先看看 官方教程–使用 VS Code 调试网页版游戏

一、安装插件

Debugger for Chrome已弃用

• 安装 JavaScript Debugger (Nightly) 插件替代，其他步骤完全一样。

二、通过cocos creator打开任意js脚本，按F5，选择Web 应用（Chrome）

自动生成 launch.json如下

{
    // 使用 IntelliSense 了解相关属性。 
    // 悬停以查看现有属性的描述。
    // 欲了解更多信息，请访问: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
            "type": "chrome",
            "request": "launch",
            "name": "Launch Chrome against localhost",
            "url": "http://localhost:8080",
            "webRoot": "${workspaceFolder}"
        }
    ]
}

三、修改url端口成7456

launch.json如下

{
    // 使用 IntelliSense 了解相关属性。 
    // 悬停以查看现有属性的描述。
    // 欲了解更多信息，请访问: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
            "type": "chrome",
            "request": "launch",
            "name": "Launch Chrome against localhost",
            "url": "http://localhost:7456",
            "webRoot": "${workspaceFolder}"
        }
    ]
}

四、按F5进行调试

正常情况下应该可以调试了。

其他错误

1.找不到浏览器

Unable to launch browser: “Unable to find an installation of the browser on your system. Try installing it, or providing an absolute path to the browser in the “runtimeExecutable” in your launch.json.”

查看谷歌浏览器安装路径，修改launch.json如下

{
    // 使用 IntelliSense 了解相关属性。 
    // 悬停以查看现有属性的描述。
    // 欲了解更多信息，请访问: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
            "type": "chrome",
            "request": "launch",
            "name": "Launch Chrome against localhost",
            "url": "http://localhost:7456",
            "runtimeExecutable": "C:/Users/Administrator/AppData/Local/MyChrome/Chrome/Application/chrone.exe",
            "webRoot": "${workspaceFolder}"
        }
    ]
}

runtimeExecutable 就是谷歌浏览器所在路径。

2. 断点异常（打不上断点）

This breakpoint was initially set in:
E:\Project\xxx\assets\scripts\AppStart.js line 22 column 1
❓ We couldn’t find a corresponding source location, but found some other files with the same name:
E:\Project\xxx\assets\scripts\AppStart.js
e:\Project\xxx \assets\scripts\AppStart.js
You may need to adjust the webRoot in your launch.json if you’re building from a subfolder, or tweak your sourceMapPathOverrides.

这类问题，找了很久的解决方案，后面稀里糊涂解决了我个人的问题。

修改launch.json如下： （仅供参考）

{
    // 使用 IntelliSense 了解相关属性。 
    // 悬停以查看现有属性的描述。
    // 欲了解更多信息，请访问: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
            "type": "chrome",
            "request": "launch",
            "name": "Launch Chrome against localhost",
            "url": "http://localhost:7456",
            "runtimeExecutable": "C:/Users/Administrator/AppData/Local/MyChrome/Chrome/Application/chrone.exe",
            "webRoot": "${workspaceFolder}/scripts"
        }
    ]
}