knowledge/img lazy loading in html.md

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2020-07-27 23:25:24 +02:00
# img lazy loading 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](https://developers.google.com/web/updates/2016/04/intersectionobserver)
## Further reading
- <https://web.dev/native-lazy-loading>
## Why learned this
- Accidentally: a rabbit hole that started at [Jason Crawford's github](https://github.com/jasoncrawford) and ended at <https://github.com/owid/owid-grapher/pull/422>