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Comment by cjblomqvist | Hacker News Reader

We have a 100kloc codebase and migrated 2->3 + replaced our whole build stack (webpack -> vite) with a few dev days of effort (mostly on SSR stuff). It hasn't (at least not negatively) our general velocity at all.

A totally different thing than moving from Angular 1 -> 2 for example.

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Was an Angular 1 -> 2 even possible? If I remember correctly, they were one of the first big open source projects to go all in on Typescript and even the fundamental way that the rerender and state changes were tracked were completely different. I worked on an app on AngularJS and when asked for an assessment on a migration, it felt clear to me that it would require a complete rewrite. Even the tooling was totally different

It was a complete rewrite. Angular 1 vs. 2 share nothing besides name and some basic concepts. The actual code and tooling was completely separate.

That opening is what react used to become what it is today. With the 1 -> 2 no upgrade path it forced a rewrite and many left to react and never came back.

We're about to need to do the same thing with similarly sized codebase. Would love to hear your story. Did you find any migration tooling to help? Would be happy to DM to chat as well.

One of our issues is that we've used some component frameworks that also need to be migrated.

> Did you find any migration tooling to help?

With the caveat that I don't do software engineering professionally, I recently migrated a personal Vue 1/JavaScript project to Vue 3/TypeScript, and it was mostly painless. There's a migration guide¹, and Phind and Copilot were helpful.

¹ https://v3-migration.vuejs.org/migration-build.html

I did it to a similarly sized codebase too. Vue itself was painless.

I also migrated our component framework, from Buefy to Oruga. Some string replacement to change component prefixes, then Typescript to help catch incorrect properties. I might have fixed several bugs in the process thanks to Typescript working better with Oruga. The only real tricky part was converting customized CSS, which was A LOT in our case, but Oruga provides a better way of overriding CSS, so it was worth the time.

Took about 2 days of me doing pure coding with a blocked calendar, plus a third day for testing and code reviews by the rest of the team.

Basically, see other comments. We simply followed the migration guide. Very painless. We use few external libs, så that helped a lot. You can find me on LinkedIn with the same username as here for DM.

Going through the same migration from nuxt 2 to nuxt 3. Can you share more details? Did you also move from vuex to pinia ? If so, how did you manage the API change (dispatch, commit) scattered through the codebase. I'd love to learn more

We had a homegrown store lib that was very similar to pinia, so migration was basically minor renaming.

Like others have mentioned, the biggest fear was other libs we used. We are quite conservative with that though, so want a big deal.

I’d love to hear if anyone has done this migrating from vue 2 with class components. There doesn’t seem to be as nice of an upgrade path from what I can tell.

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