Renderer Process API
Renderer API 主要包括 remote、Browser window proxy、desktop Capture
Renderer Process API
remote
Browser Window Proxy
desktop Capture
1、remote (服务端对象)
1.1 index.html
<!DOCTYPE html>
<html><head><meta charset="UTF-8"><meta http-equiv="Content-Security-Policy" content="script-src 'self' 'unsafe-inline'"><title>Hello World!</title></head><body><h1>Hello World!</h1><button type="button" name="button" id="test-button">Fullscreen</button><br><!-- All of the Node.js APIs are available in this renderer process. -->We are using Node.js <strong><script>document.write( process.versions.node)</script></strong>,and Electron <strong><script>document.write( process.versions.electron )</script></strong>.<script>// You can also require other files to run in this processrequire('./renderer.js')</script></body>
</html>
1.2 renderer.js
// This file is required by the index.html file and will
// be executed in the renderer process for that window.
// All of the Node.js APIs are available in this process.const remote = require('electron').remoteconst { app, dialog, BrowserWindow } = remoteconst button = document.getElementById('test-button')button.addEventListener('click', e => {// dialog.showMessageBox({ message: 'Dialog invoked from Renderer process' })// let secWin = new BrowserWindow({// width: 400, height: 350// })// secWin.loadFile('index.html')// console.log( remote.getGlobal('myglob') )// app.quit()let win = remote.getCurrentWindow()win.maximize()})
1.3 main.js
// Modules
const {app, BrowserWindow} = require('electron')global['myglob'] = 'A var set in main.js'// 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.
let mainWindow// Create a new BrowserWindow when `app` is ready
function createWindow () {mainWindow = new BrowserWindow({width: 1000, height: 800,webPreferences: { nodeIntegration: true }})// Load index.html into the new BrowserWindowmainWindow.loadFile('index.html')// Open DevTools - Remove for PRODUCTION!mainWindow.webContents.openDevTools();// Listen for window being closedmainWindow.on('closed', () => {mainWindow = null})
}// Electron `app` is ready
app.on('ready', createWindow)// Quit when all windows are closed - (Not macOS - Darwin)
app.on('window-all-closed', () => {if (process.platform !== 'darwin') app.quit()
})// When app icon is clicked and app is running, (macOS) recreate the BrowserWindow
app.on('activate', () => {if (mainWindow === null) createWindow()
})
2、Browser Window Proxy （浏览器窗口代理）
<!DOCTYPE html>
<html><head><meta charset="UTF-8"><meta http-equiv="Content-Security-Policy" content="script-src 'self' 'unsafe-inline'"><title>Hello World!</title></head><body><h1>Hello World!</h1><h3><a href="#" οnclick="newWin()">New Window</a></h3><h3><a href="#" οnclick="closeWin()">Close Window</a></h3><h3><a href="#" οnclick="styleWin()">Bad Fonts</a></h3><script>let winconst newWin = () => {win = window.open('https://electronjs.org', '_blank', 'width=500,height=450,alwaysOnTop=1')}const closeWin = () => {win.close()}const styleWin = () => {win.eval("document.getElementsByTagName('body')[0].style.fontFamily = 'Comic Sans MS'")}</script></body>
</html>
3、webFrame
<!DOCTYPE html>
<html><head><meta charset="UTF-8"><meta http-equiv="Content-Security-Policy" content="script-src 'self' 'unsafe-inline'"><title>Hello World!</title></head><body><h1>Hello World!</h1><img src="https://placekitten.com/450/300" alt=""><br><button οnclick="zoomUp()">Increase Zoom</button><button οnclick="zoomDown()">Decrease Zoom</button><button οnclick="zoomReset()">Reset Zoom</button><script>const { webFrame } = require('electron')const zoomUp = () => {webFrame.setZoomLevel( webFrame.getZoomLevel() + 1 )}const zoomDown = () => {webFrame.setZoomLevel( webFrame.getZoomLevel() - 1 )}const zoomReset = () => {webFrame.setZoomLevel( 1 )}console.log( webFrame.getResourceUsage() )</script></body>
</html>
4、desktopCapturer（桌面快照）
4.1 index.html
<!DOCTYPE html>
<html><head><meta charset="UTF-8"><meta http-equiv="Content-Security-Policy" content="script-src 'self' 'unsafe-inline'"><title>Hello World!</title></head><body><h1>Hello World!</h1><img width="100%" src="" id="screenshot"><br><button id="screenshot-button">Get Screenshot</button><script>// You can also require other files to run in this processrequire('./renderer.js')</script></body>
</html>
4.2 renderer.js
const { desktopCapturer } = require('electron')document.getElementById('screenshot-button').addEventListener('click', () => {desktopCapturer.getSources({ types:['window'], thumbnailSize: {width:1920, height:1080} }, (error, sources) => {console.log(sources)document.getElementById('screenshot').src = sources[0].thumbnail.toDataURL()})})