Mugiwara
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Mugiwara is a fast minimal CSS-in-JS created to reduce size of CSS injected
Mugiwara uses similar Virtual CSS concept to reduce bundle however using a preemption algorithm behind, called as Chain CSS. On 1.2KB (gzipped).
Status: Under development.
Benchmark
cxs x 31,955 ops/sec Âą5.10% (85 runs sampled)
fela x 29,790 ops/sec Âą0.93% (85 runs sampled)
mugiwara x 33,806 ops/sec Âą0.96% (86 runs sampled)
glamor x 25,009 ops/sec Âą1.34% (85 runs sampled)
Fastest is mugiwara
âĻ Done in 27.38s.Principles:
- Transform declarations in Shallow way
Browsers read selectors from right to left. The deeper the selectors are, the longer it takes for the browser to render and re-render the elements those selectors are applied to. For complex DOMs that reflow often, short selectors can also cut down on jank.
Good to read: Efficiently Rendering CSS
- Prehemption
Feature not available yet, soon more details.
- Remove redundances
Good to read: Remove Unused CSS to Reduce the Size of your Stylesheets
How Chain CSS works?
Algorithm still in development, here's a preview of first step:
Element A -> {color: 'blue', padding: '10px', fontFamily: 'Helvetica'}
Element B -> {color: 'red', borderRight: '1px solid #333'}
Element C -> {padding: 10, fontFamily: 'Helvetica'}
Result:
.A {
color: blue
}
.A, .C {
padding: '10px',
fontFamily: 'Helvetica'
}
.B {
border-right: '1px solid #333'
}Installing
yarn add mugiwaraUsing it
Example with ReactJS:
import React from 'react'
import { render } from 'react-dom'
import { createClass, createStyles } from 'mugiwara'
const className = createClass({
padding: 32,
backgroundColor: 'green'
})
const Box = (props) => <div {...props} className={className} />
createStyles()
render(Box, document.querySelector('#root'))Also valid API (still in draft):
const className = createClass(`
position: 'abolute',
padding: 32px,
backgroundColor: 'green'
& div {
width: 100px;
}
`)Example with ReactJS Server side-render:
import React from 'react'
import ReactDOMServer from 'react-dom/server'
import { shallowStyles } from 'mugiwara'
import App from './App'
const renderedApp = ReactDOMServer.renderToString(<App />)
const staticPage = `
<html>
<style>${shallowStyles()}</style>
${renderedApp}
</html>
`
console.log(staticPage)
/*
<html>
<style>.app{position:absolute;display:flex;margin:0 auto;}.heading{font-family:Helvetica, arial;}</style>
<div class="app" data-reactroot=""><div class="heading">MyApp</div></div>
</html>
*/1.x ROADMAP
- Support pseudo-selectors
- Support to prefix
- Check similar properties (e.g:
#FFF,white) and keep one - Support MediaQueries
- Support Server Side Renderer
- Cache features
- Support React Native Style (using native-css)