Analysis of checking a draw in the tic-tac-toe game in JavaScript
Let's now consider a draw. Obviously, a draw occurs if all cells are filled and there is no winner. Let's do it:
function start(cells) {
let i = 0;
for (let cell of cells) {
cell.addEventListener('click', function step() {
this.textContent = ['X', 'O'][i % 2];
this.removeEventListener('click', step);
if (isVictory(cells)) {
alert(this.textContent);
} else if (i == 8) {
alert('draw');
}
i++;
});
}
}