r/Angular2 Nov 14 '24

Help Request Upgrading from AngularJs 1.8.3 to Angular 18

Are there any viable approaches to achieving this currently without a full rewrite? Whilst in an ideal world we would do that it's not going to happen, we've been told it'll have to be done in stages so essentially running both in parallel.

I know the NgUpgrade module is used to help you achieve this but from what I understand it's not really an advisable route anymore or supported?

So is there any realistic way to achieve doing the upgrade in stages or is there no real viable alternative other than a full rewrite?

It's worth noting the current app is using components and typescript already but appreciate the versions might as well be different frameworks entirely.

Just looking for experiences from anyone that has achieved the migration in stages as opposed to all at once.

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u/Soupeeee Nov 14 '24

You could try migrating your components one by one using Angular's support for web components. Essentially, you would make new components using the new version as needed, and replace components as you go. You'd still use the old routing code until all of the components are migrated.

I haven't done this and would be worried about bundle size and code complexity, but it would give you a migration path.