我繼承了一個舊存盤庫，我正在嘗試更新 Node 以及一些依賴項。該 repo 使用 webpack 3.6，我將其升級到 webpack 5.70.0。
運行時出現以下錯誤npm run build：
> node scripts/build.js
Creating an optimized production build...
Failed to compile.
Invalid configuration object. Webpack has been initialized using a configuration object that does not match the API schema.
- configuration.module.rules[1] should be one of these:
["..." | object { assert?, compiler?, dependency?, descriptionData?, enforce?, exclude?, generator?, include?, issuer?, issuerLayer?, layer?, loader?, mimetype?, oneOf?, options?, parser?, realResource?, resolve?, resource?, resourceFragment?, resourceQuery?, rules?, scheme?, sideEffects?, test?, type?, use? }, ...]
-> A rule.
Details:
* configuration.module.rules[1].oneOf[2].loader should be a non-empty string.
-> A loader request.
這是我的webpack.config
const path = require('path');
const webpack = require('webpack');
const autoprefixer = require('autoprefixer');
const eslintFormatter = require('react-dev-utils/eslintFormatter');
const ExtractTextPlugin = require('extract-text-webpack-plugin');
const CopyWebpackPlugin = require("copy-webpack-plugin");
const CaseSensitivePathsPlugin = require('case-sensitive-paths-webpack-plugin');
const UglifyJsPlugin = require("uglifyjs-webpack-plugin");
const resolveApp = relativePath => path.resolve(__dirname, relativePath);
// Note: defined here because it will be used more than once.
const cssFilename = '/css/[name].css';
const paths = {
appEntry: resolveApp('web/static'),
appAssets: resolveApp('web/static/assets'),
appOutput: resolveApp('priv/static')
}
module.exports = {
bail: true,
devtool: 'source-map',
entry: {
index: [paths.appEntry '/js/index.js', paths.appEntry '/css/globals.scss'],
ads: paths.appEntry '/js/ads.js'
},
output: {
path: paths.appOutput,
filename: 'js/[name].js',
pathinfo: true,
// Point sourcemap entries to original disk location (format as URL on Windows)
devtoolModuleFilenameTemplate: info =>
path.resolve(info.absoluteResourcePath).replace(/\\/g, '/'),
},
resolve: {
modules: [ "node_modules", __dirname "/web/static/js" ],
extensions: ['.web.js', '.js', '.json', '.web.jsx', '.jsx', '.scss'],
},
optimization: {
minimizer: [
new UglifyJsPlugin({
// compress: {
// warnings: false,
// // Disabled because of an issue with Uglify breaking seemingly valid code:
// // https://github.com/facebookincubator/create-react-app/issues/2376
// // Pending further investigation:
// // https://github.com/mishoo/UglifyJS2/issues/2011
// comparisons: false,
// },
// output: {
// comments: false,
// // Turned on because emoji and regex is not minified properly using default
// // https://github.com/facebookincubator/create-react-app/issues/2488
// ascii_only: true,
// },
sourceMap: true,
}),
]
},
module: {
strictExportPresence: true,
rules: [
// First, run the linter.
// It's important to do this before Babel processes the JS.
{
test: /\.(js|jsx)$/,
enforce: 'pre',
use: [
{
options: {
eslintPath: require.resolve('eslint'),
},
loader: require.resolve('eslint-loader'),
},
],
include: paths.appEntry,
},
{
// "oneOf" will traverse all following loaders until one will
// match the requirements. When no loader matches it will fall
// back to the "file" loader at the end of the loader list.
oneOf: [
// "url" loader works like "file" loader except that it embeds assets
// smaller than specified limit in bytes as data URLs to avoid requests.
// A missing `test` is equivalent to a match.
{
test: [/\.bmp$/, /\.gif$/, /\.jpe?g$/, /\.png$/],
loader: require.resolve('url-loader'),
options: {
limit: 10000,
name: '/images/[name].[hash:8].[ext]',
},
},
// Process JS with Babel.
{
test: /\.(js|jsx)$/,
include: paths.appEntry,
loader: require.resolve('babel-loader'),
options: {
compact: true
},
},
// "postcss" loader applies autoprefixer to our CSS.
// "css" loader resolves paths in CSS and adds assets as dependencies.
// "style" loader turns CSS into JS modules that inject <style> tags.
// In production, we use a plugin to extract that CSS to a file, but
// in development "style" loader enables hot editing of CSS.
{
test: /\.s?css$/,
loader: ExtractTextPlugin.extract(
Object.assign(
{
fallback: require.resolve('style-loader'),
use: [
{
loader: require.resolve('css-loader'),
options: {
modules: true,
importLoaders: 1,
minimize: true,
localIdentName: '[name]__[local]___[hash:base64:5]'
}
},
{
loader: require.resolve('postcss-loader'),
options: {
// Necessary for external CSS imports to work
// https://github.com/facebookincubator/create-react-app/issues/2677
ident: 'postcss',
plugins: () => [
require('postcss-flexbugs-fixes'),
autoprefixer({
browsers: [
'> 1%',
'last 8 versions',
'Firefox ESR',
'not ie < 9', // React doesn't support IE8 anyway
],
flexbox: 'no-2009',
}),
],
},
},
require.resolve('sass-loader')
],
},
{ publicPath: Array(cssFilename.split('/').length).join('../') }
)
),
},
// "file" loader makes sure those assets get served by WebpackDevServer.
// When you `import` an asset, you get its (virtual) filename.
// In production, they would get copied to the `build` folder.
// This loader doesn't use a "test" so it will catch all modules
// that fall through the other loaders.
{
// Exclude `js` files to keep "css" loader working as it injects
// it's runtime that would otherwise processed through "file" loader.
// Also exclude `html` and `json` extensions so they get processed
// by webpacks internal loaders.
exclude: [/\.js$/, /\.html$/, /\.json$/],
loader: require.resolve('file-loader'),
options: {
name: '/images/[name].[hash:8].[ext]',
},
},
],
},
// ** STOP ** Are you adding a new loader?
// Make sure to add the new loader(s) before the "file" loader.
],
},
plugins: [
new webpack.DefinePlugin({
'process.env': {
NODE_ENV: JSON.stringify('production')
}
}),
// Minify the code.
// new webpack.optimize.UglifyJsPlugin({
// compress: {
// warnings: false,
// // Disabled because of an issue with Uglify breaking seemingly valid code:
// // https://github.com/facebookincubator/create-react-app/issues/2376
// // Pending further investigation:
// // https://github.com/mishoo/UglifyJS2/issues/2011
// comparisons: false,
// },
// output: {
// comments: false,
// // Turned on because emoji and regex is not minified properly using default
// // https://github.com/facebookincubator/create-react-app/issues/2488
// ascii_only: true,
// },
// sourceMap: true,
// }),
// Note: this won't work without ExtractTextPlugin.extract(..) in `loaders`.
new ExtractTextPlugin({
filename: cssFilename,
}),
new CopyWebpackPlugin({patterns:[{ from: paths.appAssets }]}),
new webpack.IgnorePlugin({
resourceRegExp: /^\.\/locale$/,
contextRegExp: /moment$/
})
],
// Some libraries import Node modules but don't use them in the browser.
// Tell Webpack to provide empty mocks for them so importing them works.
// node: {
// dgram: 'empty',
// fs: 'empty',
// net: 'empty',
// tls: 'empty',
// child_process: 'empty',
// },
}
該錯誤是指此規則，但我只是不確定問題出在哪里。
{
test: /\.s?css$/,
loader: ExtractTextPlugin.extract(
Object.assign(
{
fallback: require.resolve('style-loader'),
use: [
{
loader: require.resolve('css-loader'),
options: {
modules: true,
importLoaders: 1,
minimize: true,
localIdentName: '[name]__[local]___[hash:base64:5]'
}
},
{
loader: require.resolve('postcss-loader'),
options: {
// Necessary for external CSS imports to work
// https://github.com/facebookincubator/create-react-app/issues/2677
ident: 'postcss',
plugins: () => [
require('postcss-flexbugs-fixes'),
autoprefixer({
browsers: [
'> 1%',
'last 8 versions',
'Firefox ESR',
'not ie < 9', // React doesn't support IE8 anyway
],
flexbox: 'no-2009',
}),
],
},
},
require.resolve('sass-loader')
],
},
{ publicPath: Array(cssFilename.split('/').length).join('../') }
)
),
}
任何幫助是極大的贊賞！
uj5u.com熱心網友回復：
該錯誤表明“loader”的值應該是一個非空字串。因此，如果您查看“loader”的值，您會看到：
loader: ExtractTextPlugin.extract(
我敢打賭，以上內容不會回傳字串。在查看 的檔案時ExtractTextPlugin，它說要像這樣使用它：
use: ExtractTextPlugin.extract(
轉載請註明出處，本文鏈接：https://www.uj5u.com/qiye/474854.html