react-lazyload/lib/utils/throttle.js

Lazyload your components, images or anything where performance matters.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = throttle;
/*eslint-disable */
function throttle(fn, threshhold, scope) {
  threshhold || (threshhold = 250);
  var last, deferTimer;
  return function () {
    var context = scope || this;

    var now = +new Date(),
        args = arguments;
    if (last && now < last + threshhold) {
      // hold on to it
      clearTimeout(deferTimer);
      deferTimer = setTimeout(function () {
        last = now;
        fn.apply(context, args);
      }, threshhold);
    } else {
      last = now;
      fn.apply(context, args);
    }
  };
}