1:定位+伪元素
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<div class="bag">
<div class="a">
文字文字文字文字文字文字文字文字文字文字
</div>
</div>
<style>
.bag {
width: 1000px;
height: 500px;
position: relative;
background: rgba(255, 255, 255, 0.3);
}
.a::before {
position: absolute;
top: 0;
left: 0;
bottom: 0;
right: 0;
background: url(http://csssecrets.io/images/tiger.jpg) center no-repeat;
width: 1000px;
height: 500px;
content: "";
z-index: -1;
}
</style>
</body>
</html>
2:定位+蒙版
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<div class="bag">
<div class="a">
文字文字文字文字文字文字文字文字文字文字
</div>
</div>
<style>
.bag {
background-size: cover;
width: 1000px;
height: 500px;
background: url(http://csssecrets.io/images/tiger.jpg) center no-repeat;
position: relative;
}
.a {
position: absolute;
top: 0;
left: 0;
bottom: 0;
right: 0;
width: 1000px;
height: 500px;
background: rgba(255, 255, 255, 0.3);
}
</style>
</body>
</html>