jQuery找不到元素
问题描述:
jQuery找不到任何元素. alert($("#testbutton").length);
每次显示0.
jQuery is not finding any elements. alert($("#testbutton").length);
displays 0 every time.
我做错什么了吗?
我的JS/jQuery代码:
(function ($) {
alert($("#testbutton").length);
}) (jQuery);
我的HTML:
<html>
<body>
<div id="header">
<div class="button" id="testbutton">Test</div>
</div>
</body>
</html>
答
代码运行时,DOM未准备好,因此该元素不存在.您是不是要这样做(将函数传递给jQuery是$(document).ready(fn)
的快捷方式):
When your code runs the DOM is not ready so the element doesn't exist. Did you mean to do this instead (passing a function to jQuery is a shortcut for $(document).ready(fn)
):
$(function () {
alert($("#testbutton").length);
});