vue封装插件

参考内容：vue的组件插件化封装

//toast/index.js
import Toast from './toast.vue'
const toast = {}
toast.install = function(Vue) {
  console.log('use了toast插件')
  // 1. 创建组件构造器
	const toastConstructor = Vue.extend(Toast)
	// 2. 使用组件构造器创建一个组件
 	const toast = new toastConstructor()
	// 3. 将组件手动挂载到一个元素上
	toast.$mount(document.createElement('div'))
	// 4. 将节点插入到页面中，$el就是改组件的节点
	document.body.appendChild(toast.$el)
	// 5. 将组件加入到vue实例上
	Vue.prototype.$toast = toast
}
export default toast

toast/toast.vue

<template>
  <div class="toast" v-show="isShow">{{massage}}</div>
</template>
<script>
export default {
  name: "Toast",
  data() {
    return {
      massage: '',
      isShow: false
    }
  },
  methods: {
    show(msg='默认文字',durations=2000) {
      console.log('----')
      this.massage = msg
      this.isShow = true
      setTimeout(()=>{
        this.isShow = false
      },durations)
    }
  }

}
</script>
<style scoped>
.toast {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  padding: 7px 10px;
  background-color: rgba(0,0,0,.8);
  border-radius: 4px;
  color: #fff;
  z-index: 9999;
}
</style>

入口文件，一般为main.js

....

import toast from '@/plugins/toast/index.js'
Vue.use(toast)

...