fastest.js

let gameForm = document.getElementById('game-start-form');
let timeDuration = document.getElementById('duration');
let sCountNumber = document.getElementById("scount");
let lCountNumber = document.getElementById("lcount");
let sCountWin = document.getElementById("scountWinner");
let lCountWin = document.getElementById("lcountWinner");
let restartButton = document.getElementById("restart");
let sCount = 0;
let lCount = 0;
document.addEventListener("keydown", keyCount);
function keyCount(event)
 {
    if (timeDuration.value > 0) {
    if(event.code === "KeyL"){
        lCount++;
        lCountNumber.innerHTML = lCount;
        lCountWin.innerHTML = ""; 
        sCountWin.innerHTML = "";
    }
    if(event.code === "KeyS"){
        sCount++;
        sCountNumber.innerHTML = sCount;
        lCountWin.innerHTML = ""; 
        sCountWin.innerHTML = "";
    }
}
}

gameForm.addEventListener("click",(event)=>{
    if (timeDuration.value > 0) {    
        let secs = 0;
        
        let id = setInterval(function() { 
                secs++; 
                console.log(secs);
                if (secs >= 1){
                   if (sCount === 0 && lCount === 0){
                    sCountWin.innerHTML = "Game start please press S";
                    lCountWin.innerHTML = "Game start please press L"; 
                   }
                 }
            
                if(secs == timeDuration.value){
                    clearInterval(id);
                    if (sCount>lCount){
                       sCountWin.innerHTML = "Winner";
                       confettiS = new ConfettiGenerator({ target: 'confettiS', width: 600, height: 100 });
                       confettiS.render();
                    }
                    else if (sCount<lCount){
                        lCountWin.innerHTML = "Winner";
                        confettiL = new ConfettiGenerator({ target: 'confettiL', width: 600, height: 100 });
                        confettiL.render();
                    }
                    else{
                        sCountWin.innerHTML = "Tie";
                        lCountWin.innerHTML = "Tie";
                    }              
                
                    restartButton.disabled=false;
                    document.removeEventListener("keydown", keyCount); 
                }
                }, 1000);
                  
          }
});
restartButton.addEventListener("click", (restartTheGame) =>{
    document.location.href = "";
});