preact-arco-design/es/_util/throttleByRaf.js

Arco Design React UI Library.

var __read = this && this.__read || function (o, n) {
  var m = typeof Symbol === "function" && o[Symbol.iterator];
  if (!m) return o;
  var i = m.call(o),
      r,
      ar = [],
      e;

  try {
    while ((n === void 0 || n-- > 0) && !(r = i.next()).done) {
      ar.push(r.value);
    }
  } catch (error) {
    e = {
      error: error
    };
  } finally {
    try {
      if (r && !r.done && (m = i["return"])) m.call(i);
    } finally {
      if (e) throw e.error;
    }
  }

  return ar;
};

var __spreadArray = this && this.__spreadArray || function (to, from, pack) {
  if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {
    if (ar || !(i in from)) {
      if (!ar) ar = Array.prototype.slice.call(from, 0, i);
      ar[i] = from[i];
    }
  }
  return to.concat(ar || Array.prototype.slice.call(from));
};

import { raf, caf } from "./raf";
export default function (cb) {
  var timer = null;

  var throttle = function throttle() {
    var args = [];

    for (var _i = 0; _i < arguments.length; _i++) {
      args[_i] = arguments[_i];
    }

    timer && caf(timer);
    timer = raf(function () {
      cb.apply(void 0, __spreadArray([], __read(args), false));
      timer = null;
    });
  };

  throttle.cancel = function () {
    caf(timer);
    timer = null;
  };

  return throttle;
}