达维营-前端网改变placeholder的值
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title></title>
<script src="//cdn.bootcss.com/jquery/1.11.3/jquery.min.js"></script>
</head>
<body>
<select name="menu1" id="sel">
<option selected value="">请选择</option>
<option value="百度">百度</option>
<option value="网易">网易</option>
<option value="新浪">新浪</option>
<option value="腾讯">腾讯</option>
<input type="text" value="" name="get" id="get" placeholder="请下拉选择" disabled="disabled">
<script>
$(document).ready(function () {
$("#sel").change(function () {
//alert(1);
var a = $(this).val();
//alert(a);
$("#get").val(a);
$("#get").attr('placeholder',a);
var b = $("#get").attr('placeholder');
alert("当前placeholder的值是："+b);
console.log("当前placeholder的值是："+b);
});
});
</script>
</body>
</html>