悬停更改背景div

Question

我想使用JavaScript来更改悬停时div的背景和文本。但是我有一些问题。这是代码：

.square1 {
  width: 100px;
  height: 100px;
  border: 1px solid black;
  background: black;
  color: white;
}

.square2 {
  margin-top: 20px;
  width: 100px;
  height: 100px;
  border: 1px solid black;
  background: blue;
  color: white;
}

<div class="squares">
  <div class="square1">
    <p>I'm square1!</p>
  </div>

  <div class="square2">
    <p>I'm square2!</p>
  </div>
</div>

我最后要做的是使第一个正方形在悬停时显示为第二个正方形。有人可以帮我吗？

Answer 1

.square1 {
  width: 100px;
  height: 100px;
  border: 1px solid black;
  background: black;
  color: white;
}

.square1:hover {
  margin-top: 20px;
  width: 100px;
  height: 100px;
  border: 1px solid black;
  background: blue;
  color: white;
}

.square2 {
  margin-top: 20px;
  width: 100px;
  height: 100px;
  border: 1px solid black;
  background: blue;
  color: white;
}

.square2:hover {
  width: 100px;
  height: 100px;
  border: 1px solid black;
  background: black;
  color: white;
}

<div class="squares">
  <div class="square1">
    <p>I'm square1!</p>
  </div>

  <div class="square2">
    <p>I'm square2!</p>
  </div>
</div>

Answer 2

这就是您所需要的：

.square1:hover {
      background:blue;
      color:white;
      /* or any other props*/
}

Answer 3

var w;
function a(e)
{
w=e.textContent;
e.textContent=document.querySelector('.square2 > p').textContent

}
function b(e)
{
e.textContent=w
}

.square1 {
  width: 100px;
  height: 100px;
  border: 1px solid black;
  background: black;
  color: white;
}

.square1:hover {
  margin-top: 20px;
  width: 100px;
  height: 100px;
  border: 1px solid black;
  background: blue;
  color: white;
}

.square2 {
  margin-top: 20px;
  width: 100px;
  height: 100px;
  border: 1px solid black;
  background: blue;
  color: white;
}

.square2:hover {
  width: 100px;
  height: 100px;
  border: 1px solid black;
  background: black;
  color: white;
}

<div class="squares">
  <div class="square1" onmouseover='a(this)' onmouseout='b(this)'>
    <p>I'm square1!</p>
  </div>

  <div class="square2">
    <p>I'm square2!</p>
  </div>
</div>

Answer 4

如 Prince 或 Maheer Ali 所述；如果想让它具有更好的淡入淡出效果，请添加到CSS中：

-webkit-transition: all .3s ease;
-moz-transition: all .3s ease-in-out;
transition: all .3s ease-in-out;