:memo: Fix code style issue

* Match equality operators for consistent that `==`, `!=` by `===`,
`!==`.
* Match string expression notation `"` by `'`.

[ci skip]

docs/api/app.md

@@ -176,7 +176,7 @@ certificate you should prevent the default behavior with
 
 ```javascript
 app.on('certificate-error', function(event, webContents, url, error, certificate, callback) {
-  if (url == "https://github.com") {
+  if (url === 'https://github.com') {
     // Verification logic.
     event.preventDefault();
     callback(true);

docs/api/desktop-capturer.md

@@ -10,7 +10,7 @@ var { desktopCapturer } = require('electron');
 desktopCapturer.getSources({types: ['window', 'screen']}, (error, sources) => {
   if (error) throw error;
   for (var i = 0; i < sources.length; ++i) {
-    if (sources[i].name == "Electron") {
+    if (sources[i].name === 'Electron') {
       navigator.webkitGetUserMedia({
         audio: false,
         video: {

docs/api/download-item.md

@@ -18,10 +18,10 @@ win.webContents.session.on('will-download', (event, item, webContents) => {
     console.log('Received bytes: ' + item.getReceivedBytes());
   });
   item.on('done', (e, state) => {
-    if (state === "completed") {
-      console.log("Download successfully");
+    if (state === 'completed') {
+      console.log('Download successfully');
     } else {
-      console.log("Download is cancelled or interrupted that can't be resumed");
+      console.log('Download is cancelled or interrupted that can\'t be resumed');
     }
   });
 });

docs/api/menu.md

@@ -98,7 +98,7 @@ const template = [
       {
         label: 'Toggle Developer Tools',
         accelerator: (() => {
-          if (process.platform == 'darwin')
+          if (process.platform === 'darwin')
             return 'Alt+Command+I';
           else
             return 'Ctrl+Shift+I';

docs/api/remote.md

@@ -79,7 +79,7 @@ exports.withLocalCallback = () => {
 
 ```javascript
 // renderer process
-const mapNumbers = require("remote").require("./mapNumbers");
+const mapNumbers = require('remote').require('./mapNumbers');
 
 const withRendererCb = mapNumbers.withRendererCallback(x => x + 1);
 

docs/api/screen.md

@@ -37,7 +37,7 @@ app.on('ready', () => {
   var displays = electronScreen.getAllDisplays();
   var externalDisplay = null;
   for (let i in displays) {
-    if (displays[i].bounds.x != 0 || displays[i].bounds.y != 0) {
+    if (displays[i].bounds.x !== 0 || displays[i].bounds.y !== 0) {
       externalDisplay = displays[i];
       break;
     }

docs/api/session.md

@@ -12,7 +12,7 @@ property of [`webContents`](web-contents.md) which is a property of
 const { BrowserWindow } = require('electron');
 
 let win = new BrowserWindow({ width: 800, height: 600 });
-win.loadURL("http://github.com");
+win.loadURL('http://github.com');
 
 const ses = win.webContents.session;
 ```
@@ -89,13 +89,13 @@ session.defaultSession.cookies.get({}, (error, cookies) => {
 });
 
 // Query all cookies associated with a specific url.
-session.defaultSession.cookies.get({ url : "http://www.github.com" }, (error, cookies) => {
+session.defaultSession.cookies.get({ url : 'http://www.github.com' }, (error, cookies) => {
   console.log(cookies);
 });
 
 // Set a cookie with the given cookie data;
 // may overwrite equivalent cookies if they exist.
-const cookie = { url : "http://www.github.com", name : "dummy_name", value : "dummy" };
+const cookie = { url : 'http://www.github.com', name : 'dummy_name', value : 'dummy' };
 session.defaultSession.cookies.set(cookie, (error) => {
   if (error)
     console.error(error);
@@ -307,7 +307,7 @@ Calling `callback(true)` will allow the permission and `callback(false)` will re
 ```javascript
 session.fromPartition(partition).setPermissionRequestHandler((webContents, permission, callback) => {
   if (webContents.getURL() === host) {
-    if (permission === "notifications") {
+    if (permission === 'notifications') {
       callback(false); // denied.
       return;
     }
@@ -343,7 +343,7 @@ called with an `response` object when `listener` has done its work.
 ```javascript
 // Modify the user agent for all requests to the following urls.
 const filter = {
-  urls: ["https://*.github.com/*", "*://electron.github.io"]
+  urls: ['https://*.github.com/*', '*://electron.github.io']
 };
 
 session.defaultSession.webRequest.onBeforeSendHeaders(filter, (details, callback) => {

docs/api/web-contents.md

@@ -12,7 +12,7 @@ the [`BrowserWindow`](browser-window.md) object. An example of accessing the
 const { BrowserWindow } = require('electron');
 
 let win = new BrowserWindow({width: 800, height: 1500});
-win.loadURL("http://github.com");
+win.loadURL('http://github.com');
 
 let webContents = win.webContents;
 ```
@@ -384,7 +384,7 @@ e.g. the `http://` or `file://`. If the load should bypass http cache then
 use the `pragma` header to achieve it.
 
 ```javascript
-const options = {"extraHeaders" : "pragma: no-cache\n"}
+const options = {extraHeaders: 'pragma: no-cache\n'};
 webContents.loadURL(url, options)
 ```
 
@@ -401,7 +401,7 @@ Returns URL of the current web page.
 
 ```javascript
 let win = new BrowserWindow({width: 800, height: 600});
-win.loadURL("http://github.com");
+win.loadURL('http://github.com');
 
 let currentURL = win.webContents.getURL();
 ```
@@ -605,10 +605,10 @@ Stops any `findInPage` request for the `webContents` with the provided `action`.
 ```javascript
 webContents.on('found-in-page', function(event, result) {
   if (result.finalUpdate)
-    webContents.stopFindInPage("clearSelection");
+    webContents.stopFindInPage('clearSelection');
 });
 
-const requestId = webContents.findInPage("api");
+const requestId = webContents.findInPage('api');
 ```
 
 ### `webContents.hasServiceWorker(callback)`
@@ -898,7 +898,7 @@ win.loadURL('https://github.com');
 win.webContents.on('did-finish-load', () => {
   win.webContents.savePage('/tmp/test.html', 'HTMLComplete', (error) => {
     if (!error)
-      console.log("Save page successfully");
+      console.log('Save page successfully');
   });
 });
 ```
@@ -928,23 +928,23 @@ Debugger API serves as an alternate transport for [remote debugging protocol][rd
 
 ```javascript
 try {
-  win.webContents.debugger.attach("1.1");
+  win.webContents.debugger.attach('1.1');
 } catch(err) {
-  console.log("Debugger attach failed : ", err);
+  console.log('Debugger attach failed : ', err);
 };
 
 win.webContents.debugger.on('detach', (event, reason) => {
-  console.log("Debugger detached due to : ", reason);
+  console.log('Debugger detached due to : ', reason);
 });
 
 win.webContents.debugger.on('message', (event, method, params) => {
-  if (method === "Network.requestWillBeSent") {
-    if (params.request.url === "https://www.github.com")
+  if (method === 'Network.requestWillBeSent') {
+    if (params.request.url === 'https://www.github.com')
       win.webContents.debugger.detach();
   }
 })
 
-win.webContents.debugger.sendCommand("Network.enable");
+win.webContents.debugger.sendCommand('Network.enable');
 ```
 
 #### `webContents.debugger.attach([protocolVersion])`

docs/api/web-frame.md

@@ -58,7 +58,7 @@ whether the word passed is correctly spelled.
 An example of using [node-spellchecker][spellchecker] as provider:
 
 ```javascript
-webFrame.setSpellCheckProvider("en-US", true, {
+webFrame.setSpellCheckProvider('en-US', true, {
   spellCheck: function(text) {
     return !(require('spellchecker').isMisspelled(text));
   }

docs/api/web-view-tag.md

@@ -213,7 +213,7 @@ The `webview` tag has the following methods:
 **Example**
 
 ```javascript
-webview.addEventListener("dom-ready", () => {
+webview.addEventListener('dom-ready', () => {
   webview.openDevTools();
 });
 ```
@@ -622,10 +622,10 @@ Fired when a result is available for
 ```javascript
 webview.addEventListener('found-in-page', function(e) {
   if (e.result.finalUpdate)
-    webview.stopFindInPage("keepSelection");
+    webview.stopFindInPage('keepSelection');
 });
 
-const rquestId = webview.findInPage("test");
+const rquestId = webview.findInPage('test');
 ```
 
 ### Event: 'new-window'

docs/tutorial/desktop-environment-integration.md

@@ -219,15 +219,15 @@ let win = new BrowserWindow({
 
 win.setThumbarButtons([
   {
-    tooltip: "button1",
+    tooltip: 'button1',
     icon: path.join(__dirname, 'button1.png'),
-    click: () => { console.log("button2 clicked"); }
+    click: () => { console.log('button2 clicked'); }
   },
   {
-    tooltip: "button2",
+    tooltip: 'button2',
     icon: path.join(__dirname, 'button2.png'),
     flags:['enabled', 'dismissonclick'],
-    click: () => { console.log("button2 clicked."); }
+    click: () => { console.log('button2 clicked.'); }
   }
 ]);
 ```