jquery on('click') handler for multiple elements referenced by vars

问题

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.

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();});

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.

回答1:

You can pass an array of DOM elements to the jQuery function:

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

jsFiddle Demo

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

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

jsFiddle Demo

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 Demo
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 Demo

来源：https://stackoverflow.com/questions/20276215/jquery-onclick-handler-for-multiple-elements-referenced-by-vars

标签

javascript

jquery

event-handling