Javascript 在 JQuery 事件中查找父元素
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Find parent element in JQuery event
提问by ihkawiss
I've added a click event as follows and would like to check if the target has a specific parent.
我添加了一个点击事件，如下所示，并想检查目标是否有特定的父级。
$(document).click(function(event){
// Check here if target has specific parent for example -> #parent
});
How can this be done?
如何才能做到这一点？
回答by complex857
There's a .parent()dom traversal method for this.
有一个.parent()dom 遍历方法。
according to Pointy's crystal ball, you probably want to do something like this:
根据 Pointy 的水晶球，你可能想做这样的事情：
$(document).click(function(event) {
if ($(event.target).parents('.selector').length > 0) {
}
});
I'm not sure why are you set click handler on document, maybe looking for event delegation and the .on()?
我不确定你为什么要在文档上设置点击处理程序，也许是在寻找事件委托和.on()？
回答by Garet Claborn
I believe this also works.. AFAIK jQuery events use the the literal element instead of a jQuery object when calling events. Basically thisshould be your normal DOM element with normal JavaScript properties.
我相信这也有效.. AFAIK jQuery 事件在调用事件时使用文字元素而不是 jQuery 对象。基本上this应该是具有普通 JavaScript 属性的普通 DOM 元素。
$(document).click(function(event)
{
myparent = $(this.parentNode); //jquery obj
parent = $(this.parentNode)[0]; //plain DOM obj
myself = $(this); //jquery obj;
$elf = this; //plain DOM obj
});
Note: sometimes using 'self' as a variable is bad/causes conflicts with certain libraries so i used $elf. The $ in $elf is not special, like a jQuery convention or anything.
注意：有时使用“self”作为变量是不好的/会导致与某些库发生冲突，所以我使用了 $elf。$elf 中的 $ 并不特殊，就像 jQuery 约定或任何东西。
回答by Gabe
$(document).click(function(event){
var $parent = $(this).parent();
// test parent examples
if($parent.hasClass('someclass')) { // do something }
if($parent.prop('id') == 'someid')) { // do something }
// or checking if this is a decendant of any parent
var $closest = $(this).closest('someclass');
if($closest.length > 0 ) { // do something }
$closest = $(this).closest('#someid');
if($closest.length > 0 ) { // do something }
});
回答by Andrew Trice
I have reliably used this in the past:
我过去可靠地使用过这个：
var target = $( event.target )
This will give you a reference to the jQuery object for the element that had the event invoked. You could use this same approach and see if the parent is "#parent", something like this:
这将为您提供对调用该事件的元素的 jQuery 对象的引用。您可以使用相同的方法并查看父级是否为“#parent”，如下所示：
var target = $( event.target )
if (target.parent().attr('id') == "#parent") {
//do something
}
