Storing the actual image URL in a "data" attribute (e.g., data-src or your data-lazy-fallback ).
A script then swaps the placeholder for the real image once it enters the user's view. Why You See This in Code
: Only essential "above-the-fold" content loads immediately. <img data-lazy-fallback="1" src="//alltorrents....
: Most modern browsers support a simple loading="lazy" attribute directly in the tag.
Using a placeholder image in the src attribute (like a tiny 1px transparent GIF). Storing the actual image URL in a "data" attribute (e
In modern web development, there are two main ways to implement this:
If you are seeing data-lazy-fallback="1" , it typically means the website is using a specific plugin or script (like or LazySizes ) to handle image loading. The "1" often acts as a toggle or "true" value to tell the script that this specific image should have a fallback mechanism applied if the primary loading method fails or isn't supported. : Most modern browsers support a simple loading="lazy"
I have a problem with img-src and lazy loading - WordPress.org
