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javascript - 依次单击两个元素

问题描述

需要编写一个 JS 或 jQuery，当单击第一个按钮时，它会向下滚动到一个<a>标签，然后单击该<a>标签。非常感谢任何帮助。下面的 HTML：

<a href="" id="reserveButton">Reserve Now</a>
<div class="spacerDiv"></div>
<a id='secondClick' href="http://www.google.ca" target="_blank">Click here again</a>

标签： javascriptjquery

解决方案

用于href="#secondClick"自动滚动页面，而不是简单地click()对所需元素执行 a：

const EL = sel => document.querySelector(sel);
EL("#reserveButton").addEventListener('click', () => {
  // Page is already scrolled at this point since we used #hash href
  // So just perform a click...
  EL("#secondClick").click();
});

<a href="#secondClick" id="reserveButton">Reserve Now</a>
<div class="spacerDiv" style="height: 200vh;">some space... scroll down</div>
<a id='secondClick' href="https://www.google.ca" target="_blank">Click here again</a>

https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener

如果你想使用更好的 UX（动画），你可以使用 JSElement.scrollIntoView()

const EL = sel => document.querySelector(sel);
const el_reserve = EL("#reserveButton");
const el_second = EL("#secondClick");

el_reserve.addEventListener('click', (evt) => {
  evt.preventDefault(); // Prevent default browser action
  el_second.scrollIntoView({behavior: "smooth"});
  el_reserve.__is_clicked = true;
});

new IntersectionObserver((entries, obs) => {
  if (el_reserve.__is_clicked && entries[0].isIntersecting) {
    el_second.click();  // Perform a click when element is in viewport
    el_reserve.__is_clicked = false; // reset
  }
}).observe(el_second);

<a href="#secondClick" id="reserveButton">Reserve Now</a>
<div class="spacerDiv" style="height: 200vh;">some space... scroll down</div>
<a id='secondClick' href="https://www.google.ca" target="_blank">Click here again</a>

jsBin 实例

https://developer.mozilla.org/en-US/docs/Web/API/Element/scrollIntoView
https://developer.mozilla.org/en-US/docs/Web/API/Intersection_Observer_API

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