feat!: drop support for node <20.9

.github/workflows/nodejs.yml

@@ -69,7 +69,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        node-version: [18.x, 20.x, 22.x, 24.x]
+        node-version: [20.x, 22.x, 24.x, 25.x]
         shard: ["1/4", "2/4", "3/4", "4/4"]
         webpack-version: [latest]
 
@@ -91,12 +91,6 @@ jobs:
       - name: Install dependencies
         run: npm ci
 
-      - name: Install dependencies for Node.js@18
-        run: |
-          npm i p-retry@^4.5.0 open@^8.0.9
-          node ./scripts/prepare-test-for-old-node.js
-        if: matrix.node-version == '18.x'
-
       - name: Setup firefox
         if: matrix.os != 'windows-latest'
         uses: browser-actions/setup-firefox@latest
@@ -111,13 +105,8 @@ jobs:
           rm -r client
           cp -R tmp-client client
 
-      - name: Run tests for webpack version ${{ matrix.webpack-version }}
-        run: node_modules/.bin/jest --coverage --ci --shard=${{ matrix.shard }}
-        if: matrix.node-version == '18.x'
-
       - name: Run tests for webpack version ${{ matrix.webpack-version }}
         run: npm run test:coverage -- --ci --shard=${{ matrix.shard }}
-        if: matrix.node-version != '18.x'
 
       - name: Submit coverage data to codecov
         uses: codecov/codecov-action@v5

babel.config.js

@@ -24,7 +24,7 @@ module.exports = (api) => {
             "@babel/preset-env",
             {
               targets: {
-                node: "18.12.0",
+                node: "20.9.0",
               },
             },
           ],

migration-v6.md

@@ -2,6 +2,10 @@
 
 This document serves as a migration guide for `webpack-dev-server@6.0.0`.
 
+## ⚠ BREAKING CHANGES
+
+- Minimum supported `Node.js` version is `20.9.0`.
+
 ## Deprecations
 
 - The static methods `internalIP` and `internalIPSync` were removed. Use `findIp` instead.

package.json

@@ -148,6 +148,6 @@
     }
   },
   "engines": {
-    "node": ">= 18.12.0"
+    "node": ">= 20.9.0"
   }
 }