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React Performance: requestAnimationFrame Example
// 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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