Adding Instagram filters on images in my website

Question

I am using CSSGram on my website to make images have Instagram-like filters. This is the method below to add a filter to a image:

Answer 1

with JQUERY:

use addClass method

$('figure').addClass('aden')

see this fiddle

or you can use just javascript:

var a = document.querySelector('figure');
if (a.classList) {
    a.classList.add('aden');
} else {
    a.className += ' aden';
}

see this fiddle