A16\u1A20-\u1A54\u1AA7\u1B05-\u1B33\u1B45-\u1B4B\u1B83-\u1BA0\u1BAE\u1BAF\u1BBA-\u1BE5\u1C00-\u1C23\u1C4D-\u1C4F\u1C5A-\u1C7D\u1CE9-\u1CEC\u1CEE-\u1CF1\u1CF5\u1CF6\u1D00-\u1DBF\u1E00-\u1F15\u1F18-\u1F1D\u1F20-\u1F45\u1F48-\u1F4D\u1F50-\u1F57\u1F59\u1F5B\u1F5D\u1F5F-\u1F7D\u1F80-\u1FB4\u1FB6-\u1FBC\u1FBE\u1FC2-\u1FC4\u1FC6-\u1FCC\u1FD0-\u1FD3\u1FD6-\u1FDB\u1FE0-\u1FEC\u1FF2-\u1FF4\u1FF6-\u1FFC\u2071\u207F\u2090-\u209C\u2102\u2107\u210A-\u2113\u2115\u2119-\u211D\u2124\u2126\u2128\u212A-\u212D\u212F-\u2139\u213C-\u213F\u2145-\u2149\u214E\u2183\u2184\u2C00-\u2C2E\u2C30-\u2C5E\u2C60-\u2CE4\u2CEB-\u2CEE\u2CF2\u2CF3\u2D00-\u2D25\u2D27\u2D2D\u2D30-\u2D67\u2D6F\u2D80-\u2D96\u2DA0-\u2DA6\u2DA8-\u2DAE\u2DB0-\u2DB6\u2DB8-\u2DBE\u2DC0-\u2DC6\u2DC8-\u2DCE\u2DD0-\u2DD6\u2DD8-\u2DDE\u2E2F\u3005\u3006\u3031-\u3035\u303B\u303C\u3041-\u3096\u309D-\u309F\u30A1-\u30FA\u30FC-\u30FF\u3105-\u312D\u3131-\u318E\u31A0-\u31BA\u31F0-\u31FF\u3400-\u4DB5\u4E00-\u9FCC\uA000-\uA48C\uA4D0-\uA4FD\uA500-\uA60C\uA610-\uA61F\uA62A\uA62B\uA640-\uA66E\uA67F-\uA697\uA6A0-\uA6E5\uA717-\uA71F\uA722-\uA788\uA78B-\uA78E\uA790-\uA793\uA7A0-\uA7AA\uA7F8-\uA801\uA803-\uA805\uA807-\uA80A\uA80C-\uA822\uA840-\uA873\uA882-\uA8B3\uA8F2-\uA8F7\uA8FB\uA90A-\uA925\uA930-\uA946\uA960-\uA97C\uA984-\uA9B2\uA9CF\uAA00-\uAA28\uAA40-\uAA42\uAA44-\uAA4B\uAA60-\uAA76\uAA7A\uAA80-\uAAAF\uAAB1\uAAB5\uAAB6\uAAB9-\uAABD\uAAC0\uAAC2\uAADB-\uAADD\uAAE0-\uAAEA\uAAF2-\uAAF4\uAB01-\uAB06\uAB09-\uAB0E\uAB11-\uAB16\uAB20-\uAB26\uAB28-\uAB2E\uABC0-\uABE2\uAC00-\uD7A3\uD7B0-\uD7C6\uD7CB-\uD7FB\uF900-\uFA6D\uFA70-\uFAD9\uFB00-\uFB06\uFB13-\uFB17\uFB1D\uFB1F-\uFB28\uFB2A-\uFB36\uFB38-\uFB3C\uFB3E\uFB40\uFB41\uFB43\uFB44\uFB46-\uFBB1\uFBD3-\uFD3D\uFD50-\uFD8F\uFD92-\uFDC7\uFDF0-\uFDFB\uFE70-\uFE74\uFE76-\uFEFC\uFF21-\uFF3A\uFF41-\uFF5A\uFF66-\uFFBE\uFFC2-\uFFC7\uFFCA-\uFFCF\uFFD2-\uFFD7\uFFDA-\uFFDC]+/g;
 
   return string.match(regex);
 }
 
+interface ContextMenuStringTable {
+  lookUpDefinition: ({ word }: { word: string }) => string;
+  cut: () => string;
+  copy: () => string;
+  paste: () => string;
+  pasteAndMatchStyle: () => string;
+  searchWith: ({ searchEngine }: { searchEngine: string }) => string;
+  openLinkUrl: () => string;
+  openLinkInFerdiUrl: () => string;
+  openInBrowser: () => string;
+  copyLinkUrl: () => string;
+  copyImageUrl: () => string;
+  copyImage: () => string;
+  downloadImage: () => string;
+  addToDictionary: () => string;
+  goBack: () => string;
+  goForward: () => string;
+  copyPageUrl: () => string;
+  goToHomePage: () => string;
+  copyMail: () => string;
+  inspectElement: () => string;
+}
+
 // TODO: Need to externalize for i18n
-const contextMenuStringTable = {
+const contextMenuStringTable: ContextMenuStringTable = {
   lookUpDefinition: ({ word }) => `Look Up "${word}"`,
   cut: () => 'Cut',
   copy: () => 'Copy',
@@ -54,16 +75,31 @@ const contextMenuStringTable = {
  * which we use to generate the menu. We also use the spell-check information to
  * generate suggestions.
  */
-module.exports = class ContextMenuBuilder {
+export class ContextMenuBuilder {
+  debugMode: boolean;
+
+  processMenu: (
+    menu: Electron.CrossProcessExports.Menu,
+  ) => Electron.CrossProcessExports.Menu;
+
+  menu: Electron.CrossProcessExports.Menu | null;
+
+  stringTable: ContextMenuStringTable;
+
+  getWebContents: () => Electron.WebContents;
+
   /**
    * Creates an instance of ContextMenuBuilder
    *
-   * @param  {WebContents} webContents  Current webContents
-   * @param  {Boolean} debugMode    If true, display the "Inspect Element" menu item.
-   * @param  {function} processMenu If passed, this method will be passed the menu to change
-   *                                it prior to display. Signature: (menu, info) => menu
+   * @param webContents Current webContents
+   * @param debugMode If true, display the "Inspect Element" menu item.
+   * @param processMenu If passed, this method will be passed the menu to change it prior to display. Signature: (menu, info) => menu
    */
-  constructor(webContents, debugMode = false, processMenu = m => m) {
+  constructor(
+    webContents: WebContents,
+    debugMode: boolean = false,
+    processMenu = (menu: Electron.CrossProcessExports.Menu) => menu,
+  ) {
     this.debugMode = debugMode;
     this.processMenu = processMenu;
     this.menu = null;
@@ -77,12 +113,11 @@ module.exports = class ContextMenuBuilder {
    * allows to change string in runtime. All formatters are simply typeof () => string, except
    * lookUpDefinition provides word, ({word}) => string.
    *
-   * @param {Object} stringTable The object contains string foramtter function for context menu.
+   * @param stringTable The object contains string formatter function for context menu.
    * It is allowed to specify only certain menu string as necessary, which will makes other string
    * fall backs to default.
-   *
    */
-  setAlternateStringFormatter(stringTable) {
+  setAlternateStringFormatter(stringTable: ContextMenuStringTable) {
     this.stringTable = Object.assign(this.stringTable, stringTable);
   }
 
@@ -90,12 +125,9 @@ module.exports = class ContextMenuBuilder {
    * Shows a popup menu given the information returned from the context-menu
    * event. This is probably the only method you need to call in this class.
    *
-   * @param  {Object} contextInfo   The object returned from the 'context-menu'
-   *                                Electron event.
-   *
-   * @return {Promise}              Completion
+   * @param contextInfo The object returned from the 'context-menu' Electron event.
    */
-  async showPopupMenu(contextInfo) {
+  async showPopupMenu(contextInfo: Electron.ContextMenuParams): Promise<void> {
     const menu = await this.buildMenuForElement(contextInfo);
     if (!menu) return;
     menu.popup();
@@ -105,10 +137,10 @@ module.exports = class ContextMenuBuilder {
    * Builds a context menu specific to the given info that _would_ be shown
    * immediately by {{showPopupMenu}}. Use this to add your own menu items to
    * the list but use most of the default behavior.
-   *
-   * @return {Promise<Menu>}      The newly created `Menu`
    */
-  async buildMenuForElement(info) {
+  async buildMenuForElement(
+    info: Electron.ContextMenuParams,
+  ): Promise<Electron.CrossProcessExports.Menu> {
     if (info.linkURL && info.linkURL.length > 0) {
       return this.buildMenuForLink(info);
     }
@@ -132,7 +164,9 @@ module.exports = class ContextMenuBuilder {
    *
    * @return {Menu}  The `Menu`
    */
-  buildMenuForTextInput(menuInfo) {
+  buildMenuForTextInput(
+    menuInfo: Electron.ContextMenuParams,
+  ): Electron.CrossProcessExports.Menu {
     const menu = new Menu();
 
     this.addSpellingItems(menu, menuInfo);
@@ -143,8 +177,10 @@ module.exports = class ContextMenuBuilder {
     this.addPaste(menu, menuInfo);
     this.addPastePlain(menu, menuInfo);
     this.addInspectElement(menu, menuInfo);
+    // @ts-expect-error Expected 1 arguments, but got 2.
     this.processMenu(menu, menuInfo);
 
+    // @ts-expect-error Expected 2 arguments, but got 1.
     this.copyPageUrl(menu);
     this.goToHomePage(menu, menuInfo);
     this.openInBrowser(menu, menuInfo);
@@ -157,7 +193,9 @@ module.exports = class ContextMenuBuilder {
    *
    * @return {Menu}  The `Menu`
    */
-  buildMenuForLink(menuInfo) {
+  buildMenuForLink(
+    menuInfo: Electron.ContextMenuParams,
+  ): Electron.CrossProcessExports.Menu {
     const menu = new Menu();
     const isEmailAddress = menuInfo.linkURL.startsWith('mailto:');
 
@@ -170,6 +208,7 @@ module.exports = class ContextMenuBuilder {
         const url = isEmailAddress ? menuInfo.linkText : menuInfo.linkURL;
         clipboard.writeText(url);
         this._sendNotificationOnClipboardEvent(
+          // @ts-expect-error Property 'clipboardNotifications' does not exist on type 'ContextMenuParams'.
           menuInfo.clipboardNotifications,
           () => `Link URL copied: ${url}`,
         );
@@ -200,11 +239,13 @@ module.exports = class ContextMenuBuilder {
     }
 
     this.addInspectElement(menu, menuInfo);
+    // @ts-expect-error Expected 1 arguments, but got 2.
     this.processMenu(menu, menuInfo);
 
     this.addSeparator(menu);
     this.goBack(menu);
     this.goForward(menu);
+    // @ts-expect-error Expected 2 arguments, but got 1.
     this.copyPageUrl(menu);
     this.goToHomePage(menu, menuInfo);
     this.openInBrowser(menu, menuInfo);
@@ -214,15 +255,16 @@ module.exports = class ContextMenuBuilder {
 
   /**
    * Builds a menu applicable to a text field.
-   *
-   * @return {Menu}  The `Menu`
    */
-  buildMenuForText(menuInfo) {
+  buildMenuForText(
+    menuInfo: Electron.ContextMenuParams,
+  ): Electron.CrossProcessExports.Menu {
     const menu = new Menu();
 
     this.addSearchItems(menu, menuInfo);
     this.addCopy(menu, menuInfo);
     this.addInspectElement(menu, menuInfo);
+    // @ts-expect-error Expected 1 arguments, but got 2.
     this.processMenu(menu, menuInfo);
 
     this.addSeparator(menu);
@@ -240,13 +282,16 @@ module.exports = class ContextMenuBuilder {
    *
    * @return {Menu}  The `Menu`
    */
-  buildMenuForImage(menuInfo) {
+  buildMenuForImage(
+    menuInfo: Electron.ContextMenuParams,
+  ): Electron.CrossProcessExports.Menu {
     const menu = new Menu();
 
     if (this.isSrcUrlValid(menuInfo)) {
       this.addImageItems(menu, menuInfo);
     }
     this.addInspectElement(menu, menuInfo);
+    // @ts-expect-error Expected 1 arguments, but got 2.
     this.processMenu(menu, menuInfo);
 
     return menu;
@@ -256,7 +301,10 @@ module.exports = class ContextMenuBuilder {
    * Checks if the current text selection contains a single misspelled word and
    * if so, adds suggested spellings as individual menu items.
    */
-  addSpellingItems(menu, menuInfo) {
+  addSpellingItems(
+    menu: Electron.CrossProcessExports.Menu,
+    menuInfo: Electron.ContextMenuParams,
+  ) {
     const webContents = this.getWebContents();
     // Add each spelling suggestion
     for (const suggestion of menuInfo.dictionarySuggestions) {
@@ -288,7 +336,10 @@ module.exports = class ContextMenuBuilder {
   /**
    * Adds search-related menu items.
    */
-  addSearchItems(menu, menuInfo) {
+  addSearchItems(
+    menu: Electron.CrossProcessExports.Menu,
+    menuInfo: Electron.ContextMenuParams,
+  ) {
     if (!menuInfo.selectionText || menuInfo.selectionText.length === 0) {
       return menu;
     }
@@ -313,9 +364,11 @@ module.exports = class ContextMenuBuilder {
 
     const search = new MenuItem({
       label: this.stringTable.searchWith({
+        // @ts-expect-error Property 'searchEngine' does not exist on type 'ContextMenuParams'.
         searchEngine: SEARCH_ENGINE_NAMES[menuInfo.searchEngine],
       }),
       click: () => {
+        // @ts-expect-error Property 'searchEngine' does not exist on type 'ContextMenuParams'.
         const url = SEARCH_ENGINE_URLS[menuInfo.searchEngine]({
           searchTerm: encodeURIComponent(menuInfo.selectionText),
         });
@@ -329,22 +382,28 @@ module.exports = class ContextMenuBuilder {
     return menu;
   }
 
-  isSrcUrlValid(menuInfo) {
+  isSrcUrlValid(menuInfo: Electron.ContextMenuParams) {
     return menuInfo.srcURL && menuInfo.srcURL.length > 0;
   }
 
   /**
    * Adds "Copy Image" and "Copy Image URL" items when `src` is valid.
    */
-  addImageItems(menu, menuInfo) {
+  addImageItems(
+    menu: Electron.CrossProcessExports.Menu,
+    menuInfo: Electron.ContextMenuParams,
+  ) {
     const copyImage = new MenuItem({
       label: this.stringTable.copyImage(),
       click: () => {
-        const result = this.convertImageToBase64(menuInfo.srcURL, dataURL =>
-          clipboard.writeImage(nativeImage.createFromDataURL(dataURL)),
+        const result = this.convertImageToBase64(
+          menuInfo.srcURL,
+          (dataURL: string) =>
+            clipboard.writeImage(nativeImage.createFromDataURL(dataURL)),
         );
 
         this._sendNotificationOnClipboardEvent(
+          // @ts-expect-error Property 'clipboardNotifications' does not exist on type 'ContextMenuParams'.
           menuInfo.clipboardNotifications,
           () => `Image copied from URL: ${menuInfo.srcURL}`,
         );
@@ -359,6 +418,7 @@ module.exports = class ContextMenuBuilder {
       click: () => {
         const result = clipboard.writeText(menuInfo.srcURL);
         this._sendNotificationOnClipboardEvent(
+          // @ts-expect-error Property 'clipboardNotifications' does not exist on type 'ContextMenuParams'.
           menuInfo.clipboardNotifications,
           () => `Image URL copied: ${menuInfo.srcURL}`,
         );
@@ -374,7 +434,7 @@ module.exports = class ContextMenuBuilder {
         label: this.stringTable.downloadImage(),
         click: () => {
           const urlWithoutBlob = menuInfo.srcURL.slice(5);
-          this.convertImageToBase64(menuInfo.srcURL, dataURL => {
+          this.convertImageToBase64(menuInfo.srcURL, (dataURL: any) => {
             const url = new window.URL(urlWithoutBlob);
             const fileName = url.pathname.slice(1);
             ipcRenderer.send('download-file', {
@@ -386,6 +446,7 @@ module.exports = class ContextMenuBuilder {
             });
           });
           this._sendNotificationOnClipboardEvent(
+            // @ts-expect-error Property 'clipboardNotifications' does not exist on type 'ContextMenuParams'.
             menuInfo.clipboardNotifications,
             () => `Image downloaded: ${urlWithoutBlob}`,
           );
@@ -401,7 +462,10 @@ module.exports = class ContextMenuBuilder {
   /**
    * Adds the Cut menu item
    */
-  addCut(menu, menuInfo) {
+  addCut(
+    menu: Electron.CrossProcessExports.Menu,
+    menuInfo: Electron.ContextMenuParams,
+  ) {
     const webContents = this.getWebContents();
     menu.append(
       new MenuItem({
@@ -418,7 +482,10 @@ module.exports = class ContextMenuBuilder {
   /**
    * Adds the Copy menu item.
    */
-  addCopy(menu, menuInfo) {
+  addCopy(
+    menu: Electron.CrossProcessExports.Menu,
+    menuInfo: Electron.ContextMenuParams,
+  ) {
     const webContents = this.getWebContents();
     menu.append(
       new MenuItem({
@@ -435,7 +502,10 @@ module.exports = class ContextMenuBuilder {
   /**
    * Adds the Paste menu item.
    */
-  addPaste(menu, menuInfo) {
+  addPaste(
+    menu: Electron.CrossProcessExports.Menu,
+    menuInfo: Electron.ContextMenuParams,
+  ) {
     const webContents = this.getWebContents();
     menu.append(
       new MenuItem({
@@ -449,7 +519,10 @@ module.exports = class ContextMenuBuilder {
     return menu;
   }
 
-  addPastePlain(menu, menuInfo) {
+  addPastePlain(
+    menu: Electron.CrossProcessExports.Menu,
+    menuInfo: Electron.ContextMenuParams,
+  ) {
     if (
       menuInfo.editFlags.canPaste &&
       !menuInfo.linkText &&
@@ -469,7 +542,7 @@ module.exports = class ContextMenuBuilder {
   /**
    * Adds a separator item.
    */
-  addSeparator(menu) {
+  addSeparator(menu: Electron.CrossProcessExports.Menu) {
     menu.append(new MenuItem({ type: 'separator' }));
     return menu;
   }
@@ -477,7 +550,11 @@ module.exports = class ContextMenuBuilder {
   /**
    * Adds the "Inspect Element" menu item.
    */
-  addInspectElement(menu, menuInfo, needsSeparator = true) {
+  addInspectElement(
+    menu: Electron.CrossProcessExports.Menu,
+    menuInfo: Electron.ContextMenuParams,
+    needsSeparator = true,
+  ) {
     const webContents = this.getWebContents();
     if (!this.debugMode) return menu;
     if (needsSeparator) this.addSeparator(menu);
@@ -498,21 +575,30 @@ module.exports = class ContextMenuBuilder {
    * @param  {Function} callback    A callback that will be invoked with the result
    * @param  {String} outputFormat  The image format to use, defaults to 'image/png'
    */
-  convertImageToBase64(url, callback, outputFormat = 'image/png') {
-    let canvas = document.createElement('canvas');
+  convertImageToBase64(
+    url: string,
+    callback: {
+      (dataURL: any): void;
+      (dataURL: any): void;
+      (arg0: string): void;
+    },
+    outputFormat: string = 'image/png',
+  ) {
+    let canvas: HTMLCanvasElement | null = document.createElement('canvas');
     const ctx = canvas.getContext('2d');
-    // eslint-disable-next-line no-undef
     const img = new Image();
     img.crossOrigin = 'Anonymous';
 
     img.addEventListener('load', () => {
-      canvas.height = img.height;
-      canvas.width = img.width;
-      ctx?.drawImage(img, 0, 0);
-
-      const dataURL = canvas.toDataURL(outputFormat);
-      canvas = null;
-      callback(dataURL);
+      if (canvas) {
+        canvas.height = img.height;
+        canvas.width = img.width;
+        ctx?.drawImage(img, 0, 0);
+
+        const dataURL = canvas.toDataURL(outputFormat);
+        canvas = null;
+        callback(dataURL);
+      }
     });
 
     img.src = url;
@@ -521,7 +607,7 @@ module.exports = class ContextMenuBuilder {
   /**
    * Adds the 'go back' menu item
    */
-  goBack(menu) {
+  goBack(menu: Electron.CrossProcessExports.Menu) {
     const webContents = this.getWebContents();
     menu.append(
       new MenuItem({
@@ -538,7 +624,7 @@ module.exports = class ContextMenuBuilder {
   /**
    * Adds the 'go forward' menu item
    */
-  goForward(menu) {
+  goForward(menu: Electron.CrossProcessExports.Menu) {
     const webContents = this.getWebContents();
     menu.append(
       new MenuItem({
@@ -555,7 +641,10 @@ module.exports = class ContextMenuBuilder {
   /**
    * Adds the 'copy page url' menu item.
    */
-  copyPageUrl(menu, menuInfo) {
+  copyPageUrl(
+    menu: Electron.CrossProcessExports.Menu,
+    menuInfo: Electron.ContextMenuParams,
+  ) {
     menu.append(
       new MenuItem({
         label: this.stringTable.copyPageUrl(),
@@ -563,7 +652,8 @@ module.exports = class ContextMenuBuilder {
         click: () => {
           clipboard.writeText(window.location.href);
           this._sendNotificationOnClipboardEvent(
-            menuInfo.clipboardNotifications,
+            // @ts-expect-error Property 'clipboardNotifications' does not exist on type 'ContextMenuParams'.
+            menuInfo?.clipboardNotifications,
             () => `Page URL copied: ${window.location.href}`,
           );
         },
@@ -576,8 +666,11 @@ module.exports = class ContextMenuBuilder {
   /**
    * Adds the 'go to home' menu item.
    */
-  goToHomePage(menu, menuInfo) {
-    const baseURL = new URL(menuInfo.pageURL);
+  goToHomePage(
+    menu: Electron.CrossProcessExports.Menu,
+    menuInfo: Electron.ContextMenuParams,
+  ) {
+    const baseURL = new window.URL(menuInfo.pageURL);
     menu.append(
       new MenuItem({
         label: this.stringTable.goToHomePage(),
@@ -596,7 +689,10 @@ module.exports = class ContextMenuBuilder {
   /**
    * Adds the 'open in browser' menu item.
    */
-  openInBrowser(menu, menuInfo) {
+  openInBrowser(
+    menu: Electron.CrossProcessExports.Menu,
+    menuInfo: Electron.ContextMenuParams,
+  ) {
     menu.append(
       new MenuItem({
         label: this.stringTable.openInBrowser(),
@@ -610,7 +706,10 @@ module.exports = class ContextMenuBuilder {
     return menu;
   }
 
-  _sendNotificationOnClipboardEvent(isDisabled, notificationText) {
+  _sendNotificationOnClipboardEvent(
+    isDisabled: boolean,
+    notificationText: () => string,
+  ) {
     if (isDisabled) {
       return;
     }
@@ -619,4 +718,4 @@ module.exports = class ContextMenuBuilder {
       body: notificationText(),
     });
   }
-};
+}
diff --git a/src/webview/darkmode/custom.js b/src/webview/darkmode/custom.ts
index f767f5755..f767f5755 100644
--- a/src/webview/darkmode/custom.js
+++ b/src/webview/darkmode/custom.ts
diff --git a/src/webview/darkmode/ignore.js b/src/webview/darkmode/ignore.js
deleted file mode 100644
index 110df364f..000000000
--- a/src/webview/darkmode/ignore.js
+++ /dev/null
@@ -1,3 +0,0 @@
-export default [
-  'discordapp.com',
-];
diff --git a/src/webview/darkmode/ignore.ts b/src/webview/darkmode/ignore.ts
new file mode 100644
index 000000000..daa25d10c
--- /dev/null
+++ b/src/webview/darkmode/ignore.ts
@@ -0,0 +1 @@
+export default ['discordapp.com'];
diff --git a/src/webview/find.js b/src/webview/find.ts
index 040811d68..0665d9670 100644
--- a/src/webview/find.js
+++ b/src/webview/find.ts
@@ -3,11 +3,15 @@ import { FindInPage as ElectronFindInPage } from 'electron-find';
 
 // Shim to expose webContents functionality to electron-find without @electron/remote
 const webContentsShim = {
-  findInPage: (text, options = {}) => ipcRenderer.sendSync('find-in-page', text, options),
-  stopFindInPage: (action) => {
+  findInPage: (text: string, options = {}) =>
+    ipcRenderer.sendSync('find-in-page', text, options),
+  stopFindInPage: (action: any) => {
     ipcRenderer.sendSync('stop-find-in-page', action);
   },
-  on: (eventName, listener) => {
+  on: (
+    eventName: string,
+    listener: (arg0: { sender: undefined }, arg1: any) => void,
+  ): void => {
     if (eventName === 'found-in-page') {
       ipcRenderer.on('found-in-page', (_, result) => {
         listener({ sender: this }, result);
diff --git a/src/webview/notifications.js b/src/webview/notifications.ts
index 22960d818..73124b9a9 100644
--- a/src/webview/notifications.js
+++ b/src/webview/notifications.ts
@@ -5,9 +5,10 @@ import { v1 as uuidV1 } from 'uuid';
 const debug = require('debug')('Ferdi:Notifications');
 
 export class NotificationsHandler {
-  onNotify = data => data;
+  onNotify = (data: { title: string; options: any; notificationId: string }) =>
+    data;
 
-  displayNotification(title, options) {
+  displayNotification(title: string, options: any) {
     return new Promise(resolve => {
       debug('New notification', title, options);
 
@@ -23,7 +24,7 @@ export class NotificationsHandler {
       );
 
       ipcRenderer.once(`notification-onclick:${notificationId}`, () => {
-        resolve();
+        resolve(true);
       });
     });
   }
diff --git a/src/webview/screenshare.js b/src/webview/screenshare.ts
index e7e43c04e..91a1623bb 100644
--- a/src/webview/screenshare.js
+++ b/src/webview/screenshare.ts
@@ -9,8 +9,8 @@ export async function getDisplayMediaSelector() {
   return `<div class="desktop-capturer-selection__scroller">
   <ul class="desktop-capturer-selection__list">
     ${sources
-    .map(
-      ({ id, name, thumbnail }) => `
+      .map(
+        ({ id, name, thumbnail }) => `
       <li class="desktop-capturer-selection__item">
         <button class="desktop-capturer-selection__btn" data-id="${id}" title="${name}">
           <img class="desktop-capturer-selection__thumbnail" src="${thumbnail.toDataURL()}" />
@@ -18,8 +18,8 @@ export async function getDisplayMediaSelector() {
         </button>
       </li>
     `,
-    )
-    .join('')}
+      )
+      .join('')}
     <li class="desktop-capturer-selection__item">
       <button class="desktop-capturer-selection__btn" data-id="${CANCEL_ID}" title="Cancel">
         <span class="desktop-capturer-selection__name desktop-capturer-selection__name--cancel">Cancel</span>