<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title></title>
<script id="jquery_183" type="text/javascript" class="library" src="jquery-1.7.2.min.js"></script>
<script>
$(function(){
$('#username').bind('input propertychange', function() {
$('#result').html($(this).val().length + ' characters');
});
})
</script>
</head>
<body>
<h1 >
实时监测input中值的变化
</h1>
<input type="text" id="username" autoComplete='off'>
<div id="result"></div>
</body>
</html>
实时监测input中值的变化 --- bind()方法
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转载自blog.csdn.net/weixin_37580235/article/details/80734984
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