Remove multiple html5 data-attributes with jquery

Question

So jquery api says the following:

Removing data from jQuery's internal .data() cache does not effect any HTML5 data- attributes in a document; use .removeAttr() to remove those.

I have no problem removing a single data-attribute.

<a title="title" data-loremIpsum="Ipsum" data-loremDolor="Dolor"></a>
$('a').removeAttr('data-loremipsum');

---

The question is, how can I remove multiple data-attributes?

More details:

1. The starting point is that I have multiple ( let's say.. 60 ) different data-attributes and I want to remove all of them.

2. Preferred way would be to target only those data-attributes that contain the word lorem. In this case lorem is always the first word. (or second if you count data-)

3. Also I'd like to keep all the other attributes intact

Solution 1

// Fetch an array of all the data
var data = $("a").data(),
    i;
// Fetch all the key-names
var keys = $.map(data , function(value, key) { return key; });
// Loop through the keys, remove the attribute if the key contains "lorem".
for(i = 0; i < keys.length; i++) {
    if (keys[i].indexOf('lorem') != -1) {
        $("a").removeAttr("data-" + keys[i]);
    }
}

Fiddle here: http://jsfiddle.net/Gpqh5/

Solution 2

In my jQuery placeholder plugin, I’m using the following to get all the attributes for a given element:

function args(elem) {
    // Return an object of element attributes
    var newAttrs = {},
        rinlinejQuery = /^jQuery\d+$/;
    $.each(elem.attributes, function(i, attr) {
        if (attr.specified && !rinlinejQuery.test(attr.name)) {
            newAttrs[attr.name] = attr.value;
        }
    });
    return newAttrs;
}

Note that elem is an element object, not a jQuery object.

You could easily tweak this, to get only data-* attribute names:

function getDataAttributeNames(elem) {
    var names = [],
        rDataAttr = /^data-/;
    $.each(elem.attributes, function(i, attr) {
        if (attr.specified && rDataAttr.test(attr.name)) {
            names.push(attr.name);
        }
    });
    return names;
}

You could then loop over the resulting array, and call removeAttr() for each item on the element.

Here’s a simple jQuery plugin that should do the trick:

$.fn.removeAttrs = function(regex) {
    return this.each(function() {
        var $this = $(this),
            names = [];
        $.each(this.attributes, function(i, attr) {
                if (attr.specified && regex.test(attr.name)) {
                        $this.removeAttr(attr.name);
                }
        });
    });
};

// remove all data-* attributes
$('#my-element').removeAttrs(/^data-/);
// remove all data-lorem* attributes
$('#my-element').removeAttrs(/^data-lorem/);

Solution 3

Vanilla JS below clears all data attributes. If you want to add some if logic to remove a subset of data attributes, it should be trivial to add that functionality to the below JavaScript.

function clearDataAttributes(el){
    if (el.hasAttributes()) {
        var attrs = el.attributes;
        var thisAttributeString = "";
        for(var i = attrs.length - 1; i >= 0; i--) {
            thisAttributeString = attrs[i].name + "-" + attrs[i].value;
            el.removeAttribute(thisAttributeString);
        }
    }
}

Comments

[stian.net]

I think you will have to use the .attr() function to loop through all the attributes and remove if name contains specific string..

[Mathias Bynens]

Note that this code is entirely untested (except the snippet from my plugin) but it should give you an idea of how to solve it. Good luck!

[UTCWebDev]

What if the attribute contains keys with additional dash separators such as data-lorem-ipsum="azbqat"? In the example above, those would not be removed.

[biziclop]

Hi, shouldn't it simply do el.removeAttribute(attrs[i].name); without using thisAttributeString?