vuejs · haoqunjiang · Jul 30, 2021 · Jul 21, 2021
diff --git a/.circleci/config.yml b/.circleci/config.yml
@@ -49,27 +49,13 @@ jobs:
           at: ~/
       - run: yarn test -p cli,cli-service,cli-shared-utils
 
-  core-webpack-4:
-    <<: *defaults
-    steps:
-      - attach_workspace:
-          at: ~/
-      - run: VUE_CLI_USE_WEBPACK4=true yarn test -p cli,cli-service,cli-shared-utils
-
   typescript:
     <<: *defaults
     steps:
       - attach_workspace:
           at: ~/
       - run: yarn test 'ts(?:\w(?!E2e))+\.spec\.js$'
 
-  typescript-webpack-4:
-    <<: *defaults
-    steps:
-      - attach_workspace:
-          at: ~/
-      - run: VUE_CLI_USE_WEBPACK4=true yarn test 'ts(?:\w(?!E2e))+\.spec\.js$'
-
   plugins:
     <<: *defaults
     steps:
@@ -79,13 +65,6 @@ jobs:
       - run: yarn check-links
       - run: yarn test -p eslint,pwa,babel,babel-preset-app,vuex,router
 
-  plugins-webpack-4:
-    <<: *defaults
-    steps:
-      - attach_workspace:
-          at: ~/
-      - run: VUE_CLI_USE_WEBPACK4=true yarn test -p eslint,pwa,babel,babel-preset-app,vuex,router
-
   tests:
     <<: *defaults
     steps:
@@ -95,14 +74,6 @@ jobs:
       # e2e-nightwatch was left out due to some unknown issues with selenium and the CI image
       - run: yarn test tsPluginE2e
 
-  tests-webpack-4:
-    <<: *defaults
-    steps:
-      - attach_workspace:
-          at: ~/
-      - run: VUE_CLI_USE_WEBPACK4=true yarn test -p unit-mocha,unit-jest,e2e-cypress
-      - run: VUE_CLI_USE_WEBPACK4=true yarn test tsPluginE2e
-
   cli-ui:
     <<: *defaults
     steps:
@@ -116,8 +87,6 @@ jobs:
       - store_artifacts:
           path: /home/circleci/.npm/_logs
 
-  # TODO: cli-ui-webpack-4
-
 workflows:
   version: 2
   test:
@@ -128,34 +97,18 @@ workflows:
           <<: *filters
           requires:
             - install
-      - core-webpack-4:
-          <<: *filters
-          requires:
-            - install
       - typescript:
           <<: *filters
           requires:
             - install
-      - typescript-webpack-4:
-          <<: *filters
-          requires:
-            - install
       - plugins:
           <<: *filters
           requires:
             - install
-      - plugins-webpack-4:
-          <<: *filters
-          requires:
-            - install
       - tests:
           <<: *filters
           requires:
             - install
-      - tests-webpack-4:
-          <<: *filters
-          requires:
-            - install
       - cli-ui:
           <<: *filters
           requires:

diff --git a/docs/core-plugins/webpack-4.md b/docs/core-plugins/webpack-4.md
diff --git a/docs/migrations/migrate-from-v4.md b/docs/migrations/migrate-from-v4.md
@@ -60,22 +60,6 @@ Besides the internal changes that are only noticeable for custom configurations,
 1. Named exports from JSON modules are no longer supported. Instead of `import { version } from './package.json'; console.log(version);` use `import package from './package.json'; console.log(package.version);`
 2. Webpack 5 does no longer include polyfills for Node.js modules by default. You shall see an informative error message if your code relies on any of these modules. A detailed list of previously polyfilled modules is also available [here](https://github.com/webpack/webpack/pull/8460/commits/a68426e9255edcce7822480b78416837617ab065).
 
-#### Opt Out to Webpack 4
-
-Considering many ecosystem packages haven't catched up yet, we provided a plugin to opt out to webpack 4 for easier migration.
-
-It's as simple as running
-
-```sh
-vue add webpack-4
-```
-
-at the project root.
-
-Underlyingly, it uses the [`resolutions`](https://classic.yarnpkg.com/en/docs/selective-version-resolutions) field for Yarn and PNPM users, and [`module-alias`](https://github.com/ilearnio/module-alias) for NPM users.
-
-Though both work in all our tests, please be aware that the `module-alias` approach is still considered hacky, and may not be as stable as the `"resolutions"` one.
-
 #### Changes to the `build` command and modern mode
 
 Starting with v5.0.0-beta.0, running `vue-cli-service build` will automatically generate different bundles based on your browserslist configurations.

diff --git a/jest.config.js b/jest.config.js
@@ -7,10 +7,3 @@ module.exports = {
     '**/__tests__/**/*.spec.js'
   ]
 }
-
-if (process.env.VUE_CLI_USE_WEBPACK4) {
-  module.exports.moduleNameMapper = {
-    '^webpack$': 'webpack-4',
-    '^webpack/(.*)': 'webpack-4/$1'
-  }
-}
diff --git a/packages/@vue/cli-plugin-webpack-4/README.md b/packages/@vue/cli-plugin-webpack-4/README.md
diff --git a/packages/@vue/cli-plugin-webpack-4/generator.js b/packages/@vue/cli-plugin-webpack-4/generator.js
diff --git a/packages/@vue/cli-plugin-webpack-4/index.js b/packages/@vue/cli-plugin-webpack-4/index.js
diff --git a/packages/@vue/cli-plugin-webpack-4/package.json b/packages/@vue/cli-plugin-webpack-4/package.json