Author: | johannschopplich |
---|---|
Views Total: | 64 views |
Official Page: | Go to website |
Last Update: | May 8, 2023 |
License: | MIT |
Preview:

Description:
unlazy is an SEO-friendly and framework-agnostic lazy loading library that displays a blurry image placeholder until the original image is completely loaded.
It works with the native loading=”lazy” attribute and uses the Intersection Observer API to detect when an image enters the viewport.
unlazy allows you to initially load low-quality blurry placeholder images and smoothly transition them to full-resolution images as they scroll into view. It supports BlurHash or ThumbHash placeholders both on the client side and server-side (during server-side rendering), which allows you to use BlurHash as a placeholder for images that have not yet loaded.
In addition, the library is easy to integrate into popular JS frameworks like React, Vue,js, Solid, etc.
How to use it:
1. Install and import the unlazy.
# Yarn $ yarn add unlazy # NPM $ npm i unlazy
import { lazyLoad } from 'unlazy' // initialize the unlazy lazyLoad()
<!-- OR --> <script src="https://unpkg.com/unlazy" defer init></script>
2. Add the blurry placeholder to the src
attribute.
<img loading="lazy" src="data:image/svg+xml, ..." >
3. Specify the path to the original image(s) using the data-srcset
attribute.
<img loading="lazy" src="data:image/svg+xml, ..." data-srcset="1x.png 1024w, 2x.png 2048w" data-sizes="auto" width="1024" height="768" >
4. It also works with the picture
tag.
<picture> <source loading="lazy" src="data:image/svg+xml, ..." data-srcset="original.jpg" media="(min-width: 800px)" > </picture>
5. Use BlurHash or ThumbHash to generate blurry placeholders.
<img data-srcset="https://source.unsplash.com/EBtfyalTU50/2400x1600" data-blurhash="LKO2:N%2Tw=w]~RBVZRi};RPxuwH" loading="lazy" data-sizes="auto" width="1024" height="768" style="aspect-ratio: 4/3" alt="Image with blurry placeholder" >
<img data-src="image.jpg" data-thumbhash="1QcSHQRnh493V4dIh4eXh1h4kJUI" >
Changelog:
v0.8.9 (05/08/2023)
- Bugfixes
v0.8.8 (04/25/2023)
- Bugfixes
v0.8.4 (04/25/2023)
- Bugfixes
- components: src an srcSet props for lazy loading
v0.8.1 (04/25/2023)
- Remove immediate option
- nuxt: lazyLoad prop for data saving mode etc.
- added Svelte component
v0.7.6 (04/24/2023)
- components: immediate prop
- bugfixes
v0.7.0 (04/22/2023)
- ThumbHash support