Function throttle

packages/core/src/utils/ColorPicker.ts:1181–1193

(func, wait, debounce)

  }

  function throttle(func, wait, debounce) {
    var timeout;
    return function () {
      var context = this,
        args = arguments;
      var throttler = function () {
        timeout = null;
        func.apply(context, args);
      };
      if (debounce) clearTimeout(timeout);
      if (debounce || !timeout) timeout = setTimeout(throttler, wait);
    };
  }

  function inputTypeColorSupport() {
    return $.fn.spectrum.inputTypeColorSupport();