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Use vscode and es6 to write nodejs server-side debugging configuration

小云云
Release: 2018-02-07 11:37:47
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前端的小伙伴们在babel等的加持下,已经可以愉快的使用es6来写代码了。然后对于服务端的nodejs就有点坑爹了,虽然原生支持了es6,但是只是部分支持,一些不支持的特性(比如module)使用了就会报错,所以如果想使用完整的es6来写服务端nodejs,我们还是离不开babel。

本文主要和大家介绍使用vscode+es6写nodejs服务端调试配置,小编觉得挺不错的,现在分享给大家,也给大家做个参考。一起跟随小编过来看看吧,希望能帮助到大家。

下面介绍一下在vscode中使用es6写nodejs的配置方法。

1.首先在根目录下建立.babelrc文件,写入babel配置,我的配置如下,记得npm安装babel及你需要的presets或者plugin。


{
 "presets": [
 "es2015",
 "stage-3"
 ]
}
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2.其实此时已经可以通过babel-node来执行你的es6代码了。


babel-node src/index.js
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然而这样的话,vscode里面是无法调试的。所以我们得换个思路,首先将源码使用babel转换,然后执行转换后的代码,附加一份sourcemap就好了。

3.package.json中增加build命令,使用babel转换es6代码。


 "scripts": {
 ......
 "build": "babel src -d dist --source-maps"
 }
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4.创建一个npm task(vscode概念),用来执行npm run build


{
 // See https://go.microsoft.com/fwlink/?LinkId=733558
 // for the documentation about the tasks.json format
 "version": "0.1.0",
 "command": "npm", //执行npm命令
 "isShellCommand": true,
 "showOutput": "always",
 "suppressTaskName": true,
 "tasks": [
 {
  "taskName": "build", //task名称
  "args": [ //npm run build
  "run",
  "build"
  ],
  "isBuildCommand": true
 }
 ]
}
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该文件在根目录.vscode目录下,名字是tasks.json,如果没有可以自己创建一个。

5.在vscode的调试配置文件中(.vscode -> launch.json),进行如下配置


{
 // Use IntelliSense to learn about possible Node.js debug attributes.
 // Hover to view descriptions of existing attributes.
 // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
 "version": "0.2.0",
 "configurations": [
 {
  "type": "node",
  "request": "launch",
  "name": "启动程序",
  "program": "${workspaceRoot}\\src\\index.js",
  "sourceMaps": true, //sourcemap打开
  "outFiles": [
  "${workspaceRoot}\\dist\\index.js"
  ], //源映射,指定实际执行文件
  "preLaunchTask": "build" //首先执行build task
 },
 {
  "type": "node",
  "request": "attach",
  "name": "附加到端口",
  "address": "localhost",
  "port": 5858
 }
 ]
}
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主要干了这几件事:

  • 开启source-map,以便追踪到es6源码

  • 运行前先执行build,编译es6源码

  • 执行和调试编译后的代码

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