Javascript check if dynamically created buttons are clicked multiple times

I created a loop with buttons in it. I also created an eventListener that keeps a count for every button. I want something to happen when all buttons have been presses at least 3 times, so I created an if statement that checks if the count is 3 and adds 1 to another count, but the other count stays on 1 even if multiple buttons have been pressed 3 times.

for (let i = 0; i < 7; i++) {
  let btn = document.createElement('button');

  btn.classList.add('buttons');
  btn.id = 'button' + i;

  document.getElementById('box').appendChild(btn);

  let count = 0;
  let count2 = 0;

  btn.addEventListener('click', () => {
    count++;
    console.log(count);

    if (count === 3) {
      console.log('3');

      count2++;
      console.log(count2);
    } else {

      console.log('not 3');
    }
  });
}

#box button { min-width: 20px; min-height: 20px; }
.as-console-wrapper { max-height: 87%!important; }
body { margin: 0; }

<div class="box" id="box">
</div>

So the count variable works fine, and when 1 button has been clicked 3 times the count2 variable changes to 1, but it stays on 1 and I can’t seem to find out why. At the end count2 should be 7, because there are 7 buttons.

>Solution :

as Vladimir implied in the comments its a scoping problem.

The variable count is only declared inside the event listener, so later on when you press different button your code does count++ for a different count variable.

To solve this declare var count instead of let count – that will make it global.

Or declare the count variable before the for loop.

BTW: make sure to stop updating count as it gets to 3, since it wouldn’t update count2 if it gets to 4 or above