Run function on interval till it returns true

RunTillTrue.js

class RunTillTrue{
	constructor( s, func = null ){
		this.sec	= s;
		this.thread = null;
		this.task 	= func;
		this.active	= false;
		
		this.run 	= ()=>{ 
			if( !this.active || this.task() == true ) this.stop();
		};
	}
	
	stop(){ 
		this.active = false; 
		clearInterval( this.thread ); 
		this.thread = null;
	}
	
	start(){
		if( !this.thread ) clearInterval( this.thread );
		this.active = true;
		this.thread = setInterval( this.run, this.sec );	
	}
}