jQuery loop through data() object

Question

Is it possible to loop through a data() object?

Suppose this is my code:

$('#mydiv').data('bar','lorem');  
$('#mydiv').data('foo','ipsum');  
$('#mydiv').data('cam','dolores');

How do I loop through this? Can each() be used for this?

Solution 1

jQuery stores all the data information in the jQuery.cache internal variable. It is possible to get all the data associated with a particular object with this simple but helpful plugin:

jQuery.fn.allData = function() {
    var intID = jQuery.data(this.get(0));
    return(jQuery.cache[intID]);
};

With this in place, you can do this:

$('#myelement').data('test1','yay1')
               .data('test2','yay2')
               .data('test3','yay3');

$.each($('#myelement').allData(), function(key, value) {
    alert(key + "=" + value);
});

You could just use matt b's suggestion but this is how to do it with what you have right now.

Solution 2

$.each($.data(this), function(i, e) {
   alert('name='+ i + ' value=' +e);
});

This will iterate through each property in 'this' element's data object.

Solution 3

Tested with jQuery 1.4 and tips from @user292614 the following works:

$('#mydiv').data('bar','lorem');  
$('#mydiv').data('foo','ipsum');  
$('#mydiv').data('cam','dolores');

$.each( $('#mydiv').data(),function(i, e) {
   alert('name='+ i + ' value=' +e);
});

Solution 4

I don't think that there is any function that gives you all of the "keys" of the data that has been added with the data() function, but instead, why not put all of your data into the function under an object / map?

something like this:

var container = new Object();
container.bar = "lorem";
container.foo = "ipsum";
container.cam = "dolores";
$("mydiv").data("container", container);

and then when you want to read the data / iterate through it:

var blah = $("mydiv").data("container");
for(key in blah) {
    var value = blah[key];
    //do whatever you want with the data, such as:
    console.log("The value of ", key, " is ", value);
}

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Comments

[matt b]

If it's an internal variable, isn't that subject to change in later versions of jquery (probably without notice)?

[Paolo Bergantino]

I'm sure they could, but I'm not sure why they would. Any retooling they might do to the data functionality would likely include this functionality built-in anyways. I don't think it's really a valid reason to shy away from it, but I guess it's a concern to keep in mind.

[saluce]

This didn't work OOTB for me, I had to slightly modify it: $.each($('#mydiv').data(), function (i, e) { alert(i + ":" + e); });