diff --git a/app/main/index.ts b/app/main/index.ts
index 791e16db..05c1d659 100644
--- a/app/main/index.ts
+++ b/app/main/index.ts
@@ -107,12 +107,12 @@ function createMainWindow(): Electron.BrowserWindow {
 	win.loadURL(mainURL);
 
 	// Keep the app running in background on close event
-	win.on('close', e => {
+	win.on('close', event => {
 		if (ConfigUtil.getConfigItem('quitOnClose')) {
 			app.quit();
 		}
 		if (!isQuitting) {
-			e.preventDefault();
+			event.preventDefault();
 
 			if (process.platform === 'darwin') {
 				app.hide();
@@ -133,8 +133,8 @@ function createMainWindow(): Electron.BrowserWindow {
 	});
 
 	//  To destroy tray icon when navigate to a new URL
-	win.webContents.on('will-navigate', e => {
-		if (e) {
+	win.webContents.on('will-navigate', event => {
+		if (event) {
 			win.webContents.send('destroytray');
 		}
 	});
@@ -305,8 +305,8 @@ app.on('ready', () => {
 		BadgeSettings.updateTaskbarIcon(data, text, mainWindow);
 	});
 
-	ipcMain.on('forward-message', (_event: Electron.IpcMainEvent, listener: string, ...params: any[]) => {
-		page.send(listener, ...params);
+	ipcMain.on('forward-message', (_event: Electron.IpcMainEvent, listener: string, ...parameters: any[]) => {
+		page.send(listener, ...parameters);
 	});
 
 	ipcMain.on('update-menu', (_event: Electron.IpcMainEvent, props: any) => {
diff --git a/app/main/menu.ts b/app/main/menu.ts
index dfed267b..5ce335ab 100644
--- a/app/main/menu.ts
+++ b/app/main/menu.ts
@@ -540,14 +540,14 @@ function getOtherTpl(props: any): Electron.MenuItemConstructorOptions[] {
 	}];
 }
 
-function sendAction(action: string, ...params: any[]): void {
+function sendAction(action: string, ...parameters: any[]): void {
 	const win = BrowserWindow.getAllWindows()[0];
 
 	if (process.platform === 'darwin') {
 		win.restore();
 	}
 
-	win.webContents.send(action, ...params);
+	win.webContents.send(action, ...parameters);
 }
 
 function checkForUpdate(): void {
diff --git a/app/renderer/js/components/functional-tab.ts b/app/renderer/js/components/functional-tab.ts
index ca64c1cd..3fbebbaf 100644
--- a/app/renderer/js/components/functional-tab.ts
+++ b/app/renderer/js/components/functional-tab.ts
@@ -39,9 +39,9 @@ export default class FunctionalTab extends Tab {
 			this.$closeButton.classList.remove('active');
 		});
 
-		this.$closeButton.addEventListener('click', (e: Event) => {
+		this.$closeButton.addEventListener('click', (event: Event) => {
 			this.props.onDestroy();
-			e.stopPropagation();
+			event.stopPropagation();
 		});
 	}
 }
diff --git a/app/renderer/js/components/webview.ts b/app/renderer/js/components/webview.ts
index 56ec92b8..7570ea32 100644
--- a/app/renderer/js/components/webview.ts
+++ b/app/renderer/js/components/webview.ts
@@ -192,8 +192,8 @@ export default class WebView extends BaseComponent {
 				this.customCSS = null;
 				ConfigUtil.setConfigItem('customCSS', null);
 
-				const errMsg = 'The custom css previously set is deleted!';
-				dialog.showErrorBox('custom css file deleted!', errMsg);
+				const errorMessage = 'The custom css previously set is deleted!';
+				dialog.showErrorBox('custom css file deleted!', errorMessage);
 				return;
 			}
 
@@ -295,8 +295,8 @@ export default class WebView extends BaseComponent {
 		this.init();
 	}
 
-	async send(channel: string, ...param: any[]): Promise<void> {
+	async send(channel: string, ...parameters: any[]): Promise<void> {
 		await this.domReady;
-		this.$el.send(channel, ...param);
+		this.$el.send(channel, ...parameters);
 	}
 }
diff --git a/app/renderer/js/feedback.ts b/app/renderer/js/feedback.ts
index b63b64f7..ab3f3ee6 100644
--- a/app/renderer/js/feedback.ts
+++ b/app/renderer/js/feedback.ts
@@ -61,10 +61,10 @@ sendFeedback.useReporter('emailReporter', {
 	email: 'akash@zulipchat.com'
 });
 
-feedbackHolder.addEventListener('click', (e: Event) => {
+feedbackHolder.addEventListener('click', (event: Event) => {
 	// only remove the class if the grey out faded
 	// part is clicked and not the feedback element itself
-	if (e.target === e.currentTarget) {
+	if (event.target === event.currentTarget) {
 		feedbackHolder.classList.remove('show');
 	}
 });
diff --git a/app/renderer/js/main.ts b/app/renderer/js/main.ts
index 1fa19b38..7f4fc7da 100644
--- a/app/renderer/js/main.ts
+++ b/app/renderer/js/main.ts
@@ -741,8 +741,8 @@ class ServerManagerView {
 	}
 
 	addContextMenu($serverImg: HTMLImageElement, index: number): void {
-		$serverImg.addEventListener('contextmenu', e => {
-			e.preventDefault();
+		$serverImg.addEventListener('contextmenu', event => {
+			event.preventDefault();
 			const template = [
 				{
 					label: 'Disconnect organization',
diff --git a/app/renderer/js/notification/darwin-notifications.ts b/app/renderer/js/notification/darwin-notifications.ts
index e9686b7f..cff779f8 100644
--- a/app/renderer/js/notification/darwin-notifications.ts
+++ b/app/renderer/js/notification/darwin-notifications.ts
@@ -19,13 +19,13 @@ interface NotificationHandlerArgs {
 class DarwinNotification {
 	tag: string;
 
-	constructor(title: string, opts: NotificationOptions) {
+	constructor(title: string, options: NotificationOptions) {
 		const silent: boolean = ConfigUtil.getConfigItem('silent') || false;
-		const { icon } = opts;
+		const { icon } = options;
 		const profilePic = new URL(icon, location.href).href;
 
-		this.tag = opts.tag;
-		const notification = new MacNotifier(title, Object.assign(opts, {
+		this.tag = options.tag;
+		const notification = new MacNotifier(title, Object.assign(options, {
 			bundleId: appId,
 			canReply: true,
 			silent,
diff --git a/app/renderer/js/notification/default-notification.ts b/app/renderer/js/notification/default-notification.ts
index 5ac32d89..d9ac004b 100644
--- a/app/renderer/js/notification/default-notification.ts
+++ b/app/renderer/js/notification/default-notification.ts
@@ -5,9 +5,9 @@ import * as ConfigUtil from '../utils/config-util';
 
 const NativeNotification = window.Notification;
 export default class BaseNotification extends NativeNotification {
-	constructor(title: string, opts: NotificationOptions) {
-		opts.silent = true;
-		super(title, opts);
+	constructor(title: string, options: NotificationOptions) {
+		options.silent = true;
+		super(title, options);
 
 		this.addEventListener('click', () => {
 			// focus to the server who sent the
diff --git a/app/renderer/js/pages/preference/new-server-form.ts b/app/renderer/js/pages/preference/new-server-form.ts
index 1ea9d4f8..ebffcfd5 100644
--- a/app/renderer/js/pages/preference/new-server-form.ts
+++ b/app/renderer/js/pages/preference/new-server-form.ts
@@ -72,8 +72,8 @@ export default class NewServerForm extends BaseComponent {
 
 	openCreateNewOrgExternalLink(): void {
 		const link = 'https://zulipchat.com/new/';
-		const externalCreateNewOrgEl = document.querySelector('#open-create-org-link');
-		externalCreateNewOrgEl.addEventListener('click', () => {
+		const externalCreateNewOrgElement = document.querySelector('#open-create-org-link');
+		externalCreateNewOrgElement.addEventListener('click', () => {
 			shell.openExternal(link);
 		});
 	}
diff --git a/app/renderer/js/pages/preference/shortcuts-section.ts b/app/renderer/js/pages/preference/shortcuts-section.ts
index 7876dcd6..ed3064ee 100644
--- a/app/renderer/js/pages/preference/shortcuts-section.ts
+++ b/app/renderer/js/pages/preference/shortcuts-section.ts
@@ -329,8 +329,8 @@ export default class ShortcutsSection extends BaseSection {
 
 	openHotkeysExternalLink(): void {
 		const link = 'https://zulipchat.com/help/keyboard-shortcuts';
-		const externalCreateNewOrgEl = document.querySelector('#open-hotkeys-link');
-		externalCreateNewOrgEl.addEventListener('click', () => {
+		const externalCreateNewOrgElement = document.querySelector('#open-hotkeys-link');
+		externalCreateNewOrgElement.addEventListener('click', () => {
 			shell.openExternal(link);
 		});
 	}
diff --git a/app/renderer/js/preload.ts b/app/renderer/js/preload.ts
index a8f4d2d5..34be51aa 100644
--- a/app/renderer/js/preload.ts
+++ b/app/renderer/js/preload.ts
@@ -108,16 +108,16 @@ document.addEventListener('DOMContentLoaded', (): void => {
 		}
 		// Open image attachment link in the lightbox instead of opening in the default browser
 		const { $, lightbox } = window;
-		$('#main_div').on('click', '.message_content p a', function (this: HTMLElement, e: Event) {
+		$('#main_div').on('click', '.message_content p a', function (this: HTMLElement, event: Event) {
 			const url = $(this).attr('href');
 
 			if (LinkUtil.isImage(url)) {
 				const $img = $(this).parent().siblings('.message_inline_image').find('img');
 
 				// prevent the image link from opening in a new page.
-				e.preventDefault();
+				event.preventDefault();
 				// prevent the message compose dialog from happening.
-				e.stopPropagation();
+				event.stopPropagation();
 
 				// Open image in the default browser if image preview is unavailable
 				if (!$img[0]) {
diff --git a/app/renderer/js/utils/domain-util.ts b/app/renderer/js/utils/domain-util.ts
index 1a020f42..0d330df8 100644
--- a/app/renderer/js/utils/domain-util.ts
+++ b/app/renderer/js/utils/domain-util.ts
@@ -282,10 +282,10 @@ function generateFilePath(url: string): string {
 	const extension = path.extname(url).split('?')[0];
 
 	let hash = 5381;
-	let len = url.length;
+	let { length } = url;
 
-	while (len) {
-		hash = (hash * 33) ^ url.charCodeAt(--len);
+	while (length) {
+		hash = (hash * 33) ^ url.charCodeAt(--length);
 	}
 
 	// Create 'server-icons' directory if not existed
diff --git a/app/renderer/js/utils/logger-util.ts b/app/renderer/js/utils/logger-util.ts
index e4fda34f..9452fe66 100644
--- a/app/renderer/js/utils/logger-util.ts
+++ b/app/renderer/js/utils/logger-util.ts
@@ -51,13 +51,13 @@ export default class Logger {
 	logInDevMode: boolean;
 	[key: string]: any;
 
-	constructor(opts: LoggerOptions = {}) {
+	constructor(options: LoggerOptions = {}) {
 		let {
 			timestamp = true,
 			file = 'console.log',
 			level = true,
 			logInDevMode = false
-		} = opts;
+		} = options;
 
 		file = `${logDir}/${file}`;
 		if (timestamp === true) {
diff --git a/app/renderer/js/utils/reconnect-util.ts b/app/renderer/js/utils/reconnect-util.ts
index a7567387..fe00f3f6 100644
--- a/app/renderer/js/utils/reconnect-util.ts
+++ b/app/renderer/js/utils/reconnect-util.ts
@@ -77,9 +77,9 @@ export default class ReconnectUtil {
 			return true;
 		}
 		logger.log('There is no internet connection, try checking network cables, modem and router.');
-		const errMsgHolder = document.querySelector('#description');
-		if (errMsgHolder) {
-			errMsgHolder.innerHTML = `
+		const errorMessageHolder = document.querySelector('#description');
+		if (errorMessageHolder) {
+			errorMessageHolder.innerHTML = `
 						<div>Your internet connection doesn't seem to work properly!</div>
 						<div>Verify that it works and then click try again.</div>`;
 		}
diff --git a/tests/setup.js b/tests/setup.js
index 488b8f66..8ad113e7 100644
--- a/tests/setup.js
+++ b/tests/setup.js
@@ -41,9 +41,9 @@ function generateTestAppPackageJson() {
 }
 
 // Starts the app, waits for it to load, returns a promise
-async function waitForLoad(app, t, opts) {
-	if (!opts) {
-		opts = {};
+async function waitForLoad(app, t, options) {
+	if (!options) {
+		options = {};
 	}
 
 	await app.start();
diff --git a/tools/locale-helper/index.js b/tools/locale-helper/index.js
index 94c4d5bc..a4bb36e7 100644
--- a/tools/locale-helper/index.js
+++ b/tools/locale-helper/index.js
@@ -18,9 +18,9 @@ for (const [locale, name] of Object.entries(supportedLocales)) {
 	console.log(`fetching translation for: ${name} - ${locale}..`);
 	(async () => {
 		try {
-			const res = await translate(phrases.join('\n'), {to: locale});
+			const result = await translate(phrases.join('\n'), {to: locale});
 			const localeFile = `${locale}.json`;
-			const translatedText = res.text.split('\n');
+			const translatedText = result.text.split('\n');
 			const translationJSON = {};
 			phrases.forEach((phrase, index) => {
 				translationJSON[phrase] = translatedText[index];