feat: Upgrade Angular 16.2.1 → 21.2.11#19
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Major version upgrade spanning Angular 16 → 21 with all breaking changes handled: - Update all @angular/* packages to 21.2.11 - Update TypeScript 4.9.5 → 5.9.3 - Update RxJS 6 → 7 (fix throwError to factory form) - Update zone.js 0.13 → 0.16 - Replace HttpClientModule with provideHttpClient(withFetch()) - Replace BrowserAnimationsModule with provideAnimationsAsync() - Add standalone: false to all NgModule-declared components/directives - Switch moduleResolution from 'node' to 'bundler' - Fix moment imports to use default import syntax - Remove deprecated polyfills.ts, test.ts, e2e/, protractor - Update ESLint config for angular-eslint 21 - Replace karma-coverage-istanbul-reporter with karma-coverage - Remove deprecated packages (codelyzer, ts-node, core-js, etc.) - Document all breaking changes in BREAKING_CHANGES.md
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Protractor and the e2e directory were removed but the npm script was left behind. Spotted by Devin Review.
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Summary
Major Angular version upgrade from 16.2.1 to 21.2.11 (5 major versions), with all breaking changes handled, deprecated APIs fixed, and dependencies updated.
Key changes:
@angular/*packages updated to 21.2.xnodetobundlerthrowErrorupdated to factory function formstandalone: falseto all NgModule-declared components (Angular 19+ default)polyfills.ts,test.ts,e2e/,protractor.conf.jskarma-coverage-istanbul-reporterwithkarma-coveragee2escript from package.jsonAll breaking changes are documented in
BREAKING_CHANGES.md.Review & Testing Checklist for Human
npm run buildnpm run lintnpm start(requires Spring PetClinic backend at localhost:9966)BREAKING_CHANGES.mdfor completenessNotes
browserbuilder (webpack) is retained inangular.jsoninstead of the newerapplicationbuilder (esbuild) due to a known incompatibility with Bootstrap 3's duplicate font file references. Thebrowserbuilder is still supported in Angular 21.prefer-standalone,prefer-inject, andtemplate/prefer-control-floware disabled — these are style recommendations for new Angular patterns (standalone components,inject()function,@if/@forcontrol flow) that would require a full codebase refactor beyond the scope of a version upgrade.e2e/directory was removed since Protractor is no longer supported. A migration to Playwright or Cypress is recommended for E2E testing.Link to Devin session: https://partner-workshops.devinenterprise.com/sessions/121f358bf89f43d6840230e5a0e06ac0
Requested by: @DhrovS