Postcss warning:
1、You should write display: flex by final spec instead of display: box
解决方案：去除display: box
2、Second Autoprefixer control comment was ignored. Autoprefixer applies control comment to whole block, not to next rules.
解决方案：
/* autoprefixer: off*/····/* autoprefixer: on*/换成 /*! autoprefixer: ignore next */
Eslint error
1、error: Unreachable code (no-unreachable)
return、throw后面的语句：
2、'xxx' is assigned a value but never used (no-unused-vars)
赋值了但没有引用
3、'xxx' is defined but never used (no-unused-vars)
没有引用的import
4、The "xxx" component has been registered but not used (vue/no-unused-components)
注册了组件，但没有用到
5、Duplicate key 'xxx' (no-dupe-keys)
data重复声明
6、Identifier 'xx_x' is not in camel case (camelcase)
js里变量没有使用驼峰
7、'xxx' is not defined (no-undef)
引用了未定义的变量等
8、Irregular whitespace not allowed (no-irregular-whitespace)
空格问题
9、Mixed spaces and tabs (no-mixed-spaces-and-tabs)
tab与空格混用
10、Unnecessary escape character (no-useless-escape) :\h :/
多余的转义字符
11、 Expected the Promise rejection reason to be an Error (prefer-promise-reject-errors) ：reject()
promise的reject需要指定error
12、Expected to return a value in "xxx" computed property (vue/return-in-computed-property)
计算属性存在没有返回的场景
13、Type of the default value for 'xxx' prop must be a function (vue/require-valid-default-prop)
props对象的默认值必须使用工厂方法声明
14、'xxx' was used before it was defined (no-use-before-define)
实例： let v = (v = this.memberId ? '^' + 'Y' : '^' + 'N')
15、Expected error to be handled (handle-callback-err)
异常没有处理
16、Parsing error: control-character-in-input-stream (vue/no-parsing-error)
单行注释//位置不对
17、Expected an assignment or function call and instead saw an expression (no-unused-expressions)
期望一个赋值或函数调用，却看到一个表达式
18、 Closing curly brace does not appear on the same line as the subsequent block (brace-style)
右大括号与下一个块不在同一行
19、 Unexpected literal in error position of callback (standard/no-callback-literal)
callback(true/false/1)在ES6里是不被允许的，https://github.com/standard/standard/issues/623
20、 'xxx' is already defined (no-redeclare)
var 变量引起的
21、 Unexpected trailing comma (comma-dangle)
多了一个逗号
22、 Parsing error: x-invalid-end-tag (vue/no-parsing-error)
自闭合标签用了end标签，例：</img>
23、 Elements in iteration expect to have 'v-bind:key' directives (vue/require-v-for-key)
使用v-for时，没有设置key
24、Expected a 'break' statement before 'case' (no-fallthrough)
case前需要设置break
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