vue-cli创建项目时由esLint校验导致报错或警告的问题及解决

vue-cli创建项目时由esLint校验导致报错或警告

eslint语法限制项目报错解决

vue-cli创建项目时由esLint校验导致报错或警告

vue-cli创建项目后编写代码控制台一片黄

但不影响代码执行

但是看着就是很不爽啊

到网上搜索了一下这个问题，想起来初始化项目时安装了esLint校验工具

嗯，我看到了很多办法都是下面这样的

1、因为你设置了eslint，如果你不想有规范的js代码，可以重新初始化关掉eslint。

Use ESLint to lint your code? (Y/n) 这一步选no

在bulid/webpack.base.conf.js里面有配置如下：

module: {
rules: [
...(config.dev.useEslint ? [createLintingRule()] : []),

点进config.dev.useEslint，发现在config/index.js里配置

useEslint: true, // 改为false即可。

2、万能方法，就是在报错的JS文件中第一行写上

/* eslint-disable */
Use /* eslint-disable */ to ignore all warnings in a file.

简单粗暴有效率

but 本着既然人家说我错了这个肯定是不好的啊我得改这种良好觉悟

我觉得吧，还是应该直面错误勇于改正

so 针对所有的报错信息，进行了一一修改，果然长知识啊，哈哈哈那我按照他的规范来写我岂不是enenenhahaha

我这是又在做什么梦[○･Д´･ ○]

进入正题，将遇到的报错信息整理了一下

1.ESLint：Strings must use single quote

字符串必须要用单引号引起来

2.Expected indentation of 2 spaces but found 4

eslint不喜欢tab缩进哦，缩进使用两个空格就可以，好的，我现在已经开始要改了~

如果实在是改不了呢，可以↓↓

修改eslint 配置文件 .eslintrc.js

rules: {
   ...
    // 缩进
    // 'indent': 2,
    // 'indent': [2, 2, {"SwitchCase": 1}],
    "indent": [1, 2],
   ...
 }

3.Missing space before value for key 'components’

这个就是强制属性值前也就是冒号后，习惯性的加一个空格，就可以避免这歌报错提示啦~

4.Newline required at end of file but not found

单文件组件最后的</style>后面要换一行，且只能一行，多了也会报错

其他的就不一一列举的，但是还有些要注意的

{}，
{}
↓
{}, {
}

注意：逗号后面也要加一个空格

好啦，以上就是我对这个规范的一些小小心得，后面再碰到再补充~

eslint语法限制项目报错解决

自己从网上找来个实战项目，npm install之后，启动项目，出现了下面这么多的警告和报错，一脸懵逼：

Windows PowerShell
版权所有 (C) Microsoft Corporation。保留所有权利。
PS F:\vue.news-master> npm run dev
> vue.news@2.0.0 dev F:\vue.news-master
> webpack-dev-server --open --inline --progress --config build/webpack.dev.conf.js
 95% emitting
 WARNING  Compiled with 2 warnings                                                                                                                         15:04:08
  ✘  http://eslint.org/docs/rules/indent                   Expected indentation of 0 spaces but found 1
  src\App.vue:15:1
   /*全局引入VueAwesomeSwiper轮播图插件*/
   ^
  ✘  http://eslint.org/docs/rules/spaced-comment           Expected exception block, space or tab after '/*' in comment
  src\App.vue:15:2
   /*全局引入VueAwesomeSwiper轮播图插件*/
    ^
  ✘  http://eslint.org/docs/rules/spaced-comment           Expected space or tab before '*/' in comment
  src\App.vue:15:2
   /*全局引入VueAwesomeSwiper轮播图插件*/
    ^
  ✘  http://eslint.org/docs/rules/no-unused-vars           'VueAwesomeSwiper' is defined but never used
  src\App.vue:16:8
  import VueAwesomeSwiper from 'vue-awesome-swiper';
          ^
  ✘  http://eslint.org/docs/rules/semi                     Extra semicolon
  src\App.vue:16:50
  import VueAwesomeSwiper from 'vue-awesome-swiper';
                                                    ^
  ✘  http://eslint.org/docs/rules/semi                     Extra semicolon
  src\App.vue:17:36
  import 'swiper/dist/css/swiper.css';//这里注意具体看使用的版本是否需要引入样式，以及具体位置。
                                      ^
  ✘  http://eslint.org/docs/rules/spaced-comment           Expected space or tab after '//' in comment
  src\App.vue:17:37
  import 'swiper/dist/css/swiper.css';//这里注意具体看使用的版本是否需要引入样式，以及具体位置。
                                       ^
  ✘  http://eslint.org/docs/rules/no-multiple-empty-lines  More than 1 blank line not allowed
  src\App.vue:18:1
   ^
  ✘  http://eslint.org/docs/rules/semi                     Extra semicolon
  src\App.vue:20:47
  import AppHead from '@/components/public/Head';
                                                 ^
  ✘  http://eslint.org/docs/rules/semi                     Extra semicolon
  src\App.vue:21:47
  import AppMenu from '@/components/public/Menu';
                                                 ^
  ✘  http://eslint.org/docs/rules/semi                     Extra semicolon
  src\App.vue:22:45
  import AppNav from '@/components/public/Nav';
                                               ^
  ✘  http://eslint.org/docs/rules/semi                     Extra semicolon
  src\App.vue:23:47
  import AppFoot from '@/components/public/Foot';
                                                 ^
✘ 12 problems (12 errors, 0 warnings)
Errors:
  6  http://eslint.org/docs/rules/semi
  3  http://eslint.org/docs/rules/spaced-comment
  1  http://eslint.org/docs/rules/no-multiple-empty-lines
  1  http://eslint.org/docs/rules/no-unused-vars
  1  http://eslint.org/docs/rules/indent
  ✘  http://eslint.org/docs/rules/semi            Extra semicolon
  src\components\Select.vue:40:36
  import 'swiper/dist/css/swiper.css';这里注意具体看使用的版本是否需要引入样式，以及具体位置。
                                      ^
  ✘  http://eslint.org/docs/rules/spaced-comment  Expected space or tab after '///' in comment
  src\components\Select.vue:40:37
  import 'swiper/dist/css/swiper.css';这里注意具体看使用的版本是否需要引入样式，以及具体位置。
                                       ^
  ✘  http://eslint.org/docs/rules/semi            Extra semicolon
  src\components\Select.vue:41:57
  import { swiper, swiperSlide } from 'vue-awesome-swiper';
                                                           ^
  ✘  http://eslint.org/docs/rules/semi            Extra semicolon
  src\components\Select.vue:43:58
  import { mapState, mapMutations, mapActions } from 'vuex';
                                                            ^
✘ 4 problems (4 errors, 0 warnings)
Errors:
  3  http://eslint.org/docs/rules/semi
  1  http://eslint.org/docs/rules/spaced-comment
You may use special comments to disable some warnings.
Use // eslint-disable-next-line to ignore the next line.
Use /* eslint-disable */ to ignore all warnings in a file.
 WAIT  Compiling...                                                                                                                                        15:05:01
 95% emitting
 WARNING  Compiled with 2 warnings                                                                                                                         15:05:02
  ✘  http://eslint.org/docs/rules/no-unused-vars           'VueAwesomeSwiper' is defined but never used
  src\App.vue:16:8
  import VueAwesomeSwiper from 'vue-awesome-swiper';
          ^
  ✘  http://eslint.org/docs/rules/semi                     Extra semicolon
  src\App.vue:16:50
  import VueAwesomeSwiper from 'vue-awesome-swiper';
                                                    ^
  ✘  http://eslint.org/docs/rules/semi                     Extra semicolon
  src\App.vue:17:36
  import 'swiper/dist/css/swiper.css';//这里注意具体看使用的版本是否需要引入样式，以及具体位置。
                                      ^
  ✘  http://eslint.org/docs/rules/spaced-comment           Expected space or tab after '//' in comment
  src\App.vue:17:37
  import 'swiper/dist/css/swiper.css';//这里注意具体看使用的版本是否需要引入样式，以及具体位置。
                                       ^
  ✘  http://eslint.org/docs/rules/no-multiple-empty-lines  More than 1 blank line not allowed
  src\App.vue:18:1
   ^
  ✘  http://eslint.org/docs/rules/semi                     Extra semicolon
  src\App.vue:20:47
  import AppHead from '@/components/public/Head';
                                                 ^
  ✘  http://eslint.org/docs/rules/semi                     Extra semicolon
  src\App.vue:21:47
  import AppMenu from '@/components/public/Menu';
                                                 ^
  ✘  http://eslint.org/docs/rules/semi                     Extra semicolon
  src\App.vue:22:45
  import AppNav from '@/components/public/Nav';
                                               ^
  ✘  http://eslint.org/docs/rules/semi                     Extra semicolon
  src\App.vue:23:47
  import AppFoot from '@/components/public/Foot';
                                                 ^
✘ 9 problems (9 errors, 0 warnings)
Errors:
  6  http://eslint.org/docs/rules/semi
  1  http://eslint.org/docs/rules/no-multiple-empty-lines
  1  http://eslint.org/docs/rules/spaced-comment
  1  http://eslint.org/docs/rules/no-unused-vars
  ✘  http://eslint.org/docs/rules/semi            Extra semicolon
  src\components\Select.vue:40:36
  import 'swiper/dist/css/swiper.css';这里注意具体看使用的版本是否需要引入样式，以及具体位置。
                                      ^
  ✘  http://eslint.org/docs/rules/spaced-comment  Expected space or tab after '///' in comment
  src\components\Select.vue:40:37
  import 'swiper/dist/css/swiper.css';这里注意具体看使用的版本是否需要引入样式，以及具体位置。
                                       ^
  ✘  http://eslint.org/docs/rules/semi            Extra semicolon
  src\components\Select.vue:41:57
  import { swiper, swiperSlide } from 'vue-awesome-swiper';
                                                           ^
  ✘  http://eslint.org/docs/rules/semi            Extra semicolon
  src\components\Select.vue:43:58
  import { mapState, mapMutations, mapActions } from 'vuex';
                                                            ^
✘ 4 problems (4 errors, 0 warnings)
Errors:
  3  http://eslint.org/docs/rules/semi
  1  http://eslint.org/docs/rules/spaced-comment
You may use special comments to disable some warnings.
Use // eslint-disable-next-line to ignore the next line.
Use /* eslint-disable */ to ignore all warnings in a file.
 WAIT  Compiling...                                                                                                                                        15:05:05
 95% emitting
 WARNING  Compiled with 2 warnings                                                                                                                         15:05:06
  ✘  http://eslint.org/docs/rules/no-unused-vars           'VueAwesomeSwiper' is defined but never used
  src\App.vue:16:8
  import VueAwesomeSwiper from 'vue-awesome-swiper';
          ^
  ✘  http://eslint.org/docs/rules/semi                     Extra semicolon
  src\App.vue:16:50
  import VueAwesomeSwiper from 'vue-awesome-swiper';
                                                    ^
  ✘  http://eslint.org/docs/rules/semi                     Extra semicolon
  src\App.vue:17:36
  import 'swiper/dist/css/swiper.css';//这里注意具体看使用的版本是否需要引入样式，以及具体位置。
                                      ^
  ✘  http://eslint.org/docs/rules/spaced-comment           Expected space or tab after '//' in comment
  src\App.vue:17:37
  import 'swiper/dist/css/swiper.css';//这里注意具体看使用的版本是否需要引入样式，以及具体位置。
                                       ^
  ✘  http://eslint.org/docs/rules/no-multiple-empty-lines  More than 1 blank line not allowed
  src\App.vue:18:1
   ^
  ✘  http://eslint.org/docs/rules/semi                     Extra semicolon
  src\App.vue:20:47
  import AppHead from '@/components/public/Head';
                                                 ^
  ✘  http://eslint.org/docs/rules/semi                     Extra semicolon
  src\App.vue:21:47
  import AppMenu from '@/components/public/Menu';
                                                 ^
  ✘  http://eslint.org/docs/rules/semi                     Extra semicolon
  src\App.vue:22:45
  import AppNav from '@/components/public/Nav';
                                               ^
  ✘  http://eslint.org/docs/rules/semi                     Extra semicolon
  src\App.vue:23:47
  import AppFoot from '@/components/public/Foot';
                                                 ^
✘ 9 problems (9 errors, 0 warnings)
Errors:
  6  http://eslint.org/docs/rules/semi
  1  http://eslint.org/docs/rules/no-multiple-empty-lines
  1  http://eslint.org/docs/rules/spaced-comment
  1  http://eslint.org/docs/rules/no-unused-vars
  ✘  http://eslint.org/docs/rules/semi            Extra semicolon
  src\components\Select.vue:40:36
  import 'swiper/dist/css/swiper.css';这里注意具体看使用的版本是否需要引入样式，以及具体位置。
                                      ^
  ✘  http://eslint.org/docs/rules/spaced-comment  Expected space or tab after '///' in comment
  src\components\Select.vue:40:37
  import 'swiper/dist/css/swiper.css';这里注意具体看使用的版本是否需要引入样式，以及具体位置。
                                       ^
  ✘  http://eslint.org/docs/rules/semi            Extra semicolon
  src\components\Select.vue:41:57
  import { swiper, swiperSlide } from 'vue-awesome-swiper';
                                                           ^
  ✘  http://eslint.org/docs/rules/semi            Extra semicolon
  src\components\Select.vue:43:58
  import { mapState, mapMutations, mapActions } from 'vuex';
                                                            ^
✘ 4 problems (4 errors, 0 warnings)
Errors:
  3  http://eslint.org/docs/rules/semi
  1  http://eslint.org/docs/rules/spaced-comment
You may use special comments to disable some warnings.
Use // eslint-disable-next-line to ignore the next line.
Use /* eslint-disable */ to ignore all warnings in a file.
 WAIT  Compiling...                                                                                                                                        15:05:07
 95% emitting
 WARNING  Compiled with 2 warnings                                                                                                                         15:05:08
  ✘  http://eslint.org/docs/rules/no-unused-vars           'VueAwesomeSwiper' is defined but never used
  src\App.vue:16:8
  import VueAwesomeSwiper from 'vue-awesome-swiper';
          ^
  ✘  http://eslint.org/docs/rules/semi                     Extra semicolon
  src\App.vue:16:50
  import VueAwesomeSwiper from 'vue-awesome-swiper';
                                                    ^
  ✘  http://eslint.org/docs/rules/semi                     Extra semicolon
  src\App.vue:17:36
  import 'swiper/dist/css/swiper.css';//这里注意具体看使用的版本是否需要引入样式，以及具体位置。
                                      ^
  ✘  http://eslint.org/docs/rules/spaced-comment           Expected space or tab after '//' in comment
  src\App.vue:17:37
  import 'swiper/dist/css/swiper.css';//这里注意具体看使用的版本是否需要引入样式，以及具体位置。
                                       ^
  ✘  http://eslint.org/docs/rules/no-multiple-empty-lines  More than 1 blank line not allowed
  src\App.vue:18:1
   ^
  ✘  http://eslint.org/docs/rules/semi                     Extra semicolon
  src\App.vue:20:47
  import AppHead from '@/components/public/Head';
                                                 ^
  ✘  http://eslint.org/docs/rules/semi                     Extra semicolon
  src\App.vue:21:47
  import AppMenu from '@/components/public/Menu';
                                                 ^
  ✘  http://eslint.org/docs/rules/semi                     Extra semicolon
  src\App.vue:22:45
  import AppNav from '@/components/public/Nav';
                                               ^
  ✘  http://eslint.org/docs/rules/semi                     Extra semicolon
  src\App.vue:23:47
  import AppFoot from '@/components/public/Foot';
                                                 ^
✘ 9 problems (9 errors, 0 warnings)
Errors:
  6  http://eslint.org/docs/rules/semi
  1  http://eslint.org/docs/rules/no-multiple-empty-lines
  1  http://eslint.org/docs/rules/spaced-comment
  1  http://eslint.org/docs/rules/no-unused-vars
  ✘  http://eslint.org/docs/rules/semi            Extra semicolon
  src\components\Select.vue:40:36
  import 'swiper/dist/css/swiper.css';这里注意具体看使用的版本是否需要引入样式，以及具体位置。
                                      ^
  ✘  http://eslint.org/docs/rules/spaced-comment  Expected space or tab after '///' in comment
  src\components\Select.vue:40:37
  import 'swiper/dist/css/swiper.css';这里注意具体看使用的版本是否需要引入样式，以及具体位置。
                                       ^
  ✘  http://eslint.org/docs/rules/semi            Extra semicolon
  src\components\Select.vue:41:57
  import { swiper, swiperSlide } from 'vue-awesome-swiper';
                                                           ^
  ✘  http://eslint.org/docs/rules/semi            Extra semicolon
  src\components\Select.vue:43:58
  import { mapState, mapMutations, mapActions } from 'vuex';
                                                            ^
✘ 4 problems (4 errors, 0 warnings)
Errors:
  3  http://eslint.org/docs/rules/semi
  1  http://eslint.org/docs/rules/spaced-comment
You may use special comments to disable some warnings.
Use // eslint-disable-next-line to ignore the next line.
Use /* eslint-disable */ to ignore all warnings in a file.
 WAIT  Compiling...                                                                                                                                        15:05:09
 95% emitting
 WARNING  Compiled with 2 warnings                                                                                                                         15:05:09
  ✘  http://eslint.org/docs/rules/no-unused-vars           'VueAwesomeSwiper' is defined but never used
  src\App.vue:16:8
  import VueAwesomeSwiper from 'vue-awesome-swiper';
          ^
  ✘  http://eslint.org/docs/rules/semi                     Extra semicolon
  src\App.vue:16:50
  import VueAwesomeSwiper from 'vue-awesome-swiper';
                                                    ^
  ✘  http://eslint.org/docs/rules/semi                     Extra semicolon
  src\App.vue:17:36
  import 'swiper/dist/css/swiper.css';//这里注意具体看使用的版本是否需要引入样式，以及具体位置。
                                      ^
  ✘  http://eslint.org/docs/rules/spaced-comment           Expected space or tab after '//' in comment
  src\App.vue:17:37
  import 'swiper/dist/css/swiper.css';//这里注意具体看使用的版本是否需要引入样式，以及具体位置。
                                       ^
  ✘  http://eslint.org/docs/rules/no-multiple-empty-lines  More than 1 blank line not allowed
  src\App.vue:18:1
   ^
  ✘  http://eslint.org/docs/rules/semi                     Extra semicolon
  src\App.vue:20:47
  import AppHead from '@/components/public/Head';
                                                 ^
  ✘  http://eslint.org/docs/rules/semi                     Extra semicolon
  src\App.vue:21:47
  import AppMenu from '@/components/public/Menu';
                                                 ^
  ✘  http://eslint.org/docs/rules/semi                     Extra semicolon
  src\App.vue:22:45
  import AppNav from '@/components/public/Nav';
                                               ^
  ✘  http://eslint.org/docs/rules/semi                     Extra semicolon
  src\App.vue:23:47
  import AppFoot from '@/components/public/Foot';
                                                 ^
✘ 9 problems (9 errors, 0 warnings)
Errors:
  6  http://eslint.org/docs/rules/semi
  1  http://eslint.org/docs/rules/no-multiple-empty-lines
  1  http://eslint.org/docs/rules/spaced-comment
  1  http://eslint.org/docs/rules/no-unused-vars
  ✘  http://eslint.org/docs/rules/semi            Extra semicolon
  src\components\Select.vue:40:36
  import 'swiper/dist/css/swiper.css';这里注意具体看使用的版本是否需要引入样式，以及具体位置。
                                      ^
  ✘  http://eslint.org/docs/rules/spaced-comment  Expected space or tab after '///' in comment
  src\components\Select.vue:40:37
  import 'swiper/dist/css/swiper.css';这里注意具体看使用的版本是否需要引入样式，以及具体位置。
                                       ^
  ✘  http://eslint.org/docs/rules/semi            Extra semicolon
  src\components\Select.vue:41:57
  import { swiper, swiperSlide } from 'vue-awesome-swiper';
                                                           ^
  ✘  http://eslint.org/docs/rules/semi            Extra semicolon
  src\components\Select.vue:43:58
  import { mapState, mapMutations, mapActions } from 'vuex';
                                                            ^
✘ 4 problems (4 errors, 0 warnings)
Errors:
  3  http://eslint.org/docs/rules/semi
  1  http://eslint.org/docs/rules/spaced-comment
You may use special comments to disable some warnings.
Use // eslint-disable-next-line to ignore the next line.
Use /* eslint-disable */ to ignore all warnings in a file.

经过百度查询，原来eslint是一个语法检查工具，但是限制很严格，在我的vue文件里面很多空格都会导致红线(红线可以关闭提示)，虽然可以关闭，但是在编译的时候老是会跳出来，所以能关闭是最好的了。

关闭方法：在build/webpack.base.conf.js文件中，注释或者删除掉：module->rules中有关eslint的规则：

module: {
  rules: [
    //...(config.dev.useEslint ? [createLintingRule()] : []), // 注释或者删除
    {
      test: /\.vue$/,
      loader: 'vue-loader',
      options: vueLoaderConfig
    },
    ...
    }
  ]
}

然后再重新运行一下npm run dev或者构建命令 npm run build就可以啦。

以上为个人经验，希望能给大家一个参考，也希望大家多多支持易知道(ezd.cc)。