JbSxs/code/node_modules/element-plus/es/hooks/use-throttle-render/index.mjs

import { ref, onMounted, watch } from 'vue';
import { isNumber, isUndefined } from '../../utils/types.mjs';
import { isObject } from '@vue/shared';

const useThrottleRender = (loading, throttle = 0) => {
  if (throttle === 0)
    return loading;
  const initVal = isObject(throttle) && Boolean(throttle.initVal);
  const throttled = ref(initVal);
  let timeoutHandle = null;
  const dispatchThrottling = (timer) => {
    if (isUndefined(timer)) {
      throttled.value = loading.value;
      return;
    }
    if (timeoutHandle) {
      clearTimeout(timeoutHandle);
    }
    timeoutHandle = setTimeout(() => {
      throttled.value = loading.value;
    }, timer);
  };
  const dispatcher = (type) => {
    if (type === "leading") {
      if (isNumber(throttle)) {
        dispatchThrottling(throttle);
      } else {
        dispatchThrottling(throttle.leading);
      }
    } else {
      if (isObject(throttle)) {
        dispatchThrottling(throttle.trailing);
      } else {
        throttled.value = false;
      }
    }
  };
  onMounted(() => dispatcher("leading"));
  watch(() => loading.value, (val) => {
    dispatcher(val ? "leading" : "trailing");
  });
  return throttled;
};

export { useThrottleRender };
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