javascript - 在窗口单击事件中访问元素及其子/后代

Question

在我的窗口事件中，如果指针点击父对象或其子对象/后代对象，它应该做一些事情。 问题是事件无法访问 parent 的 child 和孙子。条件存储在 targetIsInsideParent 变量中。

HTML

<div class="parent">
  Parent
  <div class="child">
    Child
    <div class="grandchild">
      GrandChild
    </div>
  </div>
</div>

JS

const parent = document.querySelector('.parent');

window.addEventListener('click', e => {
  const targetIsParent = e.target === parent;
  const targetIsInsideParent = e.target === parent.children; // !!!!

  if(targetIsParent || targetIsInsideParent) {
    console.log('Good');
  }
})

Answer 1

尝试使用 parent.contains(e.target) 或 parent.compareDocumentPosition(e.target) === 20

const parent = document.querySelector('.parent');

window.addEventListener('click', e => {
  const targetIsParent = e.target === parent;
  const targetIsInsideParent = parent.contains(e.target);
  // const targetIsInsideParent = parent.compareDocumentPosition(e.target) === 20; // alternative, but also works good
  if(targetIsParent || targetIsInsideParent) {
    console.log('Good');
  }
})

<div class="parent">
  Parent
  <div class="child">
    Child
    <div class="grandchild">
      GrandChild
    </div>
  </div>
</div>
<div>Other</div>