webpack : Uncaught ReferenceError: require is not

This error comes when in webpack target = node but i have done target=web(default)

also i am not loading reactjs externally

this error comes on loading app in browser

what i am doing wrong ?

In Console

File

webpack.config.js

const HtmlWebpackPlugin = require('html-webpack-plugin');
const nodeExternals = require('webpack-node-externals');

const config = {
    target: 'web',
    externals: [nodeExternals()],
    entry: './src/index.js',
    output: {
        filename: '[name].bundle.js',
        path: __dirname + '/build'
    },
    module: {
        rules: [
            {
                test: /\.js$/,
                loader: 'babel-loader',
                exclude: /node_modules/
            },
            {
                test: /\.css$/,
                use: ExtractTextPlugin.extract({
                    fallback: "style-loader",
                    use: "css-loader"
                })
            },
            {
                test: /\.(png|svg|jpe?g|gif)$/,
                use: [{
                        loader: 'file-loader',
                        options: {
                            name: '[path][name].[ext]'
                        }
                    }
                ]
            },
            {
                test: /\.(woff|woff2|eot|ttf|otf)$/,
                use: ['file-loader']
            }
        ]
    },
    devtool: 'inline-source-map',
    plugins: [
        new HtmlWebpackPlugin({
            title: 'Instarem.com'
        })
    ]
};

module.exports = config;

.babelrc using

`babel-preset-env`

{
    "presets": [
        "react",
        [
            "env",
            {
                "targets": {
                    "browsers": ["last 2 versions"]
                },
                "debug": true,
                "modules": "commonjs"
            }
        ]
    ],
    "plugins": [
        "transform-object-rest-spread",
        "transform-class-properties"
    ]
}

thanks :)

I found Clue

In facebook's create react app generator bundle it shows

module.exports = __webpack_require__(/*! ./lib/React */ "./node_modules/react/lib/React.js");

but in my case it shows only

module.exports = require("react");

标签： javascript reactjs webpack ecmascript-6 babeljs

4条回答

我想做一个坏孩纸

2楼-- · 2020-08-10 04:36

You should not use

externals: [nodeExternals()],

in web app. According to https://github.com/liady/webpack-node-externals it is only for backend. Since you use nodeExternals in web app you get CommonJS modules, that expects built in node require function. So just remove it to fix error.

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姐就是有狂的资本

3楼-- · 2020-08-10 04:46

I set this config up (minus the extraneous things that seem to be specific to your env) locally and it worked.

package.json

{
  "name": "test-webpack",
  "version": "1.0.0",
  "description": "",
  "main": "webpack.config.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "start": "webpack"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "babel-core": "^6.26.0",
    "babel-loader": "^7.1.2",
    "babel-preset-env": "^1.6.0",
    "babel-preset-react": "^6.24.1",
    "webpack": "^3.5.5"
  },
  "dependencies": {
    "react": "^15.6.1",
    "react-dom": "^15.6.1"
  }
}

.babelrc

{
  "presets": [
    "react",
    [
      "env",
      {
        "targets": {
          "browsers": ["last 2 versions"]
        },
        "debug": true,
        "modules": "commonjs"
      }
    ]
  ]
}

webpack.config.js

const config = {
  target: 'web',
  entry: './index.js',
  output: {
    filename: '[name].bundle.js',
    path: __dirname + '/build',
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        loader: 'babel-loader',
        exclude: /node_modules/,
      },
    ],
  },
};
module.exports = config;

index.js

import React from 'react';
import ReactDOM from 'react-dom';
ReactDOM.render(<div>Hello</div>, document.getElementById('root'));

index.html

<body>
    <div id="root" />
    <script src=" ./build/main.bundle.js "></script>
</body>

Running npm start built the bundle and running index.html ran the react app.

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一纸荒年 Trace。

4楼-- · 2020-08-10 04:51

Maybe it will be helpful for someone. Add into call nodeExternals option importType with value 'umd'.

nodeExternals({
   importType: 'umd'
})

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We Are One

5楼-- · 2020-08-10 04:51

If you are using webpack and HtmlWebpackPlugin, try to remove <script src="./src/app.js"></script> from index.html

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webpack : Uncaught ReferenceError: require is not

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