获取所有匹配元素的数据属性？

Question

Say I have HTML like below:

<div class="test" data-file="1"></div>
<div class="test" data-file="2"></div>

I would like to get a list of all the data-file values. I tried using, $(.test).data("file") but this only returns 1 which makes sense according to jQuery's documentation which states it will return ...the value at the named data store for the first element in the set of matched elements.

Emphasis on first .

Is there any way to tell jQuery to pull all of the data values into an array?

Answer 1

Of course! Use .map

var dataValues = $(".test[data-file]").map(function() {
    return $(this).data("file");
}).get();

Fiddle: http://jsfiddle.net/5muq33of/

Answer 2

You can create temporary array for that purpose:

var myArray = [];
$('.test').each( function() {
    myArray.push( $( this ).data( 'file' ) );
}); 
console.log( myArray );

Answer 3

 var dataValues = $(".test[data-file]").map(function() { return $(this).data("file"); }).get(); console.log(dataValues); 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script> <div class="test" data-file="1"></div> <div class="test" data-file="2"></div>