详解css3 mask遮罩实现一些特效
(编辑：jimmy 日期: 2024/11/2 浏览：2)
遮罩mask的功能就是使用透明的图片或渐变遮罩元素的背景。于是，遮罩mask与背景background非常类似，除了没有color子属性，背景background剩下的6个子属性，mask都有 遮罩mask是一个复合属性，包括mask-image、mask-mode、mask-repeat、mask-position、mask-clip、mask-origin、mask-size、mask-composite这8个属性 注意: IE浏览器不支持，webkit内核的浏览器(包括chrome、safari、IOS、android)需要添加-webkit-前缀。要特别注意的是，firefox浏览器也支持webkit-mask属性
【mask-image】
默认值为none，值为透明图片，或透明渐变
【mask-repeat】
默认值为repeat，可选值与background-repeat相同
【mask-position】
默认值为0 0，可选值与background-position相同
【mask-clip】
默认值为border-box，可选值与background-clip相同
【mask-origin】
默认值为border-box，可选值与background-origin相同
【mask-size】
默认值为auto，可选值与background-size相同
【mask-mode】
默认值为match-source，可选值为alpha、luminance、match-source，或者它们的组合
【mask-composite】
默认值为add，可选值为add、subtract、intersect、exclude
[注意]只有firefox支持mask-mode和mask-composite
一，高斯模糊+mask遮罩
源码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
* {
padding: 0;
margin: 0;
}
html,
body {
height: 100vh;
width: 100vw;
}
body {
display: flex;
justify-content: center;
align-items: center;
flex-direction: column;
font-family: "Open Sans","PingFang SC","Microsoft YaHei","Helvetica Neue","Hiragino Sans GB","WenQuanYi Micro Hei",Arial,sans-serif;
}
@keyframes move {
0% {
background-position: 0 0;
}
50% {
background-position: 100% 0;
}
}
.bg {
background: url(https://sp-webfront.skypixel.com/skypixel/v2/public/website/assets/1535027674204-f6eca6369ec03e70262b58b0e25cda7b.jpg);
background-size: cover;
position: fixed;
top: -20px;
left: -20px;
right: -20px;
bottom: -20px;
filter: blur(15px);
z-index: -1;
}
.mask {
width: 340px;
height: 196px;
animation: move 40s infinite;
background-image: url(https://sp-webfront.skypixel.com/skypixel/v2/public/website/assets/1535027674204-f6eca6369ec03e70262b58b0e25cda7b.jpg);
background-size: cover;
-webkit-mask:
url(http://static.w3ctrain.com/upload_cae6fcb079f57792a47202cb67bbc04a-dji-seeklogo.com.svg);
-webkit-mask-size: cover;
}
</style>
</head>
<body>
<div class="bg"></div>
<div class="mask"></div>
</body>
</html>
二，窥见一点
源码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
.wrap{
position:absolute;
width: 400px;
border:1px solid black;
}
#mask{
height: 300px;
background:url(http://sandbox.runjs.cn/uploads/rs/142/wat3wtnz/dongzhi.jpg) lightblue;
-webkit-mask: url(http://sandbox.runjs.cn/uploads/rs/142/wat3wtnz/mask.png) no-repeat;
animation: 2s maskPosition infinite alternate ;
}
#mask:hover{
animation: none;
}
@keyframes maskPosition{
0%{-webkit-mask-position:0 0;}
100%{-webkit-mask-position:100% 100%;}
}
</style>
</head>
<body>
<div class="wrap">
<div id="mask"></div>
</div>
<script>
var oBox = document.getElementById('mask');
oBox.onmousemove = function(e){
e = e || event;
oBox.style.WebkitMaskPosition=(e.clientX-50)+"px "+ (e.clientY-50)+"px";
}
</script>
</body>
</html>
三，镂空效果
源码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
* {
box-sizing: border-box;
padding: 0;
margin: 0;
}
body {
background-image: linear-gradient(-45deg, #8067B7, #EC87C0);
min-height: calc(100vh - 40px);
margin: 20px;
font-family: 'Lato', sans-serif;
display: flex;
justify-content: center;
align-items: center;
}
.wrapper {
display: flex;
flex-direction: column;
align-items: center;
}
.mask {
width: 288px;
height: 176px;
background: url(http://static.w3ctrain.com/upload_dc601fca016e97ec2575565e7f0dcfb2-mask2.svg);
background-size: cover;
}
.ticket-mask {
width: 288px;
height: 176px;
-webkit-mask:
url(http://static.w3ctrain.com/upload_dc601fca016e97ec2575565e7f0dcfb2-mask2.svg);
mask-size: cover;
}
.ticket {
width: 288px;
height: 176px;
border-radius: 4px;
overflow: hidden;
background-image: linear-gradient(134deg, #3023AE 0%, #C86DD7 100%);
}
.info {
height: 120px;
background: url(http://static.w3ctrain.com/upload_9c0746a7eb377f304e733edc1effdb40-cover.jpeg);
padding: 24px 16px;
color: white;
}
h3 {
font-size: 24px;
line-height: 32px;
}
p {
margin: 16px 0 0 0;
}
button {
background: transparent;
appearance: none;
display: flex;
border: none;
height: 56px;
justify-content: center;
align-items: center;
width: 100%;
font-size: 14px;
color: white;
outline: none;
}
.symbol {
color: white;
font-size: 64px;
margin: 16px 40px;
}
.addend {
display: flex;
align-items: center;
}
@media (max-width: 800px) {
flex-direction: column
;
}
</style>
</head>
<body>
<div class="wrapper">
<div class="addend">
<div class="ticket">
<div class="info">
<h3>打骨折</h3>
<p>专治各种不服</p>
</div>
<button>
买买买
</button>
</div>
<span class="symbol">+</span>
<div class="mask"></div>
</div>
<span class="symbol">=</span>
<div class="ticket-mask">
<div class="ticket">
<div class="info">
<h3>打骨折</h3>
<p>专治各种不服</p>
</div>
<button>
买买买
</button>
</div>
</div>
</div>
</body>
</html>
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