...Images outside of viewport will not be loaded before user scrolls to them. This is opposite of image preloading. This is a modern vanilla JavaScript version of the original Lazy Load plugin. It uses Intersection Observer API to observe when the image enters the browsers viewport. Original code was inspired by YUI ImageLoader utility by Matt Mlinac. New version loans heavily from a blog post by Dean Hume. By default Lazy Load assumes the URL of the original high resolution image can be found in data-src attribute. You can also include an optional low resolution placeholder in the src attribute. ...