sso-ssr/components/common/nuxt-loading/Loading.vue

<template lang="html">
  <div class="loading" v-if="loading">
    <div class="wrap">
      <div class="outer"></div>
    </div>
  </div>
</template>
<script>
  export default {
    data: () => ({
      loading: false
    }),
    methods: {
      start () {
        this.loading = true
      },
      finish () {
        this.loading = false
      }
    }
  }
</script>
<style scoped>
  @keyframes spin {
    0%   { transform: rotate(360deg); }
    100% { transform: rotate(0deg); }
  }
  .wrap { width: 64px; height: 64px; position: absolute;left: 50%;top:50%;margin-left:-32px;margin-top: -32px; }
  .outer {
    background-repeat: no-repeat;
    background-size:100%; position: absolute; width: 100%; height: 100%; background-image: url('/images/all/loading.png'); animation: spin 800ms infinite linear; }
  .loading {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width:  100%;
    height: 100%;
    z-index: 1000;
    text-align: center;
  }
  .loading img {
    position: relative;
    top: 40%;
  }
</style>