Vue + typescript - TypeError: Object prototype may only be an Object or null: undefined

Question

TypeError: Object prototype may only be an Object or null: undefined

I got some error in my project. I\'m using vuejs, typescript and jest.

It\'s just simp

Answer 1

The problem seems to be how Vue2 exposes itself, so import Vue from "vue" causes this error.

I fixed it by using 'vue-property-decorator' like this:

import { Vue, Component, Prop } from 'vue-property-decorator';

So what does 'vue-property-decorator' do? It imports and then exports Vue not as default but named export. I guess you could do that in your own code, if you wanted.

import Vue, { PropOptions, WatchOptions } from 'vue';
...
export { Component, Vue, mixins as Mixins };