@substrate-system/blur-hash
v0.0.2
Published
A blurry placeholder image web component
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Readme
blur hash
This is the "blur-up" image loading technique, with the blur-hash algorithm, as a web component.
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install
npm i -S @substrate-system/blur-hash
API
This exposes ESM and common JS via package.json exports
field.
ESM
import '@substrate-system/blur-hash'
Common JS
require('@substrate-system/blur-hash')
attributes
Takes the following attributes
time
The time for css transitions and animation. This is set as a CSS variable.
placeholder
The string created by the blurhash algorithm. See node example.
width & height
The dimensions for the image
CSS
Import CSS
import '@substrate-system/blur-hash/css'
Or minified:
import '@substrate-system/blur-hash/css/min'
variables
CSS variables
--blur-hash-time
-- the transition time for animating blurry -> sharp, default is0.8s
--blur-hash-opactiy
-- the opacity to use for the placeholder image, default is0.6
use
This calls the global function customElements.define
. Just import, then use
the tag in your HTML.
Bundler
JS
import '@substrate-system/blur-hash'
HTML
<div>
<blur-hash
time="0.6s"
placeholder="LEHV6nWB2yk8pyo0adR*.7kCMdnj"
src="..."
width=100
height=100
>
</blur-hash>
</div>
pre-built JS
This package exposes minified JS files too. Copy them to a location that is accessible to your web server, then link to them in HTML.
copy
cp ./node_modules/@substrate-system/blur-hash/dist/blur-hash.min.js ./public
HTML
<script type="module" src="./blur-hash.min.js"></script>
Create the string
This package includes a CLI tool to create the placeholder string. After installing this as a dependency,
npx blur ./my-file.jpg
Will print a string to stdout that can be used as a placeholder attribute.
Print to system clipboard
On mac os,
npx blur ./my-file.jpg | pbcopy