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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<title>preview</title>
<style>
html,
body {
margin: 0;
padding: 0;
}
.head {
height: 100px;
}
.list {
overflow-x: hidden;
overflow-y: scroll;
-webkit-overflow-scrolling: touch;
height: 600px;
}
[style*="--aspect-ratio"] {
position: relative;
}
[style*="--aspect-ratio"]::before {
content: "";
display: block;
padding-bottom: calc(100% / (var(--aspect-ratio)));
}
[style*="--aspect-ratio"]> :first-child {
position: absolute;
top: 0;
left: 0;
height: 100%;
}
</style>
</head>
<body>
<div id="app"></div>
<script src="https://unpkg.com/[email protected]/babel.min.js"></script>
<script type="text/javascript" src="https://unpkg.com/[email protected]/umd/react.development.js"></script>
<script type="text/javascript" src="https://unpkg.com/[email protected]/umd/react-dom.development.js"></script>
<script src="./dist/react-virtual-scroller.umd.js"></script>
<script type="text/babel">
const Viewport = VirtualScroller.Viewport;
const VirtualScrollerComponent = VirtualScroller.default;
function getData(num, from = 0) {
return new Array(num).fill(1).map((_, index) => ({
id: from + index,
height: Math.random() * 200 + 50,
}));
}
class App extends React.Component {
state = {
wrapperNode: null,
datas: getData(100),
};
constructor(props) {
super(props);
this.receiveRef = this.receiveRef.bind(this);
}
renderItem = (item) => (
<div
style={{ height: item.height }}
className="item"
style={{ '--aspect-ratio': 300 / item.height }}
>
<div>
{item.id}
</div>
</div>
);
receiveRef(ref) {
this.setState({ wrapperNode: ref });
}
getViewport() {
const {
wrapperNode
} = this.state;
if (!this._viewport) {
this._viewport = new Viewport(window, wrapperNode);
}
this._viewport.setOffsetTop(100);
return this._viewport;
}
render() {
const {
wrapperNode
} = this.state;
return (
<div>
<div className="list" ref={this.receiveRef}>
<div className="head">head</div>
{
wrapperNode ? (
<VirtualScrollerComponent
ref={ref => window.vscroll = ref}
items={this.state.datas}
renderItem={this.renderItem}
viewport={this.getViewport()}
/>
) : null
}
</div>
</div>
);
}
}
ReactDOM.render(
<App />,
document.getElementById('app')
);
</script>
</body>
</html>