Angular 19 to Angular 20 Upgrade

Purpose

Upgrade an Angular application from Angular 19.x to Angular 20.x using a controlled major-hop process.

When to Use

• The project uses Angular 19.x.
• The target next hop is Angular 20.x.
• The Angular 18 -> 19 validation gate passed.
• Angular Material usage is known.
• TypeScript configuration is known.
• Node.js runtime is known.
• Router guard/redirect usage is known.
• Resource/RxResource usage is known.
• Test strategy is known.

When Not to Use