xdesign-vue-next/lib/hooks/useElementLazyRender.js

XDesign Component for vue-next

/**
 * xdesign v1.0.6
 * (c) 2023 xdesign
 * @license MIT
 */

import { ref, onMounted, watch, onBeforeUnmount } from 'vue';
import observe from '../_common/js/utils/observe.js';

function useElementLazyRender(labelRef, lazyLoad) {
  var ioObserver = ref();
  var showElement = ref(true);
  var handleLazyLoad = function handleLazyLoad() {
    if (!lazyLoad.value) return;
    showElement.value = false;
    var io = observe(labelRef.value, null, function () {
      showElement.value = true;
    }, 10);
    ioObserver.value = io;
  };
  onMounted(handleLazyLoad);
  lazyLoad.value && watch([lazyLoad], handleLazyLoad);
  onBeforeUnmount(function () {
    var _ioObserver$value;
    if (!lazyLoad.value) return;
    (_ioObserver$value = ioObserver.value) === null || _ioObserver$value === void 0 ? void 0 : _ioObserver$value.unobserve(labelRef.value);
  });
  return {
    showElement: showElement
  };
}

export { useElementLazyRender as default, useElementLazyRender };
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