无论如何,是否有for循环等待直到清除间隔

时间:2019-04-10 12:33:44

标签: javascript html node.js for-loop intervals

我有一个for循环,再次运行一个节点列表。我试图遍历节点列表并触发单击,然后设置间隔以等待弹出窗口,然后我要在弹出窗口中触发单击。

我的问题是我需要每次迭代都要等到弹出窗口被加载,然后单击弹出窗口中的项才能进行下一次迭代。希望这有道理。

这是我的代码。

let checkSteats = () => {
  const seats = document.querySelectorAll(seatSectionSelector);
  if (seats.length < maxSeatCount) {
    maxSeatCount = seats.length;
  }

  if (seats.length > 0) {

    [].forEach.call(seats, (seat, index) => {
  /**
   * WE NEED TO CLICK WAIT FOR A CHANGE IN THE RESPONSE OR POP UP BEFORE WE GO INTO THE NEXT ITERATION
   */
  console.log(seat)
  if ((index+1) <= maxSeatCount) {

    seat.dispatchEvent(
      new MouseEvent('click', {
        view: window,
        bubbles: true,
        cancelable: true,
        buttons: 1
      })
    );

    const popupInterval = setInterval(() => {
      const popupBtn = document.querySelector('.ticket-option__btn');

      if (popupBtn) {
        popupBtn.click();
        clearInterval(popupInterval);
      }
    }, 100)


  } 
}); 

} 
};

1 个答案:

答案 0 :(得分:2)

您想使用一个基本队列,在其中使用shift()从数组的前面拉出项目

var myArray = [1, 2, 3, 4]

function nextItem() {
  var item = myArray.shift();
  window.setTimeout(function() {
    console.log(item);
    if (myArray.length) nextItem();
  }, 1000)
}
nextItem()

因此,在您的情况下,清除间隔时将调用nextItem()。您可以通过将html集合转换为数组来获得转变

const seats = Array.from(document.querySelectorAll(seatSectionSelector));
function nextItem() {
  var seat = seats.shift();
  seat.dispatchEvent(...);
  const popupInterval = setInterval(() => {
    ...
    if (popupBtn) {
      ...
      if (seats.length) nextItem();
    }