Script.js

let boxes=document.querySelectorAll(".box")
let resetBtn=document.querySelector("#btn")
let newButton=document.querySelector("#new-button")
let msgContainer=document.querySelector("#msg")
let msg=document.querySelector(".msg-container")

let turnO=true;

const winPattern=[
    [0,1,2],
    [0,3,6],
    [0,4,8],
    [1,4,7],
    [2,5,8],
    [2,4,6],
    [3,4,5],
    [6,7,8]
];

boxes.forEach((box) => {
    box.addEventListener("click",()=>{
        console.log("box was clicked");
        if(turnO){
            box.innerText="O";
            turnO=false;
        }else{
            box.innerText="X";
            turnO=true;
        }
        box.disabled=true;
        checkWinner();
    });
});

const disableBoxes=()=>{
    for(let box of boxes){
        box.disabled=true;

    }
}
const resetGame=()=>{
    turnO=true;
    enableBoxes();
    msgContainer.classList.add("hide");

}
const enableBoxes=()=>{
    for(let box of boxes){
        box.disabled=false;
        box.innerText="";
    }
}
const showWinner= (winner)=>{
    msg.innerText=`congratulations, Winner is ${winner}`;
    msgContainer.classList.remove("hide");
    disableBoxes();
};
const checkWinner=()=>{
    for(pattern of winPattern){
        let pos1Val=boxes[pattern[0]].innerText;
        let pos2Val=boxes[pattern[1]].innerText;
        let pos3Val=boxes[pattern[2]].innerText;

        if(pos1Val!="" && pos2Val!="" && pos3Val!=""){
            if(pos1Val===pos2Val && pos2Val===pos3Val){
                console.log("winner");
                showWinner(pos1Val);
            }
        }
    }
};
newButton.addEventListener("click",resetGame);
resetBtn.addEventListener("click",resetGame);