按钮中的文本进入 :before 状态

Question

我正在使用此 codepen 中的第三个按钮。

.btn {
    line-height: 50px;
    height: 50px;
    text-align: center;
    width: 250px;
    cursor: pointer;
}    
.btn-three {
        color: #FFF;
        transition: all 0.5s;
        position: relative;
    }
    .btn-three::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        z-index: 1;
        background-color: rgba(0,0,0,1);
        transition: all 0.3s;
    }
    .btn-three:hover::before {
        opacity: 0 ;
        transform: scale(0.5,0.5);
    }
    .btn-three::after {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        z-index: 1;
        opacity: 0;
        transition: all 0.3s;
        border: 1px solid rgba(255,255,255,0.5);
        transform: scale(1.2,1.2);
    }
    .btn-three:hover::after {
        opacity: 1;
        transform: scale(1,1);
    }

每当我将按钮背景的不透明度更改为完全黑色时，文本在 :before 状态下完全消失。

有什么原因吗？似乎文本与按钮在同一个 'layer' 中，而不是在按钮上方

Answer 1

如果你想保持黑色不透明度并让文本一直到前面，那么你需要 "force" 使用 z-index

将文本放在前面

.btn-three span {
    z-index: 2; 
    display: block;
    position: absolute;
    width: 100%;
    height: 100%;   
}

.btn-three::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  background-color: rgba(0,0,0,1);
  transition: all 0.3s;
}

如果不将跨度设置在 div 以上，您的文本将始终落后于它，因为您的 ::before 状态的 z-index 设置在文本上方。

这将始终使它消失，将 z-index 设置为 -1 会将它发送到后面，但它不会再使您的块变黑

.btn-three::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background-color: rgba(0,0,0,1);
  transition: all 0.3s;
}

Answer 2

我建议将锚点 link 移到按钮标签之外，并使用 z-index 将文本强制放在前面。

CSS:

.btn-three {
  transition: all 0.5s;
  position: relative;
  line-height: 25px;
  height: 50px;
  align-items: center;
  text-align: center;
  width: 250px;
  cursor: pointer;
}


.btn-three::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    background-color: rgba(16, 84, 35, 1);
    transition: all 0.3s;
}
.btn-three:hover::before {
    opacity: 0 ;
    transform: scale(0.5,0.5);
}
.btn-three::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: all 0.3s;
    border: 1px solid rgba(0, 0, 0, 0.5);
    transform: scale(1.2,1.2);
    z-index: 2;
}

.three-text {
    position: relative;
    margin-top: -10px;
    z-index: 1;
    display: block;
}

.btn-three:hover::after {
    opacity: 1;
    transform: scale(1,1);
}

.button-wrapper {
    padding-top: 3%;
    text-align: center;
    padding-bottom: 3%;
}

HTML:

<div class="button-wrapper">
  <button class="btn btn-three" />
  <a class="three-text">HERE YOUR TEXT</a>
 </div>

Codepen example

按钮中的文本进入 :before 状态

Text in button gone in :before state

html

css

button

hover