<!DOCTYPE html>
<html style="width: 100%; height: 100%; overflow: hidden">
<head>
<meta charset="utf-8">
<title>Fiber Example</title>
</head>
<body>
<h1>Fiber Example</h1>
<div id="container">
<p>
To install React, follow the instructions on
<a href="https://github.com/facebook/react/">GitHub</a>.
</p>
<p>
If you can see this, React is <strong>not</strong> working right.
If you checked out the source from GitHub make sure to run <code>npm run build</code>.
</p>
</div>
<script src="../../build/node_modules/react/umd/react.development.js"></script>
<script src="../../build/node_modules/react-dom/umd/react-dom.development.js"></script>
<script src="https://unpkg.com/babel-standalone@6/babel.js"></script>
<script type="text/babel">
var dotStyle = {
position: 'absolute',
background: '#61dafb',
font: 'normal 15px sans-serif',
textAlign: 'center',
cursor: 'pointer',
};
var containerStyle = {
position: 'absolute',
transformOrigin: '0 0',
left: '50%',
top: '50%',
width: '10px',
height: '10px',
background: '#eee',
};
var targetSize = 25;
class Dot extends React.Component {
constructor() {
super();
this.state = { hover: false };
}
enter() {
this.setState({
hover: true
});
}
leave() {
this.setState({
hover: false
});
}
render() {
var props = this.props;
var s = props.size * 1.3;
var style = {
...dotStyle,
width: s + 'px',
height: s + 'px',
left: (props.x) + 'px',
top: (props.y) + 'px',
borderRadius: (s / 2) + 'px',
lineHeight: (s) + 'px',
background: this.state.hover ? '#ff0' : dotStyle.background
};
return (
<div style={style} onMouseEnter={() => this.enter()} onMouseLeave={() => this.leave()}>
{this.state.hover ? '*' + props.text + '*' : props.text}
</div>
);
}
}
class SierpinskiTriangle extends React.Component {
shouldComponentUpdate(nextProps) {
var o = this.props;
var n = nextProps;
return !(
o.x === n.x &&
o.y === n.y &&
o.s === n.s &&
o.children === n.children
);
}
render() {
let {x, y, s, children} = this.props;
if (s <= targetSize) {
return (
<Dot
x={x - (targetSize / 2)}
y={y - (targetSize / 2)}
size={targetSize}
text={children}
/>
);
return r;
}
var newSize = s / 2;
var slowDown = true;
if (slowDown) {
var e = performance.now() + 0.8;
while (performance.now() < e) {
}
}
s /= 2;
return [
<SierpinskiTriangle x={x} y={y - (s / 2)} s={s}>
{children}
</SierpinskiTriangle>,
<SierpinskiTriangle x={x - s} y={y + (s / 2)} s={s}>
{children}
</SierpinskiTriangle>,
<SierpinskiTriangle x={x + s} y={y + (s / 2)} s={s}>
{children}
</SierpinskiTriangle>,
];
}
}
class ExampleApplication extends React.Component {
constructor() {
super();
this.state = {
seconds: 0,
useTimeSlicing: true,
};
this.tick = this.tick.bind(this);
this.onTimeSlicingChange = this.onTimeSlicingChange.bind(this);
}
componentDidMount() {
this.intervalID = setInterval(this.tick, 1000);
}
tick() {
if (this.state.useTimeSlicing) {
ReactDOM.unstable_deferredUpdates(() => {
this.setState(state => ({ seconds: (state.seconds % 10) + 1 }));
});
} else {
this.setState(state => ({ seconds: (state.seconds % 10) + 1 }));
}
}
onTimeSlicingChange(value) {
this.setState(() => ({ useTimeSlicing: value }));
}
componentWillUnmount() {
clearInterval(this.intervalID);
}
render() {
const seconds = this.state.seconds;
const elapsed = this.props.elapsed;
const t = (elapsed / 1000) % 10;
const scale = 1 + (t > 5 ? 10 - t : t) / 10;
const transform = 'scaleX(' + (scale / 2.1) + ') scaleY(0.7) translateZ(0.1px)';
return (
<div>
<div>
<h3>Time-slicing</h3>
<p>Toggle this and observe the effect</p>
<Toggle
onLabel="On"
offLabel="Off"
onChange={this.onTimeSlicingChange}
value={this.state.useTimeSlicing}
/>
</div>
<div style={{ ...containerStyle, transform }}>
<div>
<SierpinskiTriangle x={0} y={0} s={1000}>
{this.state.seconds}
</SierpinskiTriangle>
</div>
</div>
</div>
);
}
}
class Toggle extends React.Component {
constructor(props) {
super();
this.onChange = this.onChange.bind(this);
}
onChange(event) {
this.props.onChange(event.target.value === 'on');
}
render() {
const value = this.props.value;
return (
<label onChange={this.onChange}>
<label>
{this.props.onLabel}
<input type="radio" name="value" value="on" checked={value} />
</label>
<label>
{this.props.offLabel}
<input type="radio" name="value" value="off" checked={!value} />
</label>
</label>
);
}
}
var start = new Date().getTime();
function update() {
ReactDOM.render(
<ExampleApplication elapsed={new Date().getTime() - start} />,
document.getElementById('container')
);
requestAnimationFrame(update);
}
requestAnimationFrame(update);
</script>
</body>
</html>