为什么我不能用 Webpack 编译 SASS? [英] Why am I not being able to compile SASS with Webpack?

问题描述

我的 Webpack 配置中有以下模块:

I have the following modules in my Webpack config:

module: {
    preLoaders: [
      {
        test: /.vue$/,
        loader: 'eslint',
        include: projectRoot,
        exclude: /node_modules/
      },
      {
        test: /.js$/,
        loader: 'eslint',
        include: projectRoot,
        exclude: /node_modules/
      }
    ],
    loaders: [
      {
        test: /.vue$/,
        loader: 'vue'
      },
      {
        test: /.js$/,
        loader: 'babel',
        include: projectRoot,
        exclude: /node_modules/
      },
      {
        test: /.json$/,
        loader: 'json'
      },
      {
        test: /.html$/,
        loader: 'vue-html'
      },
      {
        test: /.(png|jpe?g|gif|svg)(?.*)?$/,
        loader: 'url',
        query: {
          limit: 10000,
          name: utils.assetsPath('img/[name].[hash:7].[ext]')
        }
      },
      {
        test: /.scss$/,
        loaders: ['style', 'css', 'sass']
      },
      {
        test: /.(woff2?|eot|ttf|otf)(?.*)?$/,
        loader: 'url',
        query: {
          limit: 10000,
          name: utils.assetsPath('fonts/[name].[hash:7].[ext]')
        }
      }
    ]
  },

你可以看到我正在使用 sass-loader，对于 *.scss 文件，我定义了这个管道:['style', 'css', 'sass'].

You can see that I am using sass-loader, and for *.scss files I am defining this pipeline: ['style', 'css', 'sass'].

然后我有我的 scss 文件:

Then I have my scss file:

html {
  height: 100%;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
}

(...)

最后，我有了导入该 scss 文件的 HTML 页面(在 vue.js 的 VUE 文件中):

Finally I have my HTML page (in a VUE file from vue.js) which imports that scss file:

<script>

require('./styles/main.scss')

(...)

</script>

但不知何故，我在启动项目时收到此错误:

ERROR in ./~/css-loader!./~/sass-loader!./~/style-loader!./~/css-loader!./~/sass-loader!./src/styles/main.scss
Module build failed:
html {
^
      Invalid CSS after "...load the styles": expected 1 selector or at-rule, was "var content = requi"
      in /Users/td/uprank/src/styles/main.scss (line 1, column 1)
 @ ./src/styles/main.scss 4:14-247 13:2-17:4 14:20-253

为什么管道出错了?(看起来 webpack 正在尝试处理 ['css', 'sass', 'style', 'css', 'sass'] 而不仅仅是 ['style', 'css', 'sass'] 在模块中配置.

Why is it getting the pipeline wrong? (It appears webpack is trying to process ['css', 'sass', 'style', 'css', 'sass'] instead of just ['style', 'css', 'sass'] as configured in modules.

我做错了什么?

谢谢！

完整示例项目的链接:https://dl.dropboxusercontent.com/u/1066659/dummy.zip

推荐答案

发生这种情况的原因，是因为 Vue 自动为 CSS、SASS/SCSS、Stylus 生成加载器配置.

The reason this is happening, is because Vue automatically generates loader configurations for CSS, SASS/SCSS, Stylus.

(参见 projectRoot/build/utils.js 行 ~10 到 ~50)

(See projectRoot/build/utils.js lines ~10 through ~50)

所以您看到错误是因为您有一个 webpack 加载器尝试导入文件，然后 Vue 尝试导入(已加载)文件.所以你可以把你的加载器链看作 sass ->css ->风格 ->sass ->css ->vue风格

So you're seeing the error because you have a webpack loader that is attempting to import the file and then Vue is attempting to import the (already loaded) file. So you can think of your loader chain as sass -> css -> style -> sass -> css -> vue-style

为了解决这个问题，你必须去掉你添加的加载器:

In order to resolve this issue you have to get rid of the loader that you added:

{
  test: /.scss$/,
  loaders: ['style', 'css', 'sass']
},

并且只依赖提供的加载器.

and just rely on the provided loader.

您可以通过以下两种方式之一加载样式表:

You can load your stylesheet in one of two ways:

注意:您必须使用 scss 而不是 sass，因为 sass 将尝试使用缩进语法而不是括号语法.

NOTE: You MUST use scss instead of sass, as sass will attempt to parse your stylesheet using the indented syntax instead of the bracket syntax.

1:

<style lang="scss">
  @import './styles/main.scss
</style>

2:

<style src="./styles/main.scss"></style>

这两个都将导入样式表，后者只会阻止您向组件添加任何其他样式.

Both of these will import the stylesheet, the latter just prevents you from adding any additional styling to the component.

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