Property 'use' does not exist on type 'typeof..., Property 'extend' does not exist on type 'typeof

Question

I am building my vue app for the first time with TypeScript and I have been stuck on this Property 'xxx' does not exist on type 'typeof issue. I have researched similar problems but none seemed to work. I am on "vue": "^3.0.0-0" and "typescript": "~3.9.3"

I installed vuetify, so in my vuetify.ts I have the first error(Property 'use' does not exist on type 'typeof)

import Vue from 'vue'
import Vuetify from 'vuetify'

Vue.use(Vuetify)

export default new Vuetify({
})

I am passing it in my main.ts

createApp(App)
  .use(store)
  .use(router)
  .use(vuetify)
  .mount('#app')

Then on my App.vue where lies the other error (Property 'extend' does not exist on type 'typeof) I have

export default Vue.extend({
  name: 'App',

  components: {
    //
  },

  data: () => ({
    //
  })
})

I have also followed the configurations recommended here

Answer 1

Vue 3 has just been released. and there is no Vue.use() method anymore. the correct way now is as you did

createApp(App)
  .use(store)
  .use(router)
  .use(vuetify) // there
  .mount('#app')

same for Vue.extend() it doesn't exist anymore.

I don't know if vuetify is ready for vue 3 now, maybe the doc is not updated yet.

You should either downgrade Vue to version 2.X or start learning vue 3 and wait a bit that all the documentations are ready