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React Performance: requestAnimationFrame Example
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| // How to ensure that our animation loop ends on component unount | |
| componentDidMount() { | |
| this.startLoop(); | |
| } | |
| componentWillUnmount() { | |
| this.stopLoop(); | |
| } | |
| startLoop() { | |
| if( !this._frameId ) { | |
| this._frameId = window.requestAnimationFrame( this.loop ); | |
| } | |
| } | |
| loop() { | |
| // perform loop work here | |
| this.theoreticalComponentAnimationFunction() | |
| // Set up next iteration of the loop | |
| this.frameId = window.requestAnimationFrame( this.loop ) | |
| } | |
| stopLoop() { | |
| window.cancelAnimationFrame( this._frameId ); | |
| // Note: no need to worry if the loop has already been cancelled | |
| // cancelAnimationFrame() won't throw an error | |
| } |
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