简单代码:
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<script type="text/javascript" src="http://code.jquery.com/jquery-
latest.min.js"></script>
<script type="text/javascript">
$("#target").keyup(function() {
alert("Handler for .keyup() called.");
});
</script>
</head>
<body>
<form>
<input id="target" type="text">
</form>
</body>
</html>
我可以输入输入字段,但不会显示警告。我也在Chrome和Mozilla中试过这个。
答案 0 :(得分:1)
您需要在文档完成加载后运行keyup函数
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<script type="text/javascript" src="http://code.jquery.com/jquery-
latest.min.js"></script>
<script type="text/javascript">
$(document).ready(function() {
$("#target").keyup(function() {
alert("Handler for .keyup() called.");
});
});
</script>
</head>
<body>
<form>
<input id="target" type="text">
</form>
</body>
</html>