React Performance: Timeout Management Example

timeouts.js

// How to propery cancel timeouts/intervals

compnentDidMount() {
 this._timeoutId = setTimeout( this.doFutureStuff, 1000 );
 this._intervalId = setInterval( this.doStuffRepeatedly, 5000 );
}
componentWillUnmount() {
 /*
    ProTip: If the operation already completed, or the value is undefinded
    these functions don't give a damn
 */
 clearTimeout( this._timeoutId );
 clearInterval( this._intervalId );
}