text: 'use strict';
  
  const OFF = 0;
  const WARNING = 1;
  const ERROR = 2;
  
  module.exports = {
    extends: 'airbnb',
    env: {
      browser: true,
      node: true,
      es6: true,
      mocha: true
    },
    globals: {
      assert: true
    },
    parser: 'babel-eslint',
    plugins: ['react', 'babel', 'json', 'flowtype'],
    parserOptions: {
      ecmaVersion: 6,
      sourceType: 'module',
      ecmaFeatures: {
        jsx: true,
        experimentalObjectRestSpread: true
      }
    },
    rules: {
      indent: [ERROR, 2, { SwitchCase: 1 }], //规定代码的缩进方式：2个空格
      camelcase: ERROR, //强制驼峰法命名
      curly: ERROR, //必须使用 if(){} 中的{}
      eqeqeq: ERROR, //必须使用全等
      'brace-style': [ERROR, '1tbs'], //大括号风格
      quotes: [ERROR, 'single'], //引号类型
      semi: [ERROR, 'always'], //语句强制分号结尾
      'space-infix-ops': ERROR, //中缀操作符周围要不要有空格
      'no-param-reassign': OFF, //不允许对函数的形参进行赋值
      'prefer-spread': ERROR, //首选展开运算
      'comma-dangle': OFF, //不允许或强制在对象字面量或者数组属性的结尾使用逗号
      'padded-blocks': OFF, //规定代码块前后是否要加空行
      'prefer-const': OFF,
      'no-multi-spaces': ERROR,
      'no-var': OFF,
      'one-var': OFF,
      'class-methods-use-this': WARNING,
      'no-unused-expressions': [ERROR, { allowShortCircuit: true }],
      'arrow-parens': [ERROR, 'as-needed'],
      'no-mixed-operators': OFF,
      /**
       * https://github.com/airbnb/javascript/tree/master/react
       */
      'react/prefer-es6-class': [WARNING, 'always'], //使用 class extends React.Component
      'react/jsx-pascal-case': ERROR, //骆驼式命名
      'react/jsx-closing-bracket-location': ERROR, //JSX语法缩进/格式
      'react/jsx-curly-spacing': ERROR, //JSX {} 引用括号里两边加空格
      'react/jsx-boolean-value': [OFF, 'always'], //如果属性值为 true, 可以直接省略
      'jsx-quotes': [ERROR, 'prefer-double'], //JSX属性值总是使用双引号(")
      'react/no-string-refs': ERROR, //Refs里使用回调函数
      'react/jsx-wrap-multilines': ERROR, //多行的JSX标签写在 ()里
      'react/self-closing-comp': ERROR, //没有子元素的标签来说总是自己关闭标签
      'react/jsx-no-bind': ERROR, //当在 render() 里使用事件处理方法时，提前在构造函数里把 this 绑定上去
      'react/no-is-mounted': ERROR, //不要再使用 isMounted
      'react/prop-types': [ERROR, { ignore: ['children', 'className', 'style'] }],
      'jsx-a11y/href-no-hash': OFF,
      'jsx-a11y/label-has-for': OFF,
      'react/jsx-filename-extension': OFF,
      'react/prefer-stateless-function': OFF,
      'react/require-default-props': OFF,
  
      /**
       * Flowtype
       */
      'flowtype/define-flow-type': ERROR,
      'flowtype/require-valid-file-annotation': OFF,
      'flowtype/require-parameter-type': OFF,
      'flowtype/require-return-type': OFF,
      'flowtype/space-after-type-colon': OFF,
      'flowtype/space-before-type-colon': OFF,
      'flowtype/type-id-match': OFF,
      'flowtype/use-flow-type': ERROR
    }
  };
  