[Discussion] Shall we add something like `Vue2` to vue-demi's export?

[Justineo]

My use case is to config ignoredElements only in Vue 2. Currently we may use:

import { Vue, isVue2 } from 'vue-demi'

if (isVue2) {
  Vue.config.ignoredElements.push(...)
}

The problem is that when this code is run with Vue 3, Vue contains all tree-shakable exports which is not ideal.

So shall we add a Vue2 export from vue-demi so that we can use it like:

import { Vue2 } from 'vue-demi'

if (Vue2) {
  Vue2.config.ignoredElements.push(...)
}

And in Vue 3 mode we just export undefined from vue-demi so it doesn't hurt the bundle size.

[antfu]

Sounds like a good solution to me. Would you like to make a PR for it? I think we can mark the Vue entry as @depreacted so it won't break the existing code but also give clear info for developers to migrate. Thanks.

[Justineo]

Sure.