自2天以来，我一直坚持此升级，并且取得了一些进展。 这是一个旧项目，我必须将其推进一点。
这是我的webpack.config.js文件：
const path = require('path');
const webpack = require('webpack');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const ExtractTextPlugin = require('extract-text-webpack-plugin');
const OptimizeCssAssetsPlugin = require('optimize-css-assets-webpack-plugin');
const CleanWebpackPlugin = require('clean-webpack-plugin');
//const validate = require('webpack-validator');
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
const PATHS = {
app: path.join(__dirname, 'src/js'),
build: path.join(__dirname, 'build'),
public: path.join(__dirname, 'src/public'),
assets: path.join(__dirname, 'src/assets'),
styles: [
path.join(__dirname, 'src/assets/css/bootstrap.min.css'),
path.join(__dirname, 'src/assets/css/font-awesome.min.css'),
path.join(__dirname, 'src/assets/css/bootstrap-grid-rtl.css'),
path.join(__dirname, 'src/assets/css/main.css'),
path.join(__dirname, 'src/assets/css/PrintStyle.css'),
path.join(__dirname, 'node_modules/react-dates/lib/css/_datepicker.css'),
path.join(__dirname, 'node_modules/flag-icon-css/css/flag-icon.css'),
path.join(__dirname, 'src/assets/css/react-datepicker.css'),
path.join(__dirname, 'src/assets/css/tracker.css'),
]
};
const isDebug = !process.argv.includes('--release');
module.exports = {
optimization: {
minimizer: [
new UglifyJsPlugin({
cache: true,
parallel: true,
uglifyOptions: {
compress: false,
ecma: 6,
mangle: true
},
sourceMap: true
})
],
splitChunks: {
cacheGroups: {
commons: {
test: /[\\/]node_modules[\\/]/,
name: 'vendor',
chunks: 'all'
}
}
}
},
entry: {
app: ['babel-polyfill',PATHS.app],
style: PATHS.styles
},
output: {
path: PATHS.build,
filename: 'js/[name].js',
},
resolve: {
extensions: ['', '.js', '.jsx']
},
module: {
rules: [
{
test: /\.jsx?$/,
use:
{
loader: 'babel-loader'
}
,
include: [
path.resolve(__dirname, PATHS.app),
],
query: {
cacheDirectory: isDebug,
babelrc: true,
presets: ['latest', 'react',
...isDebug ? [] : [
'react-optimize',
],
],
plugins: [
'transform-object-rest-spread',
'transform-object-assign',
[
'react-intl', {
'messagesDir': './build/messages',
'enforceDescriptions': false
}
]
]
},
},
{
test: /\.css$/,
use:
{
loader: ExtractTextPlugin.extract(
'style-loader',
`css-loader?${JSON.stringify({
importLoaders: 1,
sourceMap: true,
modules: true,
localIdentName: isDebug ? '[name]-[local]-[hash:base64:5]' : '[hash:base64:5]',
discardComments: { removeAll: true },
})}`,
'resolve-url-loader',
'postcss-loader?pack=default'
)
}
,
exclude: PATHS.styles,
},
{
test: /\.css$/,
use: [
{
loader:
ExtractTextPlugin.extract(
'style-loader',
`css-loader?${JSON.stringify({
localIdentName: isDebug ? '[name]-[local]-[hash:base64:5]' : '[hash:base64:5]',
minimize: true,
discardComments: { removeAll: true },
})}`,
'resolve-url-loader'
)
}
],
exclude: PATHS.app,
include: PATHS.styles
},
{
test: /\.sss$/,
use: [
{
loader: 'style-loader'
},
{
loader: 'css-loader'
}
]
},
{
test: /\.json$/,
use: [
{
loader: 'json-loader'
}
]
},
{
test: /\.(eot|otf|webp|svg|ttf|woff|woff2)(\?.*)?$/,
use: [
{
loader:
`file-loader?${JSON.stringify({
name: isDebug ? '/[path][name].[ext]?[hash:8]' : '/fonts/[hash:8].[ext]',
})}`
}
]
},
{
test: /\.(ico|jpg|jpeg|png|gif)(\?.*)?$/,
use: [
{
loader:
`file-loader?${JSON.stringify({
name: isDebug ? '/[path][name].[ext]?[hash:8]' : '/images/[hash:8].[ext]'
})}`
}
]
},
],
},
plugins: [
new webpack.DefinePlugin({
'process.env.NODE_ENV': isDebug ? '"development"' : '"production"',
'process.env.BROWSER': true,
__DEV__: isDebug,
}),
new ExtractTextPlugin('[name].css', {allChunks: true}),
new OptimizeCssAssetsPlugin({
cssProcessorOptions: { discardComments: {removeAll: true } },
}),
new HtmlWebpackPlugin({
title: 'GACA Portal',
template: path.join(PATHS.public, 'index.ejs'),
favicon: path.join(PATHS.assets, 'images/favicon.ico'),
}),
...isDebug? [
new webpack.HotModuleReplacementPlugin({
multiStep: true
}),
] : [
new CleanWebpackPlugin(PATHS.build, {
root: process.cwd()
}),
new webpack.optimize.OccurrenceOrderPlugin(true),
new webpack.optimize.DedupePlugin()
] //else ends
],
// Don't attempt to continue if there are any errors.
bail: !isDebug,
cache: false,
stats: {
colors: true,
reasons: isDebug,
timings: true,
},
devtool: isDebug ? 'cheap-module-source-map' : false,
devServer: {
historyApiFallback: true,
hot: true,
inline: true,
stats: 'errors-only',
port: 3000,
host: '0.0.0.0',
publicPath: '/',
contentBase: PATHS.build,
proxy: {
'/api/**': {
target: 'http://localhost:8080',
secure: false
}
}
},
/*postcss: [
require('postcss-partial-import')(),
require('postcss-url')(),
require('postcss-custom-properties')(),
require('postcss-custom-media')(),
require('postcss-media-minmax')(),
require('postcss-custom-selectors')(),
require('autoprefixer')({
browsers: [
'>1%',
'last 4 versions',
'Firefox ESR',
'not ie < 9', // React doesn't support IE8 anyway
],
})
]*/
};
现在我正在尝试npm start，但仍然出现此错误：
× ｢wds｣: Invalid configuration object. Webpack has been initialised using a configuration object that does not match the API schema.
- configuration.module.rules[2].use should be one of these:
non-empty string | function | object { ident?, loader?, options?, query? } | function | [non-empty string | function | object { ident?, loader?, options?, query? }]
-> Modifiers applied to the module when rule is matched
Details:
* configuration.module.rules[1].use should be a string.
* configuration.module.rules[1].use should be an instance of function
* configuration.module.rules[1].use.loader should be a string.
* configuration.module.rules[1].use should be an instance of function
* configuration.module.rules[1].use should be an array:
[non-empty string | function | object { ident?, loader?, options?, query? }]
* configuration.module.rules[2].use should be a string.
* configuration.module.rules[2].use should be an instance of function
* configuration.module.rules[2].use should be an object.
* configuration.module.rules[2].use should be an instance of function
* configuration.module.rules[2].use[0] should be a string.
* configuration.module.rules[2].use[0] should be an instance of function
* configuration.module.rules[2].use[0].loader should be a string.
- configuration.resolve.extensions[0] should not be empty.
任何帮助都会很有帮助
答案 0 :(得分：1)
这是Webpack的分步指南。 https://webpack.js.org/migrate/
如果您有webpack不提供的插件，请检查存储库。
答案 1 :(得分：0)
我建议您先升级到版本2或3 https://webpack.js.org/migrate/3/，您将获得清晰的文档，并且会在Google中找到很大的帮助...
然后只能继续使用版本4 https://webpack.js.org/migrate/4/
答案 2 :(得分：0)
我只是放弃了它，并使用 create app cli 创建了一个新项目，并复制了内容并格式化了结构