text: const now = () => Date.now();
  const FUNC_ERROR_TEXT = 'Expected a function';
  
  /* Built-in method references for those with the same name as other `lodash` methods. */
  const nativeMax = Math.max, nativeMin = Math.min;
  
  /**
   * Creates a debounced function that delays invoking `func` until after `wait`
   * milliseconds have elapsed since the last time the debounced function was
   * invoked. The debounced function comes with a `cancel` method to cancel
   * delayed `func` invocations and a `flush` method to immediately invoke them.
   * Provide `options` to indicate whether `func` should be invoked on the
   * leading and/or trailing edge of the `wait` timeout. The `func` is invoked
   * with the last arguments provided to the debounced function. Subsequent
   * calls to the debounced function return the result of the last `func`
   * invocation.
   *
   * **Note:** If `leading` and `trailing` options are `true`, `func` is
   * invoked on the trailing edge of the timeout only if the debounced function
   * is invoked more than once during the `wait` timeout.
   *
   * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
   * until to the next tick, similar to `setTimeout` with a timeout of `0`.
   *
   * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
   * for details over the differences between `_.debounce` and `_.throttle`.
   */
  function debounce(func, wait) {
    let lastArgs,
      lastThis,
      maxWait,
      result,
      timerId,
      lastCallTime,
      lastInvokeTime = 0,
      leading = false,
      maxing = false,
      trailing = true;
  
    if (typeof func !== 'function') {
      throw new TypeError(FUNC_ERROR_TEXT);
    }
    wait = Number(wait) || 0;
  
    function invokeFunc(time) {
      let args = lastArgs,
        thisArg = lastThis;
  
      lastArgs = lastThis = undefined;
      lastInvokeTime = time;
      result = func.apply(thisArg, args);
      return result;
    }
  
    function leadingEdge(time) {
      // Reset any `maxWait` timer.
      lastInvokeTime = time;
      // Start the timer for the trailing edge.
      timerId = setTimeout(timerExpired, wait);
      // Invoke the leading edge.
      return leading ? invokeFunc(time) : result;
    }
  
    function remainingWait(time) {
      let timeSinceLastCall = time - lastCallTime,
        timeSinceLastInvoke = time - lastInvokeTime,
        timeWaiting = wait - timeSinceLastCall;
  
      return maxing
        ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke)
        : timeWaiting;
    }
  
    function shouldInvoke(time) {
      var timeSinceLastCall = time - lastCallTime,
        timeSinceLastInvoke = time - lastInvokeTime;
  
      // Either this is the first call, activity has stopped and we're at the
      // trailing edge, the system time has gone backwards and we're treating
      // it as the trailing edge, or we've hit the `maxWait` limit.
      return lastCallTime === undefined || timeSinceLastCall >= wait ||
        timeSinceLastCall < 0 || maxing && timeSinceLastInvoke >= maxWait;
    }
  
    function timerExpired() {
      let time = now();
      if (shouldInvoke(time)) {
        return trailingEdge(time);
      }
      // Restart the timer.
      timerId = setTimeout(timerExpired, remainingWait(time));
    }
  
    function trailingEdge(time) {
      timerId = undefined;
  
      // Only invoke if we have `lastArgs` which means `func` has been
      // debounced at least once.
      if (trailing && lastArgs) {
        return invokeFunc(time);
      }
      lastArgs = lastThis = undefined;
      return result;
    }
  
    function cancel() {
      if (timerId !== undefined) {
        clearTimeout(timerId);
      }
      lastInvokeTime = 0;
      lastArgs = lastCallTime = lastThis = timerId = undefined;
    }
  
    function flush() {
      return timerId === undefined ? result : trailingEdge(now());
    }
  
    function debounced() {
      let time = now(),
        isInvoking = shouldInvoke(time);
  
      lastArgs = arguments;
      lastThis = this;
      lastCallTime = time;
  
      if (isInvoking) {
        if (timerId === undefined) {
          return leadingEdge(lastCallTime);
        }
        if (maxing) {
          // Handle invocations in a tight loop.
          timerId = setTimeout(timerExpired, wait);
          return invokeFunc(lastCallTime);
        }
      }
      if (timerId === undefined) {
        timerId = setTimeout(timerExpired, wait);
      }
      return result;
    }
    debounced.cancel = cancel;
    debounced.flush = flush;
    return debounced;
  }
  
  export default debounce;
  