Move to npm

.devcontainer/devcontainer.json

@@ -9,7 +9,7 @@
   "forwardPorts": [
     3000
   ],
-  "postCreateCommand": "yarn install && yarn setup",
+  "postCreateCommand": "npm install && npm run setup",
   "customizations": {
     "vscode": {
       "extensions": [

.github/workflows/ci.yml

@@ -12,17 +12,17 @@ jobs:
     timeout-minutes: 10
     steps:
     - uses: actions/checkout@v3
-    - name: Use Node.js 18.x
+    - name: Use Node.js 22.x
       uses: actions/setup-node@v3
       with:
-        node-version: 18.x
-        cache: 'yarn'
+        node-version: 22.x
+        cache: 'npm'
     - name: Install dependencies
-      run: yarn --frozen-lockfile
+      run: npm ci
     - name: Setup and run tsc
-      run: yarn setup
+      run: npm run setup
     - name: Esbuild
-      run: yarn esbuild
+      run: npm run esbuild
     - name: Zip artifacts
       run: |
         zip -r compressed-build \
@@ -77,21 +77,21 @@ jobs:
     timeout-minutes: 10
     steps:
     - uses: actions/checkout@v3
-    - name: Use Node.js 18.x
+    - name: Use Node.js 22.x
       uses: actions/setup-node@v3
       with:
-        node-version: 18.x
-        cache: 'yarn'
+        node-version: 22.x
+        cache: 'npm'
     - name: Install dependencies
       run: |
-        yarn --frozen-lockfile
-        yarn install-addons
+        npm ci
+        npm run install-addons
     - name: Lint code
       env:
         NODE_OPTIONS: --max_old_space_size=4096
-      run: yarn lint
+      run: npm run lint
     - name: Lint API
-      run: yarn lint-api
+      run: npm run lint-api
 
   test-unit-coverage:
     needs: build
@@ -99,15 +99,15 @@ jobs:
     timeout-minutes: 10
     steps:
     - uses: actions/checkout@v3
-    - name: Use Node.js 18.x
+    - name: Use Node.js 22.x
       uses: actions/setup-node@v3
       with:
-        node-version: 18.x
-        cache: 'yarn'
+        node-version: 22.x
+        cache: 'npm'
     - name: Install dependencies
       run: |
-        yarn --frozen-lockfile
-        yarn install-addons
+        npm ci
+        npm run install-addons
     - uses: actions/download-artifact@v4
       with:
         name: build-artifacts
@@ -122,7 +122,7 @@ jobs:
         ls -R
     - name: Unit test coverage
       run: |
-        yarn test-unit-coverage --forbid-only
+        npm run test-unit-coverage --forbid-only
         EXIT_CODE=$?
         ./node_modules/.bin/nyc report --reporter=cobertura
         exit $EXIT_CODE
@@ -131,7 +131,7 @@ jobs:
     timeout-minutes: 20
     strategy:
       matrix:
-        node-version: [18]
+        node-version: [22]
         runs-on: [ubuntu, macos, windows]
     runs-on: ${{ matrix.runs-on }}-latest
     steps:
@@ -140,11 +140,11 @@ jobs:
       uses: actions/setup-node@v3
       with:
         node-version: ${{ matrix.node-version }}.x
-        cache: 'yarn'
+        cache: 'npm'
     - name: Install dependencies
       run: |
-        yarn --frozen-lockfile
-        yarn install-addons
+        npm ci
+        npm run install-addons
     - name: Wait for build job
       uses: NathanFirmo/wait-for-other-job@v1.1.1
       with:
@@ -163,13 +163,13 @@ jobs:
         fi
         ls -R
     - name: Unit tests
-      run: yarn test-unit --forbid-only
+      run: npm run test-unit --forbid-only
 
   test-integration:
     timeout-minutes: 20
     strategy:
       matrix:
-        node-version: [18] # just one as integration tests are about testing in browser
+        node-version: [22] # just one as integration tests are about testing in browser
         runs-on: [ubuntu-22.04] # macos is flaky
         browser: [chromium, firefox, webkit]
     runs-on: ${{ matrix.runs-on }}
@@ -179,11 +179,11 @@ jobs:
       uses: actions/setup-node@v3
       with:
         node-version: ${{ matrix.node-version }}.x
-        cache: 'yarn'
+        cache: 'npm'
     - name: Install dependencies
       run: |
-        yarn --frozen-lockfile
-        yarn install-addons
+        npm ci
+        npm run install-addons
     - name: Install playwright
       run: npx playwright install --with-deps ${{ matrix.browser }}
     - name: Wait for build job
@@ -204,49 +204,49 @@ jobs:
         fi
         ls -R
     - name: Build demo
-      run: yarn esbuild-demo
+      run: npm run esbuild-demo
     - name: Integration tests (core) # Tests use 50% workers to reduce flakiness
-      run: yarn test-integration-${{ matrix.browser }} --workers=50% --forbid-only --suite=core
+      run: npm run test-integration-${{ matrix.browser }} --workers=50% --forbid-only --suite=core
     - name: Integration tests (addon-attach)
-      run: yarn test-integration-${{ matrix.browser }} --workers=50% --forbid-only --suite=addon-attach
+      run: npm run test-integration-${{ matrix.browser }} --workers=50% --forbid-only --suite=addon-attach
     - name: Integration tests (addon-clipboard)
-      run: yarn test-integration-${{ matrix.browser }} --workers=50% --forbid-only --suite=addon-clipboard
+      run: npm run test-integration-${{ matrix.browser }} --workers=50% --forbid-only --suite=addon-clipboard
     - name: Integration tests (addon-fit)
-      run: yarn test-integration-${{ matrix.browser }} --workers=50% --forbid-only --suite=addon-fit
+      run: npm run test-integration-${{ matrix.browser }} --workers=50% --forbid-only --suite=addon-fit
     - name: Integration tests (addon-image)
-      run: yarn test-integration-${{ matrix.browser }} --workers=50% --forbid-only --suite=addon-image
+      run: npm run test-integration-${{ matrix.browser }} --workers=50% --forbid-only --suite=addon-image
     - name: Integration tests (addon-progress)
-      run: yarn test-integration-${{ matrix.browser }} --workers=50% --forbid-only --suite=addon-progress
+      run: npm run test-integration-${{ matrix.browser }} --workers=50% --forbid-only --suite=addon-progress
     - name: Integration tests (addon-search)
-      run: yarn test-integration-${{ matrix.browser }} --workers=50% --forbid-only --suite=addon-search
+      run: npm run test-integration-${{ matrix.browser }} --workers=50% --forbid-only --suite=addon-search
     - name: Integration tests (addon-serialize)
-      run: yarn test-integration-${{ matrix.browser }} --workers=50% --forbid-only --suite=addon-serialize
+      run: npm run test-integration-${{ matrix.browser }} --workers=50% --forbid-only --suite=addon-serialize
     - name: Integration tests (addon-unicode-graphemes)
-      run: yarn test-integration-${{ matrix.browser }} --workers=50% --forbid-only --suite=addon-unicode-graphemes
+      run: npm run test-integration-${{ matrix.browser }} --workers=50% --forbid-only --suite=addon-unicode-graphemes
     - name: Integration tests (addon-unicode11)
-      run: yarn test-integration-${{ matrix.browser }} --workers=50% --forbid-only --suite=addon-unicode11
+      run: npm run test-integration-${{ matrix.browser }} --workers=50% --forbid-only --suite=addon-unicode11
     - name: Integration tests (addon-web-links)
-      run: yarn test-integration-${{ matrix.browser }} --workers=50% --forbid-only --suite=addon-web-links
+      run: npm run test-integration-${{ matrix.browser }} --workers=50% --forbid-only --suite=addon-web-links
     - name: Integration tests (addon-webgl)
-      run: yarn test-integration-${{ matrix.browser }} --workers=50% --forbid-only --suite=addon-webgl
+      run: npm run test-integration-${{ matrix.browser }} --workers=50% --forbid-only --suite=addon-webgl
 
   release-dry-run:
     needs: build
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [18]
+        node-version: [22]
     steps:
     - uses: actions/checkout@v3
     - name: Use Node.js ${{ matrix.node-version }}.x
       uses: actions/setup-node@v3
       with:
         node-version: ${{ matrix.node-version }}.x
-        cache: 'yarn'
+        cache: 'npm'
     - name: Install dependencies
       run: |
-        yarn --frozen-lockfile
-        yarn install-addons
+        npm ci
+        npm run install-addons
     - name: Install playwright
       run: npx playwright install
     - uses: actions/download-artifact@v4
@@ -263,7 +263,7 @@ jobs:
         ls -R
     - name: Package headless
       run: |
-        yarn package-headless
+        npm run package-headless
         node ./bin/package_headless.js
     - name: Publish to npm (dry run)
       run: node ./bin/publish.js --dry

.github/workflows/copilot-setup-steps.yml

@@ -19,18 +19,14 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
-
-      - name: Use Node.js 20.x
+      - name: Use Node.js 22.x
         uses: actions/setup-node@v3
         with:
-          node-version: 20.x
-          cache: 'yarn'
-
+          node-version: 22.x
+          cache: 'npm'
       - name: Install dependencies
-        run: yarn --frozen-lockfile
-
+        run: npm ci
       - name: Setup and run tsc
-        run: yarn setup
-
+        run: npm run setup
       - name: Esbuild
-        run: yarn esbuild
+        run: npm run esbuild

.github/workflows/release.yml

@@ -11,18 +11,18 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v3
-    - name: Use Node.js 18.x
+    - name: Use Node.js 22.x
       uses: actions/setup-node@v3
       with:
-        node-version: 18.x
-        cache: 'yarn'
+        node-version: 22.x
+        cache: 'npm'
     - name: Install dependencies
-      run: yarn --frozen-lockfile
+      run: npm ci
     - name: Build
-      run: yarn setup
+      run: npm run setup
     - name: Package headless
       run: |
-        yarn package-headless
+        npm run package-headless
         node ./bin/package_headless.js
     - name: Publish to npm
       env:

.gitignore

@@ -18,7 +18,7 @@ npm-debug.log
 .env
 build/
 .DS_Store
-package-lock.json
+yarn.lock
 
 # Keep bundled code out of Git
 dist/

CONTRIBUTING.md

@@ -65,40 +65,40 @@ One area that always needs attention is improving out unit test coverage, you ca
 
 ### Unit tests
 
-Unit tests are run with `yarn test-unit`:
+Unit tests are run with `npm run test-unit`:
 
 ```sh
 # All unit tests
-yarn test-unit
+npm run test-unit
 
 # Absolute file path
-yarn test-unit out-esbuild/browser/Terminal.test.js
+npm run test-unit out-esbuild/browser/Terminal.test.js
 
 # Filter by wildcard
-yarn test-unit out-esbuild/**/Terminal.test.js
+npm run test-unit out-esbuild/**/Terminal.test.js
 
 # Specific addon unit tests tests
-yarn test-unit addons/addon-image/out-esbuild/*.test.js
+npm run test-unit addons/addon-image/out-esbuild/*.test.js
 
 # Multiple files
-yarn test-unit out-esbuild/**/Terminal.test.js out-esbuild/**/InputHandler.test.js
+npm run test-unit out-esbuild/**/Terminal.test.js out-esbuild/**/InputHandler.test.js
 ```
 
 These use mocha to run all `.test.js` files within the esbuild output (`out-esbuild/`).
 
 ### Integration tests
 
-Integration tests are run with `yarn test-integration`:
+Integration tests are run with `npm run test-integration`:
 
 ```sh
 # All integration tests
-yarn test-integration
+npm run test-integration
 
 # Core integration tests
-yarn test-integration --suite=core
+npm run test-integration --suite=core
 
 # Specific addon integration tests
-yarn test-integration --suite=addon-search
+npm run test-integration --suite=addon-search
 ```
 
 These use `@playwright/test` to run all tests within the esbuild test output (`out-esbuild-test/`).

addons/addon-image/.gitignore

@@ -17,7 +17,6 @@ npm-debug.log
 .env
 build/
 .DS_Store
-package-lock.json
 yarn.lock
 
 # Keep bundled code out of Git

addons/addon-ligatures/.gitignore

@@ -10,4 +10,3 @@ fonts/
 *.swp
 *.tgz
 npm-debug.log*
-yarn-error.log*

addons/addon-serialize/README.md

@@ -34,9 +34,9 @@ See the full [API](https://github.com/xtermjs/xterm.js/blob/master/addons/addon-
 ```shell
 $ git clone https://github.com/xtermjs/xterm.js.git
 $ cd xterm.js
-$ yarn
+$ npm ci
 $ cd addons/addon-serialize
-$ yarn benchmark && yarn benchmark-baseline
+$ npm run benchmark && npm run benchmark-baseline
 $ # change some code in `@xterm/addon-serialize`
-$ yarn benchmark-eval
+$ npm run benchmark-eval
 ```

bin/install-addons.js

@@ -16,13 +16,6 @@ const addonsPath = path.join(PACKAGE_ROOT, 'addons');
 if (fs.existsSync(addonsPath)) {
   console.log('pulling addon dependencies...');
 
-  // whether to use yarn or npm
-  let hasYarn = false;
-  try {
-    cp.execSync('yarn --version').toString();
-    hasYarn = true;
-  } catch(e) {}
-
   // walk all addon folders
   fs.readdir(addonsPath, (err, files) => {
     for (const folder of files) {
@@ -43,11 +36,7 @@ if (fs.existsSync(addonsPath)) {
           )
       {
         console.log('Preparing', folder);
-        if (hasYarn) {
-          cp.execSync('yarn', {cwd: addonPath});
-        } else {
-          cp.execSync('npm install', {cwd: addonPath});
-        }
+        cp.execSync('npm ci', {cwd: addonPath});
       } else {
         console.log('Skipped', folder);
       }

bin/test_unit.js

@@ -20,7 +20,7 @@ if (process.argv.length > 2) {
   const args = process.argv.slice(2);
   flagArgs = args.filter(e => e.startsWith('--'));
   // ability to inject particular test files via
-  // yarn test [testFileA testFileB ...]
+  // npm run test [testFileA testFileB ...]
   files = args.filter(e => !e.startsWith('--'));
   if (files.length) {
     testFiles = files;

bin/update-website.sh

@@ -6,7 +6,7 @@ VERSION=$1
 # Clone docs repo and update the documentation
 git clone https://github.com/xtermjs/xtermjs.org
 cd xtermjs.org
-yarn
+npm ci
 ./bin/update-docs
 
 # Add changes to index and only proceed if there are changes to commit

src/vs/README.md

@@ -16,7 +16,7 @@ node ./bin/vs_base_find_unused.js
 
 The last step is to do a once over of the resulting bundled xterm.js file to ensure it isn't too large:
 
-1. Run `yarn esbuild`
+1. Run `npm run esbuild`
 2. Open up `xterm.mjs`
 3. Search for `src/vs/base/`
 

webpack.config.headless.js

@@ -7,9 +7,9 @@ const path = require('path');
 
 /**
  * This webpack config does a production build for xterm.js headless. It works by taking the output
- * from tsc (via `yarn watch` or `yarn prebuild`) which are put into `out/` and webpacks them into a
- * production mode umd library module in `lib-headless/`. The aliases are used fix up the absolute
- * paths output by tsc (because of `baseUrl` and `paths` in `tsconfig.json`.
+ * from tsc (via `npm run watch` or `npm run prebuild`) which are put into `out/` and webpacks them
+ * into a production mode umd library module in `lib-headless/`. The aliases are used fix up the
+ * absolute paths output by tsc (because of `baseUrl` and `paths` in `tsconfig.json`.
  *
  * @type {import('webpack').Configuration}
  */

webpack.config.js

@@ -9,7 +9,7 @@ const path = require('path');
 
 /**
  * This webpack config does a production build for xterm.js. It works by taking the output from tsc
- * (via `yarn watch` or `yarn prebuild`) which are put into `out/` and webpacks them into a
+ * (via `npm run watch` or `npm run prebuild`) which are put into `out/` and webpacks them into a
  * production mode umd library module in `lib/`. The aliases are used fix up the absolute paths
  * output by tsc (because of `baseUrl` and `paths` in `tsconfig.json`.
  *