问题描述
< HTML>
< head>
< script type =text / javascriptsrc =jquery.js>< / script>
< script type =text / javascript>
$(document).ready(function(){
$(button)。click(function(){
$(h2
$(。test)。click(function() {
alert();
});
});
< / script>
< / head>
< body>
< h2>< / h2>
< button>生成新元素< / button>
< / body>
< / html>
我试图生成一个新的标签,类名为 test
在< h2>
中点击按钮。我还定义了一个与 test
相关联的点击事件。但是事件不起作用。
任何人都可以帮助?
p>您正在使用的 click()
绑定称为直接绑定,只会将处理程序附加到已经存在的元素。它将不会被绑定到将来创建的元素。要做到这一点,您必须使用。
以下是您要查找的内容:
var counter = 0; $ (button)。click(function(){$(h2)。append(< p class ='test'> click me+(++ counter)+< / p>) }); // With on():$(h2)。on(click,p.test,function(){alert($(this).text());}) code>
< script src =https://ajax.googleapis。 com / ajax / libs / jquery / 1.8.3 / jquery.min.js>< / script>< h2>< / h2>< button>生成新元素< / button>
上述适用于使用jQuery版本1.7+的用户。如果您使用的是较旧版本,请参阅以前的答案。
上一个答案:
尝试使用:
$(button)点击(function(){
$ (h2)。html(< p class ='test'>点击我< / p>)
});
$(。test)。live('click',function(){
alert('you clicked me!');
}) ;
为我工作与jsFiddle。
或者有一种新的方式做它与:
$(h2)。delegate(p,click,function(){
alert('you clicked me again! );
});
。
<html>
<head>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript">
$(document).ready(function() {
$("button").click(function() {
$("h2").html("<p class='test'>click me</p>")
});
$(".test").click(function(){
alert();
});
});
</script>
</head>
<body>
<h2></h2>
<button>generate new element</button>
</body>
</html>
I was trying to generate a new tag with class name test
in the <h2>
by clicking the button. I also defined a click event associated with test
. But the event doesn't work.
Can anyone help?
The click()
binding you're using is called a "direct" binding which will only attach the handler to elements that already exist. It won't get bound to elements created in the future. To do that, you'll have to create a "delegated" binding by using on()
.
Here's what you're looking for:
var counter = 0;
$("button").click(function() {
$("h2").append("<p class='test'>click me " + (++counter) + "</p>")
});
// With on():
$("h2").on("click", "p.test", function(){
alert($(this).text());
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<h2></h2>
<button>generate new element</button>
The above works for those using jQuery version 1.7+. If you're using an older version, refer to the previous answer below.
Previous Answer:
Try using live()
:
$("button").click(function(){
$("h2").html("<p class='test'>click me</p>")
});
$(".test").live('click', function(){
alert('you clicked me!');
});
Worked for me. Tried it with jsFiddle.
Or there's a new-fangled way of doing it with delegate()
:
$("h2").delegate("p", "click", function(){
alert('you clicked me again!');
});
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