(Vue 2.6 + Composition Api) useVuelidate() stops all returned setup() data from being referenced in the template?

[tleytek]

Describe the bug
Once useVuelidate() is instantiated within setup(), all references to setup() return values don't exist in the template.

Reproduction URL
Vuelidate 2 - Composition API + Vue 2.6

To Reproduce
Steps to reproduce the behavior:

1. Instantiate useVuelidate() within setup()

Expected behavior
I should be able to reference v$ or any value's I am returning from setup() in the template

[dobromir-hristov]

• I am not sure i understand what the issue is. Your repro link looks alright.

[dobromir-hristov]

Vuelidate has issues because of VueDemi in codesandbox.

Can you check this on your local?

[tleytek]

Now it seems that calling useVuelidate() causes vue composition api to stop working in other components.

Github repo
Netlify deployment

For contrast, a vue 2.6 app and vue 3 app both implementing vuelidate validations using the composition API
Vue 2.6 + Vuelidate 2 (Using composition api)
Github repo
Netlify deploy

Vue 3 + Vuelidate 2 (Using composition api)
Github repo
Netlify deploy

[dobromir-hristov]

This is a problem with the version of Vue-demi we have under the hood.

Changing the import to @vue/composition-api/dist/vue-composition-api.esm from @vue/composition-api fixes all the issues, but this is not OK.

I will try updating the deps as this might fix things - vueuse/vue-demi#105