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WindowResizeListener
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| class ResizeListener extends React.Component { | |
| state = {} | |
| getWindowSize() { | |
| return { | |
| innerWidth: window.innerWidth, | |
| innerHeight: window.innerHeight, | |
| }; | |
| } | |
| changeState = () => { | |
| const newSize = this.getWindowSize(); | |
| this.setState(newSize); | |
| this.props.onChange(newSize); | |
| } | |
| componentDidMount() { | |
| this.changeState(); | |
| window.addEventListener('resize', this.changeState, true); | |
| } | |
| componentWillUnmount() { | |
| window.removeEventListener('resize', this.changeState, true); | |
| } | |
| render() { | |
| return <span data-innerwidth={this.state.innerWidht} data-innerheight={this.state.innerHeight}/>; | |
| } | |
| } | |
| class MyComponent extends React.Component { | |
| state = {} | |
| handleWindowChange = (size) => { | |
| this.setState(size); | |
| } | |
| render() { | |
| return ( | |
| <div> | |
| <ResizeListener onChange={this.handleWindowChange}/> | |
| <h1>windowSize: {this.state.innerWidth} x {this.state.innerHeight}</h1> | |
| </div> | |
| ); | |
| } | |
| } | |
| ReactDOM.render( | |
| <MyComponent/>, | |
| document.getElementById('container') | |
| ); |
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| const withWindowSize = (WrappedComponent) => { | |
| class ResizeListener extends React.Component { | |
| state = {} | |
| getWindowSize() { | |
| return { | |
| innerWidth: window.innerWidth, | |
| innerHeight: window.innerHeight, | |
| }; | |
| } | |
| changeState = () => { | |
| this.setState(this.getWindowSize()); | |
| } | |
| componentDidMount() { | |
| this.changeState(); | |
| window.addEventListener('resize', this.changeState, true); | |
| } | |
| componentWillUnmount() { | |
| window.removeEventListener('resize', this.changeState, true); | |
| } | |
| render() { | |
| return <WrappedComponent {...this.props} {...this.state} />; | |
| } | |
| } | |
| return ResizeListener; | |
| } | |
| const myComponent = ({a}) => { | |
| return <h1>windowSize: {innerWidth} x {innerHeight}</h1> | |
| } | |
| const MyWrappedComponent = withWindowSize(myComponent); | |
| ReactDOM.render( | |
| <MyWrappedComponent/>, | |
| document.getElementById('container') | |
| ); |
One option: use https://github.com/ctrlplusb/react-sizeme on the container and inject its width/height to the component that renders the canvas (idea from https://github.com/alampros/react-confetti)
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Really depends on the usecase.