为什么我的点击事件在jquery中调用两次? [英] Why is my click event called twice in jquery?
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问题描述
为什么我的点击事件在jquery中被触发两次?
HTML
< ul class = submenu>
< li>< label for = toggle>< input id = toggle type = checkbox checked> Show< / label>< / li>
< / ul>
Javascript
$(ul.submenu li:contains('Show'))。on(click,function(e){
console.log(toggle);
if ($(this).find([type = checkbox])。is(:checked))console.log(Show);
else console.log(Hide);
});
这是我在控制台中得到的:
toggle menu.js:39
显示menu.js:40
toggle menu.js:39
隐藏menu.js:41
> $(ul.submenu li:contains('Show'))
[< li>]
< label for =toggle>
< input id =toggletype =checkboxchecked>
显示
< / label>
< / li>
解决方案如果我记得正确,我至少在一些浏览器上看到这种行为,
标签 触发点击
标签
输入。
因此,如果忽略
e.tTarget.tagName
是LABEL
,你只会得到一个事件。至少,这是我在测试中得到的:
Why is my click event fired twice in jquery?
HTML
<ul class=submenu>
<li><label for=toggle><input id=toggle type=checkbox checked>Show</label></li>
</ul>
Javascript
$("ul.submenu li:contains('Show')").on("click", function(e) {
console.log("toggle");
if ($(this).find("[type=checkbox]").is(":checked")) console.log("Show");
else console.log("Hide");
});
This is what I get in console:
toggle menu.js:39
Show menu.js:40
toggle menu.js:39
Hide menu.js:41
> $("ul.submenu li:contains('Show')")
[<li> ]
<label for="toggle">
<input id="toggle" type="checkbox" checked>
"Show"
</label>
</li>
解决方案
If I remember correctly, I've seen this behavior on at least some browsers, where clicking the label
both triggers a click on the label
and on the input
.
So if you ignore the events where e.tTarget.tagName
is "LABEL"
, you'll just get the one event. At least, that's what I get in my tests:
- Example with both events | Source
- Example filtering out the
e.target.tagName = "LABEL"
ones | Source
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