tdesign-vue/es/hooks/useElementLazyRender.js

tdesign-vue

/**
 * tdesign v1.14.1
 * (c) 2025 tdesign
 * @license MIT
 */

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

function useElementLazyRender(labelRef, lazyLoad) {
  var ioObserver = ref();
  var showElement = ref(!lazyLoad.value);
  var handleLazyLoad = function handleLazyLoad() {
    if (!lazyLoad.value || !labelRef.value || ioObserver.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, labelRef], handleLazyLoad);
  onBeforeUnmount(function () {
    var _ioObserver$value, _ioObserver$value$uno;
    if (!lazyLoad.value) return;
    (_ioObserver$value = ioObserver.value) === null || _ioObserver$value === void 0 || (_ioObserver$value$uno = _ioObserver$value.unobserve) === null || _ioObserver$value$uno === void 0 || _ioObserver$value$uno.call(_ioObserver$value, labelRef.value);
  });
  return {
    showElement: showElement
  };
}

export { useElementLazyRender as default, useElementLazyRender };
//# sourceMappingURL=useElementLazyRender.js.map