docs: handle opening links in the default browser in main.js (#39379)

docs: handle opening links in the default browser in the main process

docs/fiddles/native-ui/external-links-file-manager/main.js

@@ -1,5 +1,5 @@
 // Modules to control application life and create native browser window
-const { app, BrowserWindow } = require('electron')
+const { app, BrowserWindow, shell } = require('electron')
 
 // Keep a global reference of the window object, if you don't, the window will
 // be closed automatically when the JavaScript object is garbage collected.
@@ -29,6 +29,12 @@ function createWindow () {
     // when you should delete the corresponding element.
     mainWindow = null
   })
+
+  // Open external links in the default browser
+  mainWindow.webContents.on('will-navigate', (event, url) => {
+    event.preventDefault()
+    shell.openExternal(url)
+  })
 }
 
 // This method will be called when Electron has finished

docs/fiddles/native-ui/external-links-file-manager/renderer.js

@@ -11,15 +11,3 @@ fileManagerBtn.addEventListener('click', (event) => {
 exLinksBtn.addEventListener('click', (event) => {
   shell.openExternal('https://electronjs.org')
 })
-
-const links = document.querySelectorAll('a[href]')
-
-for (const link of links) {
-  const url = link.getAttribute('href')
-  if (url.indexOf('http') === 0) {
-    link.addEventListener('click', (e) => {
-      e.preventDefault()
-      shell.openExternal(url)
-    })
-  }
-}