| license: mit |
React Motion's interpolated styles are just arbitrary values and don't have to map to actual CSS styles.
In this example, only a single value t is interpolated by React Motion from 0 to 1 when the mouse is pressed, and passed to an color interpolator created with d3-interpolate. Additionally, it's used to scale the text and to display a percentage.
| <!DOCTYPE html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <style> | |
| body { | |
| margin:0; | |
| font-family: Helvetica, sans-serif; | |
| font-size: 3em; | |
| } | |
| div { | |
| width: 100vw; | |
| height: 100vh; | |
| display: flex; | |
| align-items: center; | |
| justify-content: center; | |
| text-align: center; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div id="app" /> | |
| <script src="https://unpkg.com/[email protected]/babel.min.js"></script> | |
| <script src="https://unpkg.com/[email protected]/dist/react.js"></script> | |
| <script src="https://unpkg.com/[email protected]/dist/react-dom.js"></script> | |
| <script src="https://unpkg.com/[email protected]/build/react-motion.js"></script> | |
| <script src="https://unpkg.com/[email protected]"></script> | |
| <script type="text/babel"> | |
| const {Motion, spring, presets} = ReactMotion; | |
| // Super-slow spring | |
| const springConfig = {stiffness: 50, damping: 20}; | |
| const formatPercent = d3.format('.0%'); | |
| class Color extends React.Component { | |
| constructor() { | |
| super(); | |
| this.state = {down: false}; | |
| this.onPress = () => this.setState({down: true}); | |
| this.onRelease = () => this.setState({down: false}); | |
| } | |
| render() { | |
| const interpolateColor = d3.interpolateHclLong(this.props.from, this.props.to); | |
| return ( | |
| <Motion | |
| defaultStyle={{t: 0}} | |
| style={{t: spring(this.state.down ? 1 : 0, springConfig)}} | |
| > | |
| {({t}) => ( | |
| <div | |
| onMouseDown={this.onPress} | |
| onMouseUp={this.onRelease} | |
| onTouchStart={this.onPress} | |
| onTouchEnd={this.onRelease} | |
| style={{background: interpolateColor(t)}} | |
| > | |
| <span | |
| style={{transform: `scale(${1-t * 0.5})`}} | |
| > | |
| Press me<br />{formatPercent(t)} | |
| </span> | |
| </div> | |
| )} | |
| </Motion> | |
| ); | |
| } | |
| } | |
| ReactDOM.render( | |
| <Color from='#ffde28' to='#c85bff' />, | |
| document.getElementById('app') | |
| ); | |
| </script> | |
| </body> |
