Question

我有一个按钮，但是当我将鼠标悬停在按钮上时，文本不想更改颜色（颜色更改类---- .active:hover）。由于某些奇怪的原因，它不想更改。另外，正如您在我的代码中看到的那样，我想将文本颜色更改为#fff（白色）。我经常使用:hover选择器，但不知道问题出在哪里！

body {
  font-family: "Exo 2", sans-serif;
  margin: 0;
  padding: 0;
  justify-content: center;
  height: 100vh;
  align-items: center;
}
.active {
  text-decoration: none;
  color: #000;
  position: relative;
  padding: 8px 30px;
  background: #fff;
  text-transform: uppercase;
  font-size: 15px;
  box-sizing: border-box;
  transition: 0.5s;
  border: 2px solid #000;
}
.active:before {
  content: '' ;
  position: absolute;
  top: 0;
  left: 0;
  width: 50%;
  height: 100%;
  background: #000;
  z-index: 1;
  transform: scaleX(0);
  transition: transform 0.5s;
  transform-origin: left;
}
.active:hover {
  color: #fff;
}
.active:hover:before {
  transform: scaleX(1);
  transition: transform 0.5s;
  transform-origin: right;
}
.active:after {
  content: '' ;
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 100%;
  background: #000;
  z-index: 1;
  transform: scaleX(0);
  transition: transform 0.5s;
  transform-origin: right;
}

.active:hover:after {
  transform: scaleX(1);
  transition: transform 0.5s;
  transform-origin: left;
}

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
</head>

<body>
       <a class="active" href="#">Login</a>
      
 </body>
</html>

Answer 1

您正在将:before元素放置在具有该z-index值的文本上。根据您拥有的所有变体，还包括按钮的背景，我建议您对文本使用<span>并在该元素上使用较高的z-index：

body {
  font-family: sans-serif;
  margin: 30px;
  text-align: center;
}

.active {
  text-decoration: none;
  color: #000;
  position: relative;
  padding: 8px 30px;
  background: #fff;
  font-size: 15px;
  transition: 0.5s;
  border: 2px solid #000;
}

.active span {
  position: relative;
  transition: color .3s linear;
  z-index: 2
}

.active:before,
.active:after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 50%;
  height: 100%;
  background: #000;
  z-index: 1;
  transform: scaleX(0);
  transition: transform 0.5s;
  transform-origin: left;
}

.active:after {
  left: auto;
  right: 0;
  transform-origin: right;
}

.active:hover span {
  color: #fff;
}

.active:hover:before,
.active:hover:after {
  transform: scaleX(1);
  transition: transform 0.5s;
}

<a class="active" href="#"><span>LOGIN</span></a>

Answer 2

仅使用背景色即可实现相同目的，而不再需要伪元素

body {
  font-family: "Exo 2", sans-serif;
}
.active {
  text-decoration: none;
  color: #000;
  position: relative;
  padding: 8px 30px;
  display:inline-block;
  margin:10px;
  background-image:
    linear-gradient(#fff,#fff),
    linear-gradient(#000,#000);
  background-size:100% 200%,0% 200%;
  background-position:left 50% top -100%,50% 50%;
  background-repeat:no-repeat;
  text-transform: uppercase;
  font-size: 15px;
  box-sizing: border-box;
  transition:background-size 0.5s,background-position 0s 0.5s;
  border: 2px solid #000;
}
.active:hover {
  color:#fff;
  background-size:0% 200%,800% 200%;
  background-position:50% 50%;
  transition:background-size 1s,background-position 0s 1s;
}

<a class="active" href="#">Login</a>

也这样：

body {
  font-family: "Exo 2", sans-serif;
}
.active {
  text-decoration: none;
  color: #000;
  position: relative;
  padding: 8px 30px;
  display:inline-block;
  margin:10px;
  background-image:
    linear-gradient(#000,#000),
    linear-gradient(#000,#000);
  background-size:0% 100%;
  background-position:left,right;
  background-repeat:no-repeat;
  text-transform: uppercase;
  font-size: 15px;
  box-sizing: border-box;
  transition:0.5s;
  border: 2px solid #000;
}
.active:hover {
  color:#fff;
  background-size:50.5% 100%;
}

<a class="active" href="#">Login</a>

也喜欢这个：

body {
  font-family: "Exo 2", sans-serif;
}
.active {
  text-decoration: none;
  color: #000;
  position: relative;
  padding: 8px 30px;
  display:inline-block;
  margin:10px;
  background-image:
    linear-gradient(#000,#000);
  background-size:0% 100%;
  background-position:center;
  background-repeat:no-repeat;
  text-transform: uppercase;
  font-size: 15px;
  box-sizing: border-box;
  transition:0.5s;
  border: 2px solid #000;
}
.active:hover {
  color:#fff;
  background-size:100% 100%;
}

<a class="active" href="#">Login</a>

此处有关值计算的更多详细信息：https://stackoverflow.com/a/51734530/8620333

将鼠标悬停在按钮上时，为什么按钮不起作用？

2 个答案: