how to make a looping setinterval stop code example

Example 1: Javascript stop setInterval

var myInterval = setInterval(function(){console.log("mmk")}, 2000);

clearInterval(myInterval); //stop that interval

Example 2: javascript stop setinterval

let autoScroll = window.setInterval(() => {
  if (window.scrollY >= document.getElementById('second-part').scrollHeight) {

    clearInterval(autoScroll);
  }

  window.scrollBy(0, 10);
}, 25);