@z-cloud/virtual-vanilla/dist/cjs/utils.cjs

提供跨平台（浏览器，小程序）的虚拟列表公共基类

"use strict";
Object.defineProperty(exports, Symbol.toStringTag, { value: "Module" });
const canUseDom = !!(typeof window !== "undefined" && window.document && window.document.createElement);
function isEqual(next, previous) {
  if (next === previous) {
    return true;
  }
  if (Number.isNaN(next) && Number.isNaN(previous)) {
    return true;
  }
  return false;
}
function compare(next, previous) {
  if (next.length !== previous.length) {
    return false;
  }
  for (let i = 0; i < next.length; i++) {
    if (!isEqual(next[i], previous[i])) {
      return false;
    }
  }
  return true;
}
function memoFnResult(memoFn, isEqual2 = compare) {
  let cache = null;
  function memoized(...args) {
    if (cache && cache.prevThis === this && isEqual2(args, cache.prevArgs)) {
      return cache.prevResult;
    }
    const result = memoFn.apply(this, args);
    cache = {
      prevResult: result,
      prevArgs: args,
      prevThis: this
    };
    return result;
  }
  memoized.clear = function clear() {
    cache = null;
  };
  return memoized;
}
const debounce = (fn, wait) => {
  let timeoutId;
  return function(targetWindow, ...args) {
    targetWindow.clearTimeout(timeoutId);
    timeoutId = targetWindow.setTimeout(() => fn.apply(this, args), wait);
  };
};
exports.canUseDom = canUseDom;
exports.debounce = debounce;
exports.memoFnResult = memoFnResult;