Script to track the number of certain tags on a page?

Question

JavaScript

Suppose there is a tag aside, you need to track their number and display this number on the page

Answer 1

Well, for example, in the forehead you can:

const resultDiv = document.createElement('div')
document.body.appendChild(resultDiv);

setInterval(() => {
  const count = document.querySelectorAll('div').length;
    resultDiv.innerText = count;
  
}, 500)