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<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>div模拟textarea文本域轻松实现高度自适应</title>
<style>
h2{
text-align: center;
margin:50px auto;
}
.test_box {
width: 400px;
min-height: 20px;
max-height: 300px;
_height: 120px;
margin-left: auto;
margin-right: auto;
padding: 3px;
outline: 0;
border: 1px solid #a0b3d6;
font-size: 12px;
line-height: 24px;
padding: 2px;
word-wrap: break-word;
overflow-x: hidden;
overflow-y: auto;
border-color: rgba(82, 168, 236, 0.8);
box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1), 0 0 8px rgba(82, 168, 236, 0.6);
}
</style>
</head>
<body>
<h2>div模拟textarea文本域轻松实现高度自适应</h2>
<div class="test_box" contenteditable="true"><br /></div>
</body>
</html>
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