Code:
<script src="http://code.jquery.com/jquery-latest.min.js" type="text/javascript"></script>
<script type="text/javascript">
$("#clicker").click(function () {
alert("Hello!");
$(".hide_div").hide();
});
</script>
上面的代码不起作用.当我点击#clicker时，它不会发出alert ，也不会隐藏.我判断了控制台，没有发现任何错误.我还判断了JQuery是否正在加载，事实上确实如此.所以我不确定问题是什么.我还做了一个带有alert 的文档准备功能，它工作得很好，不确定我做错了什么.请帮忙.谢谢
You are supposed to add the javascript code in a $(document).ready(function() {}); block.
即
$(document).ready(function() {
$("#clicker").click(function () {
alert("Hello!");
$(".hide_div").hide();
});
});
As jQuery documentation states: "A page can't be manipulated safely until the document is "ready." jQuery detects this state of readiness for you. Code included inside $( document ).ready() will only run once the page Document Object Model (DOM) is ready for JavaScript code to execute"