title: How to initialize npm package in vue
body: <p>I trying to use <a href="https://www.npmjs.com/package/v-mask" rel="nofollow noreferrer">v-mask</a> package in vue using npm. i run the <code>npm install v-mask</code> as the documentation says, but where exactly I should put in code to initialization? i tried to put it in the main.js file:</p>
  <pre><code>import { createApp } from 'vue'
  import App from './App.vue'
  import VueMask from 'v-mask'
  Vue.use(VueMask);
  
  createApp(App).mount('#app')
  </code></pre>
  <p>but get an error 'Vue' is not defined. what am I doing wrong?</p>