Скелет

<template>
  <div>
    <div class="d-flex align-items-center mb-3">
      <b-progress class="w-100" :max="maxLoadingTime" height="1.5rem">
        <b-progress-bar :value="loadingTime" :label="`${((loadingTime / maxLoadingTime) * 100).toFixed(2)}%`"></b-progress-bar>
      </b-progress>

      <b-button class="ml-3" @click="startLoading()">Перезагрузить</b-button>
    </div>

    <b-skeleton-wrapper :loading="loading">
      <template #loading>
        <b-card>
          <b-skeleton width="85%"></b-skeleton>
          <b-skeleton width="55%"></b-skeleton>
          <b-skeleton width="70%"></b-skeleton>
        </b-card>
      </template>

      <b-card>
        Lorem ipsum dolor sit amet, consectetur adipiscing elit. Maecenas viverra nunc sapien,
        non rhoncus elit tincidunt vitae. Vestibulum maximus, ligula eu feugiat molestie,
        massa diam imperdiet odio, vitae viverra ligula est id nisi. Aliquam ut molestie est.
        Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac
        turpis egestas. Phasellus at consequat dui. Aenean tristique sagittis quam,
        sit amet sollicitudin neque sodales in.
      </b-card>
    </b-skeleton-wrapper>
  </div>
</template>

<script>
  export default {
    data() {
      return {
        loading: false,
        loadingTime: 0,
        maxLoadingTime: 3
      }
    },
    watch: {
      loading(newValue, oldValue) {
        if (newValue !== oldValue) {
          this.clearLoadingTimeInterval()

          if (newValue) {
            this.$_loadingTimeInterval = setInterval(() => {
              this.loadingTime++
            }, 1000)
          }
        }
      },
      loadingTime(newValue, oldValue) {
        if (newValue !== oldValue) {
          if (newValue === this.maxLoadingTime) {
            this.loading = false
          }
        }
      }
    },
    created() {
      this.$_loadingTimeInterval = null
    },
    mounted() {
      this.startLoading()
    },
    methods: {
      clearLoadingTimeInterval() {
        clearInterval(this.$_loadingTimeInterval)
        this.$_loadingTimeInterval = null
      },
      startLoading() {
        this.loading = true
        this.loadingTime = 0
      }
    }
  }
</script>

<!-- b-skeleton.vue -->

<h5>Text (default)</h5>
<b-skeleton></b-skeleton>

<h5 class="mt-3">Аватар</h5>
<b-skeleton type="avatar"></b-skeleton>

<h5 class="mt-3">Ввод</h5>
<b-skeleton type="input"></b-skeleton>

<h5 class="mt-3">Кнопка</h5>
<b-skeleton type="button"></b-skeleton>

<!-- b-skeleton-types.vue -->

<h5>Wave (по умолчанию)</h5>
<b-card>
  <b-skeleton animation="wave" width="85%"></b-skeleton>
  <b-skeleton animation="wave" width="55%"></b-skeleton>
  <b-skeleton animation="wave" width="70%"></b-skeleton>
</b-card>

<h5 class="mt-3">Fade</h5>
<b-card>
  <b-skeleton animation="fade" width="85%"></b-skeleton>
  <b-skeleton animation="fade" width="55%"></b-skeleton>
  <b-skeleton animation="fade" width="70%"></b-skeleton>
</b-card>

<h5 class="mt-3">Throb</h5>
<b-card>
  <b-skeleton animation="throb" width="85%"></b-skeleton>
  <b-skeleton animation="throb" width="55%"></b-skeleton>
  <b-skeleton animation="throb" width="70%"></b-skeleton>
</b-card>

<h5 class="mt-3">Ничего</h5>
<b-card>
  <b-skeleton animation width="85%"></b-skeleton>
  <b-skeleton animation width="55%"></b-skeleton>
  <b-skeleton animation width="70%"></b-skeleton>
</b-card>

<!-- b-skeleton-animations.vue -->

<b-skeleton-table
  :rows="5"
  :columns="4"
  :table-props="{ bordered: true, striped: true }"
></b-skeleton-table>

<!-- b-skeleton-helper-table.vue -->

<b-row>
  <b-col>
    <b-skeleton-img></b-skeleton-img>
  </b-col>
  <b-col>
    <b-skeleton-img></b-skeleton-img>
  </b-col>
  <b-col cols="12" class="mt-3">
    <b-skeleton-img no-aspect height="150px"></b-skeleton-img>
  </b-col>
</b-row>

<!-- b-skeleton-helper-img.vue -->

<b-row>
  <b-col cols="12" md="6">
    <h5>Image top</h5>
    <b-card no-body img-top>
      <b-skeleton-img card-img="top" aspect="3:1"></b-skeleton-img>
      <b-card-body>
        Lorem ipsum dolor sit amet, consectetur adipiscing elit. Maecenas viverra nunc sapien,
        non rhoncus elit tincidunt vitae.
      </b-card-body>
    </b-card>
  </b-col>
  <b-col cols="12" md="6">
    <h5>Image bottom</h5>
    <b-card no-body img-bottom>
      <b-card-body>
        Vestibulum maximus, ligula eu feugiat molestie, massa diam imperdiet odio, vitae viverra
        ligula est id nisi. Aliquam ut molestie est.
      </b-card-body>
      <b-skeleton-img card-img="bottom" aspect="3:1"></b-skeleton-img>
    </b-card>
  </b-col>
</b-row>

<b-row class="mt-md-3">
  <b-col cols="12" md="6">
    <h5>Image left</h5>
    <b-card no-body img-left>
      <b-skeleton-img card-img="left" width="225px"></b-skeleton-img>
      <b-card-body>
        Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis
        egestas. Phasellus at consequat dui.
      </b-card-body>
    </b-card>
  </b-col>
  <b-col cols="12" md="6">
    <h5>Image right</h5>
    <b-card no-body img-right>
      <b-skeleton-img card-img="right" width="225px"></b-skeleton-img>
      <b-card-body>
        Aenean tristique sagittis quam, sit amet sollicitudin neque sodales in.
      </b-card-body>
    </b-card>
  </b-col>
</b-row>

<!-- b-skeleton-helper-card-img.vue -->

<b-skeleton-icon
  icon="person"
  :icon-props="{ fontScale: 2 }"
></b-skeleton-icon>

<b-skeleton-icon
  icon="person-fill"
  :icon-props="{ fontScale: 2, variant: 'dark' }"
></b-skeleton-icon>

<!-- b-skeleton-helper-card-icon.vue -->