feat(jest): add zoneless testing support for Angular 21 #1963
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- Add `zoneless` option (default: true) to configure test environment - Create separate setup files for zone and zoneless modes - Remove obsolete global mocks (styleTransform, getComputedStyle, doctype) - Keep only matchMedia mock (jsdom still doesn't support it) - Update example apps: simple-app/my-second-app use zone.js, my-first-app/my-shared-library use zoneless - Filter builder-specific options before passing to Jest CLI BREAKING CHANGE: zoneless is now the default. Apps using zone.js change detection must set `zoneless: false` in angular.json. BREAKING CHANGE: globalMocks option only supports matchMedia. The styleTransform, getComputedStyle, and doctype mocks have been removed as Jest 30's jsdom supports these natively. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <[email protected]>
- Remove zone.js from polyfills - Add provideZonelessChangeDetection() provider - Convert AppComponent to use signals - Add test verifying zoneless change detection works automatically This demonstrates a complete zoneless Angular 21 setup where signal updates automatically trigger view updates without zone.js.
The new zoneless test added a 4th test to my-first-app.
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Summary
zonelessoption (default:true) to configure test environment for Angular 21+styleTransform,getComputedStyle,doctype)matchMediamock (jsdom still doesn't support it)Breaking Changes
zoneless: falsein angular.jsonmatchMediais supported. ThestyleTransform,getComputedStyle, anddoctypemocks have been removed as Jest 30's jsdom supports these nativelyTest plan
zoneless: false)zoneless: false)🤖 Generated with Claude Code