botframework-webchat-component/lib/Utils/debounce.js

React component of botframework-webchat

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = createDebounce;

function _toConsumableArray(arr) { return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _unsupportedIterableToArray(arr) || _nonIterableSpread(); }

function _nonIterableSpread() { throw new TypeError("Invalid attempt to spread non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }

function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }

function _iterableToArray(iter) { if (typeof Symbol !== "undefined" && Symbol.iterator in Object(iter)) return Array.from(iter); }

function _arrayWithoutHoles(arr) { if (Array.isArray(arr)) return _arrayLikeToArray(arr); }

function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }

var DEFAULT_DEBOUNCE_INTERVAL = 1000;

function setTimeoutOrSync(fn, ms) {
  if (ms > 0) {
    return setTimeout(fn, ms);
  }

  fn();
}

function createDebounce(fn) {
  var ms = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : DEFAULT_DEBOUNCE_INTERVAL;
  var scheduled;
  var lastCall = 0;
  var nextArguments;
  return function debounce() {
    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
      args[_key] = arguments[_key];
    }

    nextArguments = args;

    if (!scheduled) {
      scheduled = setTimeoutOrSync(function () {
        lastCall = Date.now();
        fn.apply(void 0, _toConsumableArray(nextArguments));
        scheduled = null;
      }, lastCall + ms - Date.now());
    }
  };
}
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