1.在VS Code中安装Debugger for Firefox插件

2.下载安Firefox Developer Edition

3. 创建launch.json

编辑并保存launch.json

{// Use IntelliSense to learn about possible attributes.// Hover to view descriptions of existing attributes.// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387"version": "0.2.0","configurations": [{"name": "Launch MyDraw.html","type": "firefox","request": "launch","reAttach": true,"file": "${workspaceFolder}/MyDraw.html"}]
}

4.开始调试

5.设置断点开始调试，html中的javasript的代码也可以调试