#myElement {
width: 50px;
height: 300px;
background: linear-gradient(0deg, #4a94cd, #fe49a6);
display: flex;
flex-direction: column;
justify-content: space-evenly;
}
#myBar {
width: 100%;
height: 10px;
background: #000;
}<div id="myElement">
<div id="myBar"></div>
<div id="myBar"></div>
<div id="myBar"></div>
<div id="myBar"></div>
<div id="myBar"></div>
<div id="myBar"></div>
<div id="myBar"></div>
<div id="myBar"></div>
<div id="myBar"></div>
<div id="myBar"></div>
</div>我如何使黑色部分透明以显示后面的背景，背景不会总是白色的，可能是一张图片，颜色部分是整个的梯度
将div myBar的id属性更改为class，并将背景更改为白色。
我们可以使用第n个子选择器来定位每个myBar元素.myBar:nth child(1(，.myBar/nth child((2(等等。我在下面添加了一个示例。
我们还可以通过在css定义中添加background-image属性来使用图像作为背景。
#myElement {
width: 50px;
height: 300px;
background: linear-gradient(0deg, #4a94cd, #fe49a6);
display: flex;
flex-direction: column;
justify-content: space-evenly;
}
.myBar {
width: 100%;
height: 10px;
background: white;
}
.myBar:nth-child(1){
background:red;
}
----------
<div id="myElement">
<div class="myBar"></div>
<div class="myBar"></div>
<div class="myBar"></div>
<div class="myBar"></div>
<div class="myBar"></div>
<div class="myBar"></div>
<div class="myBar"></div>
<div class="myBar"></div>
<div class="myBar"></div>
<div class="myBar"></div>
</div>
我记得在你的另一篇帖子中看到你想制作进度条(你应该提到这些事情，让其他人更容易用相关答案回答(。您可能想要通过这个div动态地更改高度或其他什么(以模拟进度(。
您可以使用css属性clip-path来实现渐变和透明背景之间交替的效果：
.container {
background: url(https://picsum.photos/id/999/360);
padding: 20px;
width: 320px;
}
#myElement {
width: 50px;
height: 320px;
background: linear-gradient(0deg, #4a94cd, #fe49a6);
clip-path: polygon(
0 0,100% 0,100% 20px,0 20px,
0 30px,100% 30px,100% 50px,0 50px,
0 60px,100% 60px,100% 80px,0 80px,
0 90px,100% 90px,100% 110px,0 110px,
0 120px,100% 120px,100% 140px,0 140px,
0 150px,100% 150px,100% 170px,0 170px,
0 180px,100% 180px,100% 200px,0 200px,
0 210px,100% 210px,100% 230px,0 230px,
0 240px,100% 240px,100% 260px,0 260px,
0 270px,100% 270px,100% 290px,0 290px,
0 300px,100% 300px,100% 320px,0 320px
);
}<!--
I just added the container to show a background image behind
the element with the clip-path
-->
<div class="container">
<div id="myElement"></div>
</div>-
您可以使用svg屏蔽技术轻松创建它，因为使用div不起作用
-
正如您在运行片段时所看到的，图像位于svg后面，但由于黑色部分现在是透明的，因此看起来非常清晰
#myElement {
width: 50px;
height: 300px;
position: relative;
}
img{
position: absolute;
left: 0;
top: 0;
z-index: -1;
}<!DOCTYPE html>
<html lang="en">
<head>
<link rel="stylesheet" href="src/style.css">
</head>
<body>
<svg width="50" height="300" id="myElement">
<defs>
<linearGradient xl=0 x2=0 y1=0 y2=1 id="Gradient">
<stop stop-color="#fe49a6" offset="0%" />
<stop stop-color="#4a94cd" offset="100%" />
</linearGradient>
<pattern id="pattern" x="0" y="0" width="50" height="30" patternUnits="userSpaceOnUse">
<rect x=0 y=0 width=50 height=20 fill="#999" />
</pattern>
<mask id="mask-gradient" x="0" y="0" width="50" height="300">
<rect x="0" y="0" width="50" height="300" fill="url(#pattern)" />
</mask>
</defs>
<rect id="rect1" fill=url(#Gradient) x="0" y="0" width="50" height="300" mask="url(#mask-gradient)" />
</svg>
</div>
<img src="https://images.unsplash.com/photo-1667400104714-53da4894bf18?ixlib=rb-4.0.3&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=387&q=80">
</body>
</html>这是一个用于掩码的作业
#myElement {
width: 50px;
height: 300px;
background: linear-gradient(0deg, #4a94cd, #fe49a6);
-webkit-mask: linear-gradient(0deg,#0000 10px, #000 0) 0 0/100% 10%;
}
body {
background: orange;
}<div id="myElement">
</div>