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Facebook Relay continuous scrolling example
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class PostIndex extends React.Component { | |
state = { loading: false }; | |
componentDidMount() { | |
window.onscroll = () => { | |
if (!this.state.loading | |
&& (window.innerHeight + window.scrollY) | |
>= document.body.offsetHeight) { | |
this.setState({loading: true}, () => { | |
this.props.relay.setVariables({ | |
count: this.props.relay.variables.count + 5 | |
}, (readyState) => { // this gets called twice https://goo.gl/ZsQ3Dy | |
if (readyState.done) { | |
this.setState({loading: false}); | |
} | |
}); | |
}); | |
} | |
}.bind(this); | |
} | |
render() { | |
return ( | |
<div> | |
<Header /> | |
<div className={styles.postList}> | |
{this.props.query.posts.edges.map(edge => | |
<PostPreview key={edge.node.id} post={edge.node} /> | |
)} | |
{this.state.loading && <h1 className={styles.loading}>Loading...</h1>} | |
</div> | |
</div> | |
); | |
} | |
} | |
export default Relay.createContainer(PostIndex, { | |
initialVariables: {count: 15}, | |
fragments: { | |
query: () => Relay.QL` | |
fragment on Session { | |
posts(first: $count) { | |
edges { | |
node { | |
id | |
${PostPreview.getFragment('post')} | |
} | |
} | |
} | |
} | |
`, | |
}, | |
}); |
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