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Is the vue 3 migration compatible with vue 2?


Asked by Abdullah Bernard on Dec 14, 2021 Vue.js 2.0



We are still working on a dedicated Migration Build of Vue 3 with Vue 2 compatible behavior and runtime warnings of incompatible usage. If you are planning to migrate a non-trivial Vue 2 app, we strongly recommend waiting for the Migration Build for a smoother experience. The following consists a list of breaking changes from 2.x:
Accordingly,
@vue/compat (aka "the migration build") is a build of Vue 3 that provides configurable Vue 2 compatible behavior. The migration build runs in Vue 2 mode by default - most public APIs behave exactly like Vue 2, with only a few exceptions. Usage of features that have changed or been deprecated in Vue 3 will emit runtime warnings.
Next, Here’s the general workflow of upgrading your app from Vue 2 to Vue 3 using the migration build: Install Vue 3 and the migration build (called @vue/compat) to your existing Vue 2 app. Fix the errors caused by using features not compatible with the migration build. I’ll explain this in a bit.
In this manner,
The Official router for Vue 3 - there are some breaking changes in this version, so it has its own migration guide The Vue CLI plugin has a built-in option for Vue 3 projects as of version 4.5.0. Vuex 4 is also Vue 3 compatible, while providing the same API as Vuex 3. It's also already officially released.
Also Know,
The migration build is not a tool that automatically rewrites your code to be Vue 3-compatible, you still have to do that yourself manually (for the list code changes you have to make for Vue 3, check out the Vue 3 Migration Changes article).