使用线性渐变作为背景的响应式闪耀动画

Responsive shine animation using linear-gradient as background

我想创建一个闪光加载动画,它将出现在具有不同背景颜色的多个元素上。

目前,我正在使用 background-image 渐变,并使用 vw 单位为 background-position 设置动画,但它不可缩放,我的元素将有不同的长度。

有什么方法可以用百分比单位为 background-image 设置动画?

创建的动画

body {
  background: black;
}

header {
  width: 100%;
  height: 50px;
  background-color: rebeccapurple;
  background-image: linear-gradient(
    to right,
    transparent 0%,
    rgba(255,255,255,0.3) 50%,
    transparent 100%
  );
  background-repeat: no-repeat;
  background-position: -100vw;
  animation: shine 2s infinite;
}

@keyframes shine {
  0% {
    background-position: -100vw;    
  }
  100% {
    background-position: 100vw;   
  }
}
<header></header>

一个想法是让渐变的大小比容器大3倍,然后给它的中间部分着色,然后从左向右滑动它:

body {
  background: black;
}

.box {
  height: 50px;
  margin:5px;
  background: 
    linear-gradient(90deg,#0000 33%,rgba(255,255,255,0.3) 50%,#0000 66%)
    rebeccapurple;
  background-size:300% 100%;
  animation: shine 2s infinite;
}

@keyframes shine {
  0% {
    background-position: right;    
  }
  /*100% {
    background-position: left; it's the default value, no need to define it
  }*/
}
<div class="box"></div>

<div class="box" style="width:60%"></div>

<div class="box" style="width:40%"></div>

不同动画的另一种选择:

body {
  background: black;
}

.box {
  height: 50px;
  margin:5px;
  background: 
    repeating-linear-gradient(90deg,#0000 0,rgba(255,255,255,0.3) 25%,#0000 50%)
    rebeccapurple;
  background-size:200% 100%;
  animation: shine 1s infinite linear;
}

@keyframes shine {
  0% {
    background-position: right;    
  }
}
<div class="box"></div>

<div class="box" style="width:60%"></div>

<div class="box" style="width:40%"></div>

相关问题:Using percentage values with background-position on a linear-gradient