Module Federation of webpack4

中文文档

Try online:

• webpack4 + webpack5
• vue-cli + umi-react

Examples:

// webpack.config.js
const MF = require("mf-webpack4")
module.exports = {
  plugins: [

    new MF({
      remotes: {
        "app2": "app2@http://localhost:9002/remoteEntry.js"
      },
      name: "app1",
      filename: "remoteEntry.js",
      shared: {
        "react": {
          singleton: true,
          requiredVersion: "16",
          strictVersion: true
        },
        "react-dom": {
          singleton: false,
        }
      },
      exposes: {
        "./App": "./src/App"
      }
    })

  ]
}

Options

shared

https://webpack.js.org/plugins/module-federation-plugin/

1. shared: ["react"]
2. shared: {react: "17.0.2"}
3. shared: {react: {"import", eager, requiredVersion, shareScope, singleton, version}}

remotes

remotes: {
    "app2": "app2@http://localhost:9002/remoteEntry.js",
    "promiseRemote": `promise {
      init() {},
      get() {
        return function () {
          return {
            promiseRemote: "aaaa"
          }
        }
      }
    }`
}

name

library required name

filename

default "remoteEntry.js"

exposes

exposes: {
    "./App": "./src/App"
}

Differences with webpack5

module-federation/webpack-4 The plugin has implemented the main capabilities of module-federation, and can be found in webpack4 and webpack5 refer to each other , The following describes which parameters are not supported by the plugin

unsupported parameter

options.library

The priority of this parameter is not very high, the implementation in webpack4 is more complicated, and there are still problems in using it in webpack5, see for details "webpack/webpack#16236" , Therefore, the implementation in webpack4 is similar to setting library.type = "global"

options.remotes.xxx.shareScope

The same mf container can only be initialized with one shareScope. If inconsistent webpack is set by using shareScope multiple times, it will report an error, and the shareScope can be set too much, which is confusing. Even in pure webpack5, the performance is unpredictable. It is recommended to use options. shared.xxx.shareScope, options.shareScope alternative

module-federation ecological package

The webpack-4 plugin has not yet integrated the ability of webpack-5 related packages（ssr、typescript、hmr、dashboard...）, However, 4 and 5 interoperability has been achieved, which can help you to use webpack5 to implement new projects without refactoring existing projects.