Vue-封装loading

1.loading/index.vue

<template>
  <div v-if="show" class="lds-spinner">
    <div class="spinner">
      <div class="double-bounce1"></div>
      <div class="double-bounce2"></div>
    </div>
  </div>
</template>
<script>
export default {
  name: 'Loading',
  props: {
    show: Boolean
  },
  data() {
    return {
    }
  }
}
</script>
<style scoped>
.lds-spinner{
  position: fixed;
  top:0;
  left:0;
  width:100%;
  height:100%;
}
.spinner {
  width: 25px;
  height: 25px;
  position:absolute;
  top:50%;
  left:50%;
  transform: translate(-50%);
  
  
}
.spinner .double-bounce1, .double-bounce2 {
    width: 25px;
    height: 25px;
    border-radius: 50%;
    background-color: #999999;
    opacity: 0.6;
    position: absolute;
    top: 0;
    left: 0;
    -webkit-animation: bounce 2.0s infinite ease-in-out;
    animation: bounce 2.0s infinite ease-in-out;
  }
.spinner .double-bounce2 {
    -webkit-animation-delay: -1.0s;
    animation-delay: -1.0s;
  }

 
@-webkit-keyframes bounce {
  0%, 100% { -webkit-transform: scale(0.0) }
  50% { -webkit-transform: scale(1.0) }
}
 
@keyframes bounce {
  0%, 100% {
    transform: scale(0.0);
    -webkit-transform: scale(0.0);
  } 50% {
    transform: scale(1.0);
    -webkit-transform: scale(1.0);
  }
}
</style>

index.js

import Vue from 'vue'
import loadingComponent from '@/components/loading/index.vue'

const LoadingConstructor = Vue.extend(loadingComponent)

const instance = new LoadingConstructor({
  el: document.createElement('div')
})

instance.show = false // 默认隐藏
const loading = {
  show() { // 显示方法
    instance.show = true
    document.body.appendChild(instance.$el)
  },
  hide() { // 隐藏方法
    instance.show = false
  }
}

export default {
  install() {
    if (!Vue.$loading) {
      Vue.$loading = loading
    }
    Vue.mixin({
      created() {
        this.$loading = Vue.$loading
      }
    })
  }
}

2.全局引入

import loading from './components/loading/index.js' 
Vue.use(loading) 

3.使用

this.$loading.show()//打开
this.$loading.hide()//关闭