<template>
  <transition name="animation">
    <div :style="{background:background}" v-if="visable" class="loaidng">
      <div>
        {{text}}
      </div>
    </div>
  </transition>
</template>
<script>
export default {
  data() {
    return {
      visable: false,
      text: "loading...",
      background: "rgba(0,0,0,.3)",
    };
  },
};
</script>
<style>
.animation-enter,
.animation-leave-to {
  opacity: 0;
}
.animation-enter-active,
.animation-leave-active {
  transition: opacity 0.6s;
}
.loaidng {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.3);
  display: flex;
  justify-content: center;
  align-items: center;
  color: #fff;
  font-size: 20px;
}
</style>

import Vue from 'vue'
import loading from './index.vue'
const $app = Vue.extend(loading)
const $loading = new $app().$mount(document.createElement('div'))
document.body.appendChild($loading.$el)
export default {
    install(vm) {
        vm.prototype.$loading = {
            show: (params) => {
                Object.keys(params).forEach(key => {
                    $loading[key] = params[key]
                })
                $loading.visable = true
            },
            hide: () => {
                $loading.visable = false
            }
        }
    }
}

import Vue from 'vue'
import App from './App.vue'
import router from './router'
import store from './store'
import $loading from '@/components/loading/index.js'
Vue.config.productionTip = false
Vue.use($loading)
new Vue({
  router,
  store,
  render: h => h(App)
}).$mount('#app')