CSS Loader 已使用与 API 架构不匹配的选项对象进行初始化

Question

生产构建失败并出现以下错误：

ValidationError: Invalid options object. CSS Loader has been initialised using an options object that does not match the API schema.
 - options has an unknown property 'minimize'. These properties are valid:
   object { url?, import?, modules?, sourceMap?, importLoaders?, localsConvention?, onlyLocals? }
    at validate (/Users/username/Sites/projectname/node_modules/css-loader/node_modules/schema-utils/dist/validate.js:85:11)
    at Object.loader (/Users/username/Sites/projectname/node_modules/css-loader/dist/index.js:34:28)

使用这个 webpack 模板：http ://vuejs-templates.github.io/webpack/ ，更新到 Webpack 4 并面临构建问题，package.json：

{
  "name": "projectname",
  "private": true,
  "scripts": {
    "dev": "webpack-dev-server --inline --progress --config webpack.config.js --port 3000 --hot",
    "start": "npm run dev",
    "build": "cross-env NODE_ENV=production webpack --progress --hide-modules"
  },
  "dependencies": {
    "@vue/cli-service": "^3.2.0",
    "axios": "^0.18.0",
    "babel-polyfill": "^6.26.0",
    "cross-env": "^5.2.0",
    "css-loader": "^3.2.1",
    "jquery": "^3.3.1",
    "moment": "^2.22.2",
    "style-loader": "^1.0.1",
    "swiper": "^4.5.0",
    "v-tabs-router": "^1.4.0",
    "vee-validate": "^2.1.0-beta.9",
    "vue": "^2.5.2",
    "vue-awesome-swiper": "^3.1.3",
    "vue-backtotop": "^1.6.1",
    "vue-carousel": "^0.18.0",
    "vue-cleave-component": "^2.1.2",
    "vue-instant": "^1.0.2",
    "vue-jsonp": "^0.1.8",
    "vue-magic-line": "^0.2.1",
    "vue-masked-input": "^0.5.2",
    "vue-resource": "^1.5.1",
    "vue-router": "^3.0.2",
    "vue-select": "^2.5.1",
    "vue-slider-component": "^2.8.0",
    "vue-smooth-scroll": "^1.0.13",
    "vuejs-datepicker": "^1.5.3",
    "vuelidate": "^0.7.4",
    "vuex": "^3.0.1"
  },
  "devDependencies": {
    "autoprefixer": "^7.1.2",
    "babel-core": "^6.22.1",
    "babel-helper-vue-jsx-merge-props": "^2.0.3",
    "babel-loader": "^7.1.1",
    "babel-plugin-syntax-jsx": "^6.18.0",
    "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",
    "chalk": "^2.0.1",
    "copy-webpack-plugin": "^4.0.1",
    "extract-text-webpack-plugin": "^3.0.0",
    "file-loader": "^5.0.2",
    "friendly-errors-webpack-plugin": "^1.6.1",
    "html-webpack-plugin": "^3.2.0",
    "node-notifier": "^5.1.2",
    "node-sass": "^4.13.0",
    "optimize-css-assets-webpack-plugin": "^5.0.3",
    "ora": "^1.2.0",
    "portfinder": "^1.0.13",
    "postcss-import": "^12.0.1",
    "postcss-loader": "^3.0.0",
    "postcss-url": "^8.0.0",
    "rimraf": "^2.6.0",
    "sass-loader": "^8.0.0",
    "semver": "^5.3.0",
    "shelljs": "^0.7.6",
    "uglifyjs-webpack-plugin": "^1.1.1",
    "url-loader": "^1.1.2",
    "vue-loader": "^14.2.2",
    "vue-resource": "^1.5.1",
    "vue-style-loader": "^4.1.2",
    "vue-template-compiler": "^2.5.2",
    "webpack": "^4.41.2",
    "webpack-cli": "^3.3.10",
    "webpack-dev-server": "^3.9.0"
  },
  "engines": {
    "node": ">= 6.0.0",
    "npm": ">= 3.0.0"
  },
  "browserslist": [
    "> 1%",
    "last 2 versions",
    "not ie <= 8"
  ]
}

我已经检查grep -rl 'minimize' .了项目根目录，但没有找到任何相关选项。与..

Answer 1

我喜欢 webpack 中 postcss 的这个问题。原因是旧版本使用语法：

    {
        loader: 'postcss-loader',
        options: {
            plugins: postCSSPlugins
        }
    }

虽然选项中的新版本在插件之前使用嵌套的 postcssOptions：

    {
        loader: 'postcss-loader',
        options: {
            postcssOptions: {
                plugins: postCSSPlugins
            }
        }
    }

Answer 2

我在更新到 webpack 4 并使用 MiniCssExtractPlugin 时也遇到了这个错误

我能够通过使用旧版本的 ccs-loader 消除错误并成功构建

这些版本对我有用

 "devDependencies": {
   "css-loader": "1.0.1",

或者

   "css-loader": "^0.28.0",

css-loader 2* 和 3* 给了我错误。

测试发布后更新：使用旧版本的 css-loader 会导致在浏览器中渲染网站时 css 无法加载。所以这似乎不是一个解决方案。

Answer 3

我运行yarn upgrade --latest命令后遇到了同样的问题。

它将 sass-loader 版本从 7.1.0 更改为 8.0.0。之后得到同样的错误。

sass-loader 选项可能发生变化，因此发生此错误。您可以检查版本：https://github.com/webpack-contrib/sass-loader/releases和更新的选项https://github.com/webpack-contrib/sass-loader

尝试删除/更改 sass-loader 选项，这可以帮助您解决问题。

希望这能有所帮助，如果您能分享 webpack.config.js 文件，那就太好了。

干杯~