knowledge/Lazy loading images in HTML.md

Lazy loading images in HTML

To implement Lazy Loading to an <img ... > tag, add the attrbitue loading=lazy

<img loading=lazy ... >

This will load the image when scrolling is near the viewport, using the Intersection Observer API

Further reading

• https://web.dev/native-lazy-loading

What led to learning this

• Accidentally: a rabbit hole that started at Jason Crawford's github and ended at https://github.com/owid/owid-grapher/pull/422