[英]Upgrading webpack4 webpack-merge react issue
我一直在嘗試將React項目更新為webpack4,但是無論是配置還是建議/解決方案,我都嘗試仍然出錯。
我目前有以下設置:
的package.json
{
"name": "PROJECTNAME",
"version": "1.0.13",
"description": "DESC",
"main": "index.js",
"engines": {
"node": "8.2.1"
},
"scripts": {
"build": "webpack --config webpack.prod.js --progress",
"dev": "webpack-dev-server --config webpack.dev.js --open --hot --watch"
},
"keywords": [],
"author": "AUTHOR",
"license": "MIT",
"resolve": {
"extensions": [
".js",
".scss"
]
},
"dependencies": {
"@fortawesome/fontawesome": "^1.1.8",
"@fortawesome/fontawesome-svg-core": "^1.2.2",
"@fortawesome/free-regular-svg-icons": "^5.2.0",
"@fortawesome/free-solid-svg-icons": "^5.2.0",
"@fortawesome/react-fontawesome": "^0.1.0",
"ajv": "^6.5.2",
"ajv-keywords": "^3.2.0",
"axios": "^0.18.0",
"fusioncharts": "^3.12.2",
"node-sass": "^4.6.1",
"prop-types": "^15.6.0",
"react": "^16.4.1",
"react-dom": "^16.4.1",
"react-fusioncharts": "^1.0.5",
"react-resize-detector": "^1.1.0",
"react-router-dom": "^4.2.2",
"react-select": "^1.1.0",
"recharts": "^1.2.0"
},
"devDependencies": {
"@babel/core": "^7.1.2",
"@babel/plugin-proposal-function-bind": "^7.0.0",
"@babel/preset-env": "^7.1.0",
"@babel/preset-react": "^7.0.0",
"@babel/preset-stage-0": "^7.0.0",
"babel-loader": "^8.0.4",
"babel-plugin-transform-class-properties": "^6.24.1",
"classnames": "^2.2.6",
"clean-webpack-plugin": "^0.1.19",
"copy-webpack-plugin": "^4.5.2",
"css-loader": "^1.0.0",
"file-loader": "^2.0.0",
"html-loader": "^0.5.5",
"html-webpack-plugin": "^3.0.6",
"react-hot-loader": "^4.3.11",
"sass-loader": "^7.1.0",
"style-loader": "^0.23.0",
"uglifyjs-webpack-plugin": "^2.0.1",
"webpack": "^4.20.2",
"webpack-cli": "^3.1.1",
"webpack-dev-server": "^3.1.0",
"webpack-merge": "^4.1.4"
}
}
.babelrc
{
"presets": [
"@babel/preset-env",
"@babel/preset-react",
"@babel/plugin-proposal-function-bind"
],
"plugins": [
"babel-plugin-transform-class-properties"
]
}
webpack.commonn.js
const path = require('path');
const CleanWebpackPlugin = require('clean-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
module.exports = {
entry: {
app: './src/index.js'
},
output: {
path: path.join(__dirname,'/public'),
filename: 'bundle.js'
},
module: {
rules: [
{
test: /\.js$/,
exclude: /node_modules/,
use: {
loader: 'babel-loader',
options: {
presets: ['env','react','es2015'],
plugins: ['transform-class-properties']
}
}
},
{
test: /\.css$/,
use: ["style-loader","css-loader"]
}
]
},
plugins: [
new CleanWebpackPlugin(['public']),
new HtmlWebpackPlugin({
template: './src/index.html'
})
]
};
webpack.dev.js
const webpack = require('webpack');
const merge = require('webpack-merge');
const common = require('./webpack.common');
module.exports = merge(common, {
mode: 'development',
devtool: 'inline-source-map',
devServer: {
contentBase: './public'
}
});
webpack.prod.js
const merge = require('webpack-merge');
const common = require('./webpack.common');
const UglifyJSPlugin = require('uglifyjs-webpack-plugin');
module.exports = merge(common, {
mode: 'production',
optimization: {
minimizer: [
new UglifyJSPlugin({
sourceMap: true,
uglifyOptions: {
compress: {
inline: false
},
mangle: {
keep_fnames: true
}
}
})
]
},
devtool: 'source-map'
});
index.js
"use strict";
import React from 'react';
import ReactDOM from 'react-dom';
import './styles/app.scss';
import App from './components/App';
if (process.env.NODE_ENV !== 'production') {
console.log('USING DEV configuration')
}
const app = (
<App/>
);
ReactDOM.render(app, document.getElementById('app'));
當前的錯誤是:
./src/index.js中的錯誤模塊構建失敗(來自./node_modules/babel-loader/lib/index.js):錯誤:從'user / mywork / dev'中找不到模塊'babel-preset-env'-您是說“ @ babel / env”嗎?
我以前使用的是stage-2或stage-0來啟用箭頭功能等,但似乎與預設環境沖突,因此暫時將其刪除並按建議擴展.babelrc預設,但似乎還是無法獲得全部工作正常。
任何建議最歡迎,謝謝。
您要在兩個位置指定babel選項,首先在.babelrc中,然后在webpack.commonn.js中。 webpack.commonn.js中的選項優先,但是該設置是錯誤的:
presets: ['env','react','es2015']
通過以上操作,您告訴babel尋找未安裝的“ babel-preset-env”,“ babel-preset-react”等。
因此,您得到了錯誤:
Cannot find module 'babel-preset-env' from 'user/mywork/dev' - Did you mean "@babel/env"?
由於您已安裝:
@babel/preset-env, and @babel/preset-react, etc.
您應該指定:
presets: ['@babel/env','@babel/preset-react', .... ],
但是您應該在一個位置指定babel的選項,無論是在webpack的配置中還是在.babelrc中-而不是兩個位置。
我注意到的另一個錯誤是:babel-plugin-transform-class-properties,它與bable @ 7不兼容。 您應該安裝@ babel / plugin-proposal-class-properties。
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