vars 引用的多个元素的 jquery on('click') 处理程序

2022-01-15 00:00:00 event-handling jquery javascript

注意我知道我添加了 id 并将它们组合在一个选择器中，例如#myDiv1,#myDiv2"所以请不要提出这个建议，因为它与我的问题无关.

N.B. I'm aware that I add ids and combine these in a selector e.g. "#myDiv1,#myDiv2" so please refrain from suggesting this as it does not relate to my question.

有没有办法在一个 on() 声明中将下面的变量链接"在一起，可能是一个数组或其他东西?

Is there a way to 'chain' the vars below together in one on() declaration maybe as an array or something?

var myDiv1 = $('<div>Something here</div>');
var myDiv2 = $('<div>Something else here</div>');

myDiv1.on('click', function(){ doSomething();});
myDiv2.on('click', function(){ doSomething();});

我有一堆变量，我需要对鼠标事件进行一些广泛的跟踪，并且像上面的示例一样单独设置它们感觉很混乱.

I have a bunch of vars that I need to do some broad tracking of mouse events and it feels messy setting them up individually like the above example.

推荐答案

  • 您可以将 DOM 元素数组传递给 jQuery 函数:

    $([
    myDiv1.get(0), 
    myDiv2.get(0)
]).on('click', function(){ doSomething();});

    jsFiddle 演示

    另一种可能的方法是使用 .add() 方法:

    Another possible way is to use the .add() method:

    myDiv1.add(myDiv2).on('click', function(){ doSomething();});

    jsFiddle 演示

    将它们放在一个数组中，遍历它们并附加相同的处理程序.我使用 ES5 forEach 制作了示例，但您可以随意使用简单的 for 循环或 $.each.

    Put them in an array, loop through them and attach the same handler. I made the example with ES5 forEach, but feel free to use a simple for loop or $.each.

    [cucc, gomb].forEach(function (el) {
    el.on('click', handler);
});

    jsFiddle 演示

    如果它们有共同的祖先，则在它们上放置一个共同的类并使用事件委托.根据您的元素数量，这可能是性能方面的最佳解决方案，因为您只需将一个处理程序附加到共同祖先.

    If they have a common ancestor, put a common class on them and use event delegation. Depending on the number of your elements, this could be the best solution performance-wise, because you only have to attach one handler to the common ancestor.

    $('.ancestor').on('click', '.common', handler);

    jsFiddle 演示

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