npm i jsscan

import Vue from 'vue'
import App from './App.vue'  
               
// 全局引入 扫呀
import jsscan from " jsscan"; import "../node_modules/jsscan/jsscan.css" ; Vue.use(jsscan); new Vue({ render: h=>
              h(App),
              }).$mount('#app')
              

<template>
  <div id="app">
    <扫呀 />
  </div>
</template>
<script>
  export default {
    name: 'App',
    components: {
    }
  }
</script>