CSS按钮将线性渐变背景转换为透明背景

Question

我有一个带有线性渐变背景,橙色边框和一些文字的按钮.当我将鼠标悬停在按钮上时,我希望背景变为透明而不更改按钮的其他属性.

我试图将不透明度转换为0,但显然,这将隐藏边框和文本.我也尝试过转换背景,但它不起作用,因为我没有要转换到的端点,因为它需要透明.

body {
    background-color: darkblue;
}

.button {
    background-image: linear-gradient(red,yellow);
    border: solid orange 2px;
    border-radius: 10px;
    color: white;
    padding: 15px 25px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 24px;
}

<button class="button">Submit</button>

Answer 1

使用伪元素作为背景，您可以轻松地做到这一点：

body {
  background-color: darkblue;
}

.button {
  border: solid orange 2px;
  border-radius: 10px;
  color: white;
  padding: 15px 25px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 24px;
  position: relative;
  overflow: hidden;
  z-index:0;
  background:transparent;
}

.button::before {
  content: "";
  position: absolute;
  z-index:-1;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: linear-gradient(red, yellow);
  transition:1s;
}
.button:hover::before {
  opacity:0;
}

<button class="button">Submit</button>

这是不使用伪元素的另一种想法，您可以依赖于更改background-colorand background-size。诀窍是使一种渐变颜色保持透明，这样我们就可以看到background-color（您可以将其渐变为透明）。然后增加background-size来隐藏底色，我们只会看到透明色。

body {
  background-color: darkblue;
}

.button {
  border: solid orange 2px;
  background-image: linear-gradient(transparent, yellow);
  background-size:100% 100%;
  background-color:red;
  border-radius: 10px;
  color: white;
  padding: 15px 25px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 24px;
  transition:1s;
}

.button:hover {
  background-color:transparent;
  background-size:100% 500%;
}

<button class="button">Submit</button>

或考虑进行调整background-size以进行另一种过渡：

body {
  background-color: darkblue;
}

.button {
  border: solid orange 2px;
  background: 
    linear-gradient(red, yellow),
    transparent;
  background-size:100% 100%;
  background-position:left; /*change this to change the way the transtion happen*/
  background-repeat:no-repeat;
  border-radius: 10px;
  color: white;
  padding: 15px 25px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 24px;
  transition:1s;
}

.button:hover {
  background-size:0% 100%;
}

<button class="button">Submit</button>