使用webpack mini css extract插件时出错
当我运行npm运行构建失败时,引用mini css extract插件:使用webpack mini css extract插件时出错,webpack,mini-css-extract-plugin,Webpack,Mini Css Extract Plugin,当我运行npm运行构建失败时,引用mini css extract插件: C:\dev\udemy-restfull\webpack\node_modules\mini-css-extract-plugin\dist\index.js:76 const resource = this._identifier.split('!').pop(); ^ TypeError: Cannot read propert
C:\dev\udemy-restfull\webpack\node_modules\mini-css-extract-plugin\dist\index.js:76
const resource = this._identifier.split('!').pop();
^
TypeError: Cannot read property 'split' of undefined
我试图搜索错误,但只知道它取决于加载程序的执行顺序,所以我只留下MiniCssExtractPlugin.loader和css加载程序,但错误仍然存在
我浏览了文档,得到了简化的设置,同样的错误也发生了
我已经在index.js中加载了引导,所以我删除了它,认为这可能是原因,也不好
你能帮我吗
这是我的webpack.config.js文件:
const path = require('path');
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
module.exports = {
entry: ["@babel/polyfill", "./src/index.js"],
output: {
path: path.resolve(__dirname, 'dist'),
filename: 'bundle.js'
},
plugins: [
new MiniCssExtractPlugin({
filename: 'style.css'
})
],
module: {
rules: [
{
test: /\.css$/,
use: [
{ loader: MiniCssExtractPlugin.loader }, // style-loader
{ loader: "file-loader" }
]
},
{
test: /\.(scss)$/,
use: [
{
loader: MiniCssExtractPlugin.loader, // inject CSS to page / style-loader
},
{
loader: 'css-loader', // translates CSS into CommonJS modules
},
{
loader: 'postcss-loader', // Run post css actions
options: {
plugins: function () { // post css plugins, can be exported to postcss.config.js
return [
require('precss'),
require('autoprefixer')
];
}
}
},
{
loader: 'sass-loader' // compiles Sass to CSS
}]
},
]
},
devServer: {
contentBase: './dist',
port: 9000
}
};
这是我的package.json文件:
{
"name": "app-webpack",
"version": "1.0.0",
"description": "teste com webpack",
"main": "index.js",
"scripts": {
"dev": "webpack --mode development --watch",
"build": "webpack --mode production",
"start": "webpack-dev-server --mode development"
},
"author": "Johnatan Lopes",
"license": "ISC",
"devDependencies": {
"@babel/cli": "^7.1.0",
"@babel/core": "^7.1.0",
"@babel/preset-env": "^7.1.0",
"autoprefixer": "^9.1.5",
"babel-loader": "^8.0.4",
"css-loader": "^1.0.0",
"file-loader": "^2.0.0",
"mini-css-extract-plugin": "^0.4.3",
"node-sass": "^4.9.3",
"postcss-loader": "^3.0.0",
"precss": "^3.1.2",
"sass-loader": "^7.1.0",
"style-loader": "^0.23.0",
"webpack": "^4.20.2",
"webpack-cli": "^3.1.1",
"webpack-dev-server": "^3.1.9"
},
"dependencies": {
"@babel/polyfill": "^7.0.0",
"bootstrap": "^4.1.3",
"jquery": "^3.3.1",
"popper.js": "^1.14.4"
}
}
mini-css-extract-plugin
的加载程序只将css-loader
的输出作为其输入。CSS文件的规则应如下所示:
{
test: /\.css$/,
use: [
MiniCssExtractPlugin.loader,
"css-loader"
]
}
这样,正确格式的CSS将被传递到
MiniCssExtractPlugin.loader
,以便插件从您的包中提取它。这是此错误消息的第一个google结果之一-因此,即使此修复与原始提问者的配置无关,这可能对将来的人们有所帮助
对我来说,修复方法是从options对象(或options.modules对象,如果您使用的是css loader v3.x),删除exportOnlyLocals/exportLocals(取决于您的css loader版本)。如果您使用预渲染,这将产生副作用,我相信这是我个人不熟悉的SSR
还要确保在css加载器之前调用MiniCssExtractPlugin,正如Adam已经提到的那样。作为插件尝试。。。。。。。新的MiniCssExtractPlugin({filename:[name].css”,chunkFilename:[id].css“}),……当前仅当您不尝试配置
'css-loader'
时,此功能才起作用。如果您试图对加载程序使用选项属性,则这不会解决您的问题。此处似乎已确认:。看起来早期版本的css加载器没有这个问题。另一个相关链接:。