How to set class of component

[irigsoft]

Hi, 

I want to use  lazysizes.min.js script from https://github.com/aFarkas/lazysizes?ref=hackernoon.com

so I add it into my custom files, but there second step, how to set this Add the class "lazyload" to your images/iframes on my components?

How to
1. Download the lazysizes.min.js script and include lazysizes in your webpage. 

2. lazysizes does not need any JS configuration: Add the class "lazyload" to your images/iframes in conjunction with a data-src and/or data-srcset attribute. Optionally you can also add a src attribute with a low quality image:

<!-- non-responsive: -->
<img data-src="image.jpg" class="lazyload" />

<!-- responsive example with automatic sizes calculation: -->
<img
    data-sizes="auto"
    data-src="image2.jpg"
    data-srcset="image1.jpg 300w,
    image2.jpg 600w,
    image3.jpg 900w" class="lazyload" />
<!-- iframe example -->

<iframe frameborder="0"
    class="lazyload"
    allowfullscreen=""
    data-src="//www.youtube.com/embed/ZfV-aYdU4uE">
</iframe>