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Renderless component in React
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| import React from 'react'; | |
| import PropTypes from 'prop-types'; | |
| export default class MouseMovement extends React.Component { | |
| constructor(props) { | |
| super(props); | |
| this.state = { | |
| timer: undefined, | |
| }; | |
| this.timeout = this.timeout.bind(this); | |
| this.onMouseMove = this.onMouseMove.bind(this); | |
| } | |
| componentWillMount() { | |
| document.addEventListener('mousemove', this.onMouseMove); | |
| const timer = setTimeout(this.timeout, 4000); | |
| this.setState({ timer }); | |
| } | |
| componentWillUnmount() { | |
| document.removeEventListener('mousemove', this.onMouseMove); | |
| clearTimeout(this.state.timer); | |
| this.setState({ timer: undefined }); | |
| } | |
| onMouseMove() { | |
| clearTimeout(this.state.timer); | |
| const timer = setTimeout(this.timeout, 4000); | |
| this.setState({ timer }); | |
| this.props.onMoved(true); | |
| } | |
| timeout() { | |
| clearTimeout(this.state.timer); | |
| this.props.onMoved(false); | |
| } | |
| render() { | |
| return null; | |
| } | |
| } | |
| MouseMovement.propTypes = { | |
| onMoved: PropTypes.func.isRequired, | |
| }; |
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