Eslint

Eslint

eslint

eslint是什么

插件化的JS代码检测工具

为什么需要

JS是弱类型语言，开发过程中容易出错。Eslint可以在编码中发现问题而不是执行时。

怎么用

初始化

1. 安装
   npm install eslint
2. 设置lint规则
   1. 新建一个.eslintrc文件，手写配置项
      直接在 package.json 文件里的 eslintConfig 字段指定配置
   2. 输入init命令，选择相关配置项后自动生成配置文件

	//选择若干条件，生成.eslintrc.js文件
	./node_modules/.bin/eslint --init

具体需要选择的配置项内容

>? How would you like to use ESLint? To check syntax, find problems, and enforce code style
>? What type of modules does your project use? JavaScript modules (import/export)
>? Which framework does your project use? Vue.js
>? Does your project use TypeScript? No
>? Where does your code run? (Press  to select,  to toggle all,  to invert selection)Browser
>? How would you like to define a style for your project? Use a popular style guide
?? Which style guide do you want to follow? Airbnb (https://github.com/airbnb/javascript)
>? What format do you want your config file to be in? JavaScript

启动

1. 只是在项目里安装了

$ ./node_modules/.bin/eslint yourfile.js

./node_modules/.bin/目录里面放置了整个项目可执行的二进制文件
2. 全局安装了eslint

$ eslint yourfile.js