<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
.box {
width: 100px;
height: 100px;
background-color: #1e347f;
}
.checkbox {
position: relative;
width: 18px;
height: 18px;
border: 1px solid #166ec0;
border-radius: 3px;
vertical-align: sub;
-webkit-appearance: none;
-moz-appearance: none;
}
.checkbox:checked {
background-color: transparent;
}
.checkbox:checked::after {
content: '';
position: absolute;
left: 3px;
top: 3px;
width: 9px;
height: 4px;
border: 2px solid #00ffff;
border-top: none;
border-right: none;
transform: rotate(-45deg);
}
</style>
</head>
<body>
<div class="box">
<input type="checkbox" value="aaa" class="checkbox" />
</div>
</body>
</html>
最后实现