yiyunjianzhuBeta/node_modules/vuetify/lib/mixins/bootable/index.js

// Utilities
import { removed } from '../../util/console'; // Types

import Vue from 'vue';
/**
 * Bootable
 * @mixin
 *
 * Used to add lazy content functionality to components
 * Looks for change in "isActive" to automatically boot
 * Otherwise can be set manually
 */

/* @vue/component */

export default Vue.extend().extend({
  name: 'bootable',
  props: {
    eager: Boolean
  },
  data: () => ({
    isBooted: false
  }),
  computed: {
    hasContent() {
      return this.isBooted || this.eager || this.isActive;
    }

  },
  watch: {
    isActive() {
      this.isBooted = true;
    }

  },

  created() {
    /* istanbul ignore next */
    if ('lazy' in this.$attrs) {
      removed('lazy', this);
    }
  },

  methods: {
    showLazyContent(content) {
      return this.hasContent && content ? content() : [this.$createElement()];
    }

  }
});
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