Function throttle

MathBox/mathbox-bundle.js:40830–40848

* Creates a function that, when executed, will only call the `func` function * at most once per every `wait` milliseconds. Provide an options object to * indicate that `func` should be invoked on the leading and/or trailing edge * of the `wait` timeout. Subsequent calls to the throttl

(func, wait, options)

     * }));
     */
    function throttle(func, wait, options) {
      var leading = true,
          trailing = true;

      if (!isFunction(func)) {
        throw new TypeError;
      }
      if (options === false) {
        leading = false;
      } else if (isObject(options)) {
        leading = 'leading' in options ? options.leading : leading;
        trailing = 'trailing' in options ? options.trailing : trailing;
      }
      debounceOptions.leading = leading;
      debounceOptions.maxWait = wait;
      debounceOptions.trailing = trailing;

      return debounce(func, wait, debounceOptions);
    }

    /**
     * Creates a function that provides `value` to the wrapper function as its