Question: Please help me for How to convert data from {"rOjbectId":["abc","def",ghi","ghikk"]} to "["abc", "def", "ghi", "ghikk"] using ajax

Answer: 
I found a good solution on GitHub. Just use the **CSS** code below:

```css
img[src=""],
img:not([src]) {
  visibility: hidden;
}

```

Link: <https://github.com/wp-media/rocket-lazy-load/issues/60>
you can use placeholder image, which is very light weight and use that in place of each image.

same time while loading page, you can load all the images in hidden div. 
then on document ready you can replace all the images with jQuery. 

e.g. 

HTML
----

```
<img src="tiny_placeholder_image" alt="" data-src="original_image_src"/>
<!-- upto N images -->

<!-- images are loading in background --> 
<div style="display:none">
   <img src="original_image_src" alt=""/>
   <!-- upto N images -->
</div>

```

JavaScript
----------

```
(function($){
    // Now replace all data-src with src in images. 
})(jQuery);

```