具有两个背景的动画按钮

Question

我正在尝试做同样的按钮，但不需要悬停（运行一直是动画背景）。

我尝试过不同的方法，例如使用背景剪辑、阴影等，但不幸的是没有成功。

也许如果我使用另一个元素，如 div 并且 span 可以工作，但我真的想用一个按钮来完成。

html,
body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100vh;
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  background: #000;
}

.glow-on-hover {
  width: 220px;
  height: 50px;
  border: none;
  outline: none;
  color: #fff;
  background: #111;
  cursor: pointer;
  position: relative;
  z-index: 0;
  border-radius: 10px;
}

.glow-on-hover:before {
  content: '';
  background: linear-gradient(45deg, #ff0000, #ff7300, #fffb00, #48ff00, #00ffd5, #002bff, #7a00ff, #ff00c8, #ff0000);
  position: absolute;
  top: -2px;
  left: -2px;
  background-size: 400%;
  z-index: -1;
  filter: blur(5px);
  width: calc(100% + 4px);
  height: calc(100% + 4px);
  animation: glowing 20s linear infinite;
  opacity: 0;
  transition: opacity .3s ease-in-out;
  border-radius: 10px;
}

.glow-on-hover:active {
  color: #000
}

.glow-on-hover:active:after {
  background: transparent;
}

.glow-on-hover:hover:before {
  opacity: 1;
}

.glow-on-hover:after {
  z-index: -1;
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  background: #111;
  left: 0;
  top: 0;
  border-radius: 10px;
}

@keyframes glowing {
  0% {
    background-position: 0 0;
  }
  50% {
    background-position: 400% 0;
  }
  100% {
    background-position: 0 0;
  }
}

<link href="https://fonts.googleapis.com/css?family=Roboto" rel="stylesheet">
<button class="glow-on-hover" type="button">HOVER ME, THEN CLICK ME!</button>

Answer 1

让 ::before 伪元素在未悬停时隐藏的原因是 opacity:0。如果删除它，您将获得所需的效果。此外，您可能希望删除 glow-on-hover:hover:before 选择器，因为它不会有任何用处。

具有两个背景的动画按钮

Animate button with two backgrounds

css

button