在vue-cli中，使用 sass-resources-loader 实现全局变量、方法注入

使用vue-cli 建立项目

package.json

"devDependencies": {
  "autoprefixer": "^7.1.2",
  "babel-core": "^6.22.1",
  "babel-eslint": "^7.1.1",
  "babel-helper-vue-jsx-merge-props": "^2.0.3",
  "babel-jest": "^21.0.2",
  "babel-loader": "^7.1.1",
  "babel-plugin-dynamic-import-node": "^1.2.0",
  "babel-plugin-syntax-jsx": "^6.18.0",
  "babel-plugin-transform-es2015-modules-commonjs": "^6.26.0",
  "babel-plugin-transform-runtime": "^6.22.0",
  "babel-plugin-transform-vue-jsx": "^3.5.0",
  "babel-preset-env": "^1.3.2",
  "babel-preset-stage-2": "^6.22.0",
  "babel-register": "^6.22.0",
  "chalk": "^2.0.1",
  "chromedriver": "^2.27.2",
  "copy-webpack-plugin": "^4.0.1",
  "cross-spawn": "^5.0.1",
  "css-loader": "^0.28.0",
  "eslint": "^3.19.0",
  "eslint-config-standard": "^10.2.1",
  "eslint-friendly-formatter": "^3.0.0",
  "eslint-loader": "^1.7.1",
  "eslint-plugin-html": "^3.0.0",
  "eslint-plugin-import": "^2.7.0",
  "eslint-plugin-node": "^5.2.0",
  "eslint-plugin-promise": "^3.4.0",
  "eslint-plugin-standard": "^3.0.1",
  "extract-text-webpack-plugin": "^3.0.0",
  "file-loader": "^1.1.4",
  "friendly-errors-webpack-plugin": "^1.6.1",
  "html-webpack-plugin": "^2.30.1",
  "jest": "^21.2.0",
  "jest-serializer-vue": "^0.3.0",
  "nightwatch": "^0.9.12",
  "node-notifier": "^5.1.2",
  "node-sass": "^4.7.2",
  "optimize-css-assets-webpack-plugin": "^3.2.0",
  "ora": "^1.2.0",
  "portfinder": "^1.0.13",
  "postcss-import": "^11.0.0",
  "postcss-loader": "^2.0.8",
  "rimraf": "^2.6.0",
  "sass-loader": "^6.0.6",
  "sass-resources-loader": "^1.3.1",
  "selenium-server": "^3.0.1",
  "semver": "^5.3.0",
  "shelljs": "^0.7.6",
  "style-loader": "^0.19.1",
  "uglifyjs-webpack-plugin": "^1.1.1",
  "url-loader": "^0.5.8",
  "vue-jest": "^1.0.2",
  "vue-loader": "^13.3.0",
  "vue-style-loader": "^3.0.1",
  "vue-template-compiler": "^2.5.2",
  "webpack": "^3.6.0",
  "webpack-bundle-analyzer": "^2.9.0",
  "webpack-dev-server": "^2.9.1",
  "webpack-merge": "^4.1.0"
}

安装好sass之后，想要在组件中使用全局变量

sass-resources-loader 安装方法

步骤1：npm i sass-resources-loader --save-dev

步骤2：修改build/utils.js

在以下代码的 上面

// https://vue-loader.vuejs.org/en/configurations/extract-css.html

return {
  css: generateLoaders(),
  postcss: generateLoaders(),
  less: generateLoaders('less'),
  sass: generateLoaders('sass"',{ indentedSyntax: true }),
  scss: generateLoaders('sass'),
  stylus: generateLoaders('stylus'),
  styl: generateLoaders('stylus')
}

添加

// =========
  // SASS 配置
  // =========
  function resolveResouce(name) {
    return path.resolve(__dirname, '../src/assets/sass/' + name);
  }

  function generateSassResourceLoader() {
    let loaders = [
      cssLoader,
      // 'postcss-loader',
      {
        loader: 'sass-loader',
        options: {
          indentedSyntax: true
        }
      },
      {
        loader: 'sass-resources-loader',
        options: {
          // it need a absolute path
          resources: resolveResouce('var.sass')
        }
      }
    ];
    if (options.extract) {
      return ExtractTextPlugin.extract({
        use: loaders,
        fallback: 'vue-style-loader'
      })
    } else {
      return ['vue-style-loader'].concat(loaders)
    }
  }　　

其中resolveResouce方法中的路径需改成你自己项目的sass路径，resources: resolveResouce('var.sass')中的文件名，需改为你想要全局注入的那个sass文件名

然后引用以上方法，修改

return {
    css: generateLoaders(),
    postcss: generateLoaders(),
    less: generateLoaders('less'),
    sass: generateLoaders('sass"',{ indentedSyntax: true }),
    scss: generateLoaders('sass'),
    stylus: generateLoaders('stylus'),
    styl: generateLoaders('stylus')
  }

　　为

return {
    css: generateLoaders(),
    postcss: generateLoaders(),
    less: generateLoaders('less'),
    //sass: generateLoaders('sass"',{ indentedSyntax: true }),
    //scss: generateLoaders('sass'),
    sass: generateSassResourceLoader(),
    scss: generateSassResourceLoader(),
    stylus: generateLoaders('stylus'),
    styl: generateLoaders('stylus')
  }