Find elements by custom data attribute value

Question

I was wondering if there\'s a way to select an item (div,span,whatever..) using javascript with jQuery (+ jQuery UI lib) based on its data attribute value. For example, let\

Answer 1

var resultingElement = $('.b[data-myKey=1234]');

I'm not sure 100% sure, but I think there was an issue with camel-case selectors in data attributes at some point.

Answer 2

You can create a custom pseudo-selector to make things easy: http://jsfiddle.net/g2xKB/1/.

$.expr.pseudos.data = $.expr.createPseudo(function(args) {
    var items = args.split(",");  // the arguments (key, value)

    $.each(items, function(i, item) {
        item = item.trim();
        var isString = /^['"]|['"]$/.test(item);
        item = item.replace(/^['"]|['"]$/g, "");  // remove quotes

        if(!isString) {
            item = +item;  // if no quotes, it's a number
        }

        items[i] = item;
    });

    return function(elem) {
        return $.data(elem, items[0]) === items[1];
    }
});

You can then use it as follows:

$(".b:data('myKey', 1234)").css("color", "red");

Answer 3

Try this

    $("div.b").filter(function() { 
          return $.data(this, "myKey") == 1234; 
    });