throttling.js

//takes the function to be throttled and time delay in between subsequent fires as parameters. 
//returns the passed function wrapped with settimeout and pass check. Takes latest arguments in subsequent calls.
 let throttle=(fn,timedelay)=>{
        let ref={pass:true,arguments:[]};
        return function(){
            ref.arguments=arguments;
            if(ref.pass){
                setTimeout(()=>{
                    fn.apply(this,ref.arguments);
                    ref.pass=true;
                },timedelay);

               ref.pass=false;
            }
        }
    }