After integrating HTML into JavaScript by React.js, a logical next step is to do the same for CSS.
Build with help of the awesome recast library.
var IntegratedStyle = require('IntegratedStyle');
var vars = require('./vars');
var mixins = require('./mixins');
var Button = React.createClass({
normal: IntegratedStyle(function() {
return Object.assign({
backgroundColor: vars.black
}, mixins.transparent);
}),
hover: IntegratedStyle(function() {
return {
backgroundColor: 'white'
};
}),
getInitialState: function() {
return {
hover: false
};
},
render: function() {
var style = this.state.hover ? this.normalStyle() : this.hoverStyle();
return <div style={style}>Example</div>;
},
onMouseOver: function() {
this.setState({hover: true});
}
});
Turns into:
css
---
.a {
background-color: 'black';
opacity: 0.1;
}
.b {
background-color: 'white';
}
js
--
var Button = React.createClass({
normal: function() {
return "a";
},
hover: function() {
return "b";
},
getInitialState: function() {
return {
hover: false
};
},
render: function() {
var style = this.state.hover ? this.normalStyle() : this.hoverStyle();
return <div style={style}>Example</div>;
},
onMouseOver: function() {
this.setState({hover: true});
}
});
CSS is problematic to maintain and components give all the borders you actually need.
- It takes out the
cssfunction and transform it into plain CSS - The
cssfunction is executed on its own, it has no reference to 'this' - connect the (something.)css().something blocks to CSS
- create CSS with annoyingly small CSS className selectors (3 characters max - up to 140608 classes)
- CSS is coupled to the component and can be passed to another component via
props (
aProp={this.css().something}) - isn't smart about actual references to the CSS function
integrated-css --input=example/**/*.js --output=build/ --css=build/styling/lala.css
Biggest difference here is that IntegratedStyle is a CSS + JS preprocessor solution instead of a runtime solution.
Also there is (from the React.js team):
- [Inline Style Extension](https://github.com/reactjs/react-future/blob/master/04 - Layout/Inline Style Extension.md)
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