使用VS Code调试JavaScript代码

安装Debugger for Chrome或者Debugger for Firefox插件

按下图步骤操作，选择你想使用的浏览器
选择完成后他会生成一个launch.json文件
添加

"file": "${workspaceFolder}/index.html"

完整的launch.json为：

{
  "version": "0.2.0",
  "configurations": [
    {
      "type": "chrome",
      "request": "launch",
      "name": "Launch Chrome against localhost",
      "url": "http://localhost:8080",
      "webRoot": "${workspaceFolder}",
      "file": "${workspaceFolder}/index.html"
    }
  ]
}

然后就可以启动调试了