I'm relatively new to the world of JavaScript. I create a grid in which I can select any cells. Now I would like to send all cells as binary with a Json document to the backend. For this purpose, an unselected cell should have a 0 and a selected one should have a 1. I orientate myself on Conway's Game of Life. I've been at it for 2 days now and don't know how best to implement it. Does anyone have an idea?

Here is my code to create the grid

var rows = 10;
var cols = 10;


var grid = new Array(rows);
var nextGrid = new Array(rows);


var startButton = document.getElementById('start');
startButton.addEventListener('click', event => {
    initialize()
}) 


function initializeGrids() {
    for (var i = 0; i < rows; i++) {
        grid[i] = new Array(cols);
        nextGrid[i] = new Array(cols);
        
    }
}

function copyAndResetGrid() {
    for (var i = 0; i < rows; i++) {
        for (var j = 0; j < cols; j++) {
            grid[i][j] = nextGrid[i][j];
         
        }
    }
}

// Initialize
function initialize() {
    createTable();
    initializeGrids();
}

// Lay out the board
function createTable() {
    var gridContainer = document.getElementById('gridContainer');
    if (!gridContainer) {
        // Throw error
        console.error("Problem: No div for the drid table!");
    }
    var table = document.createElement("table");
    
    for (var i = 0; i < rows; i++) {
        var tr = document.createElement("tr");
        for (var j = 0; j < cols; j++) {
            var cell = document.createElement("td");
            cell.setAttribute("id", i + "_" + j);
            cell.setAttribute("class", "dead");
            cell.onclick = cellClickHandler;
            tr.appendChild(cell);
        }
        table.appendChild(tr);
    }
    gridContainer.appendChild(table);
    }
    function cellClickHandler() {
        var rowcol = this.id.split("_");
        var row = rowcol[0];
        var col = rowcol[1];
        
        var classes = this.getAttribute("class");
        if(classes.indexOf("live") > -1) {
            this.setAttribute("class", "dead");
            grid[row][col] = 0;
        } else {
            this.setAttribute("class", "live");
            grid[row][col] = 1;
        }
        
    }