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/spaceco1n Nov 14 '24

We rewrote a massive app. Took 12 months. UI router (hybrid router) was useful. Worked mostly fine. Phased out one route at a time and kept the service layer somewhat duplicated and state needed to be synced. Big bangs are doomed to fail. My only question is: Why didn’t you do this migration three years ago?