Invalid CSS after " ": expected 1 selector or at-rule, was "{"

Question

I am trying out Vue with SASS but I run into a problem ben using npm run build. I use webpack sass-loader. Can anyone help me out here? I suspect the problem is somewhere in my webpack config, but I can not find the problem.

Error output:

ERROR in ./node_modules/css-loader?minimize!./node_modules/vue-loader/lib/style-compiler?{"vue":true,"id":"data-v-42a765dc","scoped":true,"hasInlineConfig":false}!./node_modules/sass-loader/lib/loader.js?indentedSyntax!./node_modules/vue-loader/lib/selector.js?type=styles&index=0!./src/components/Header.vue
Module build failed: 
<template>
^
      Invalid CSS after " ": expected 1 selector or at-rule, was "{"
      in /Users/rafrasenberg/webconexus/src/wcxwebsite/src/components/Header.vue (line 1, column 1)
 @ ./node_modules/vue-style-loader!./node_modules/css-loader?minimize!./node_modules/vue-loader/lib/style-compiler?{"vue":true,"id":"data-v-42a765dc","scoped":true,"hasInlineConfig":false}!./node_modules/sass-loader/lib/loader.js?indentedSyntax!./node_modules/vue-loader/lib/selector.js?type=styles&index=0!./src/components/Header.vue 4:14-355
 @ ./src/components/Header.vue
 @ ./node_modules/babel-loader/lib!./node_modules/vue-loader/lib/selector.js?type=script&index=0!./src/App.vue
 @ ./src/App.vue
 @ ./src/main.js

The header.vue file:

<template>
  <header>
    <div id="logo">UA</div>
    <nav>
      <ul>
        <router-link tag='li' :to="{ name: 'home'}">
          <a>Home</a>
        </router-link>
        <router-link tag='li' :to="{ name: 'cutecat'}">
          <a>CuteCat</a>
        </router-link>
      </ul>
    </nav>
  </header>
</template>

<script>
export default{
  data () {
    return {
}
  }
}
</script>

<style scoped lang="sass">
  @import './../assets/styles/colors'
header
    display: flex
    justify-content: space-around
    align-items: center
    background-color: $green
    border-bottom: 2px solid darken($green, 30%)
    color: $white
    div#logo
      font-size: 200%
      width: 33%
    nav
      flex-grow: 2
      ul
        padding: 0
        display: flex
        justify-content: space-around
        list-style: none
        a
          text-decoration: none
          color: $white
</style>

And now my webpack.config.js:

var path = require('path')
var webpack = require('webpack')
var BundleTracker = require('webpack-bundle-tracker')
var WriteFilePlugin = require('write-file-webpack-plugin')

module.exports = {
  entry: './src/main.js',
  output: {
    path: path.resolve(__dirname, './dist'),
    filename: 'bundle.js'
  },
  plugins: [
  new BundleTracker({filename: 'webpack-stats.json'}),
  new WriteFilePlugin()
  ],
  module: {
    rules: [
      {
        test: /\.scss$/,
           use: [
               "style-loader", // creates style nodes from JS strings
               "css-loader", // translates CSS into CommonJS
               "sass-loader" // compiles Sass to CSS, using Node Sass by default
           ]
      },
      {
        test: /\.vue$/,
        loader: 'vue-loader',
      },
      {
        test: /\.js$/,
        loader: 'babel-loader',
        exclude: /node_modules/
      },
      {
        test: /\.(png|jpg|gif|svg)$/,
        loader: 'url-loader',
        options: {
          name: '[name].[ext]?[hash]'
        }
      }
    ]
  },
  resolve: {
    alias: {
      'vue$': 'vue/dist/vue.esm.js',
      '@': path.resolve('src')
    },
    extensions: ['*', '.js', '.vue', '.json']
  },
  devServer: {
    historyApiFallback: true,
    noInfo: true,
    overlay: true
  },
  performance: {
    hints: false
  },
  devtool: '#eval-source-map'
}

if (process.env.NODE_ENV === 'production') {
  module.exports.devtool = '#source-map'
  // http://vue-loader.vuejs.org/en/workflow/production.html
  module.exports.plugins = (module.exports.plugins || []).concat([
    new webpack.DefinePlugin({
      'process.env': {
        NODE_ENV: '"production"'
      }
    }),
    new webpack.optimize.UglifyJsPlugin({
      sourceMap: true,
      compress: {
        warnings: false
      }
    }),
    new webpack.LoaderOptionsPlugin({
      minimize: true
    })
  ])
}

My package.json with all my installed dependencies:

{
  "name": "wcxwebsite",
  "description": "A Vue.js project",
  "version": "1.0.0",
  "author": "webconexus <[email protected]>",
  "license": "MIT",
  "private": true,
  "scripts": {
    "dev": "cross-env NODE_ENV=development webpack-dev-server --open --hot",
    "build": "cross-env NODE_ENV=production webpack --progress --hide-modules"
  },
  "dependencies": {
    "vue": "^2.5.11"
  },
  "browserslist": [
    "> 1%",
    "last 2 versions",
    "not ie <= 8"
  ],
  "devDependencies": {
    "babel-core": "^6.26.3",
    "babel-loader": "^7.1.5",
    "babel-preset-env": "^1.7.0",
    "babel-preset-stage-3": "^6.24.1",
    "cross-env": "^5.0.5",
    "css-loader": "^0.28.11",
    "file-loader": "^1.1.4",
    "node-sass": "^4.11.0",
    "sass-loader": "^6.0.7",
    "style-loader": "^0.23.1",
    "vue-loader": "^13.0.5",
    "vue-template-compiler": "^2.4.4",
    "webpack": "^3.12.0",
    "webpack-bundle-tracker": "^0.4.2-beta",
    "webpack-dev-server": ">=3.1.11",
    "write-file-webpack-plugin": "^4.5.0"
  }
}

Who can help me out?

Answer 1

If this helps anyone, I got this error because of a wrong indent:

@import ...

  .class
  ...

When it should be:

@import ...

.class
  ...