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                # 編寫Electron程序 [TOC] ## 主進程 我們可以理解`package.json`中定義的入口文件就是主進程,那一般一個程序只有一個主進程,而我們可以利用一個主進程,打開多個子窗口. ### Electron的運行流程 * 1.讀取package.json的中的入口文件,這里我們是main.js * 2.main.js 主進程中創建渲染進程 * 3.讀取應用頁面的布局和樣式 * 4.使用IPC在主進程執行任務并獲取信息 ## 渲染進程 一個主進程可以控制多個渲染進程,可以把main.js看成主進程,我們寫的html部分看成渲染進程 ![](https://img.kancloud.cn/a6/26/a6269f49b6779e5fb82acc53624d6d30_750x500.png) 創建renderer文件夾,新建renderer.js ~~~ //使用node下的fs模塊 var fs = require('fs'); window.onload = function () { var btn = this.document.querySelector('#btn') var mybaby = this.document.querySelector('#content') btn.onclick = function () { fs.readFile('hello.txt', (err, data) => { mybaby.innerHTML = data }) } } ~~~ 修改index.html ~~~ <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Hello World!</title> <meta http-equiv="Content-Security-Policy" content="script-src 'self' 'unsafe-inline';" /> </head> <body style="background: white;"> <h1>Hello World!</h1> <p> We are using node <script>document.write(process.versions.node)</script>, Chrome <script>document.write(process.versions.chrome)</script>, and Electron <script>document.write(process.versions.electron)</script>. </p> <Button id="btn">Hello</Button> <div id="content"></div> <script src="renderer/renderer.js"></script> </body> </html> ~~~ 選擇View下Reload重新加載 ![](https://img.kancloud.cn/fb/fe/fbfe4d75cc8d07e6e3948ebe6cdfcde2_786x592.png)
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