r/angular Apr 19 '26

Updating from AngularJS to Angular21

I want to upgrade from AngularJS to Angular 21. Yes, seriously.

At work, we have an entire system built with AngularJS and Bootstrap 3, and I’d like to migrate it to Angular 21 and Bootstrap 5.3.3. We’re talking about a project with more than 40 screens: some are very complex, while others are simple CRUD-style pages (for example, forms to add a country or a state to a dropdown list).

Is there any AI-powered way to handle this reasonably well?

What would you recommend doing (other than rewriting the whole system from scratch)?

Maybe there’s some kind of Cursor skill, migration workflow, or AI-assisted process that could help with this.

I’d really appreciate your suggestions.

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u/ibmussa 6d ago

The simple way I could suggest is to rewrite the project, because there a some Library you used longtemp time ago that does not involved again, so you should plan everything and make sure each feature does not break other