我有一个非常准的Express / Webpack设置,并按照说明使用webpack-hot-middleware,但是,每当我运行服务器时,都会收到一连串警告和错误消息,它们引用了node_modules
不知道需要使用错误的公共结束行作为对@./app @multi node ./app.js
的引用,这是否与config.js中的多条目设置有关,而不是缺少模块?
错误示例:
WARNING in ./node_modules/terser-webpack-plugin/dist/worker.js 12:130-137
Critical dependency: require function is used in a way in which dependencies cannot be statically extracted
@ ./node_modules/terser-webpack-plugin/dist/TaskRunner.js
@ ./node_modules/terser-webpack-plugin/dist/index.js
@ ./node_modules/terser-webpack-plugin/dist/cjs.js
@ (webpack)/lib/WebpackOptionsDefaulter.js
@ (webpack)/lib/webpack.js
@ ./app.js
@ multi node ./app.js
「wdm」: Failed to compile.
这是我的 config.json
在节点v10.16.0
和npm 6.9.0
上运行
{
"name": "express-react-boilerplate",
"version": "1.0.0",
"description": "",
"main": "app.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"author": "",
"license": "ISC",
"dependencies": {
"body-parser": "^1.19.0",
"cookie-parser": "^1.4.4",
"express": "^4.17.1",
"morgan": "^1.9.1",
"react": "^16.8.6",
"react-dom": "^16.8.6"
},
"devDependencies": {
"@babel/core": "^7.5.5",
"@babel/preset-env": "^7.5.5",
"babel-loader": "^8.0.6",
"webpack": "^4.38.0",
"webpack-cli": "^3.3.6",
"webpack-dev-middleware": "^3.7.0",
"webpack-dev-server": "^3.7.2",
"webpack-hot-middleware": "^2.25.0"
}
}
我的 webpack.config.js
:
var webpack = require('webpack');
module.exports = {
//Entry
context: __dirname,
entry: {
app: [
"webpack-hot-middleware/client",
"./app.js"
]
},
mode: 'development',
//Output
output: {
path: __dirname + "/dist",
filename: "bundle.js"
},
//Loaders
module: {
rules: [
{ test: /\.js$/, exclude: /node_modules/, use: "babel-loader" },
],
},
plugins: [
new webpack.HotModuleReplacementPlugin()
]
}
和 app.js
var express = require('express');
var path = require('path');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var webpack = require('webpack');
var webpackDevMiddleware = require('webpack-dev-middleware');
var webpackHotMiddleware = require('webpack-hot-middleware');
var webpackConfig = require('./webpack.config');
const compiler = webpack(webpackConfig);
var app = express();
var port = 3000;
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
console.log(process.env.NODE_ENV)
app.get('/', function(req, res){
res.send('Test')
})
//Enable "webpack-dev-middleware"
app.use(webpackDevMiddleware(compiler, {
noInfo: true,
publicPath: webpackConfig.output.publicPath
}));
//Enable "webpack-hot-middleware"
app.use(webpackHotMiddleware(compiler));
app.listen(port, () => {
console.log('Server started on port:' + port);
});
module.exports = app;
缺少的node_modules列表,但是我不认为这是问题所在
aws-sdk, child_process, fs
指向最有可能通过特定软件包安装的各种node_module文件夹
答案 0 :(得分:0)
在阅读了与相关问题有关的github问题之后,我发现了一个解决方法,方法是添加target: node
来告诉webpack它正在nodejs环境中运行,并避免构建内置的节点模块,然后添加模块{{ 1}}告诉webpack避免使用所有外部节点模块。不确定是否需要运行中间件,但这对我有用!