script.js

AOS.init({
    delay: 200, 
    duration: 1500, 
    once: false, 
    mirror: false, 
})

const counters = document.querySelectorAll('.counter');
const speed = 200; // The lower the slower

counters.forEach(counter => {
  const updateCount = () => {
    const target = +counter.getAttribute('data-target');
    const count = +counter.innerText;

    // Lower inc to slow and higher to slow
    const inc = target / speed;

    // console.log(inc);
    // console.log(count);

    // Check if target is reached
    if (count < target) {
      // Add inc to count and output in counter
      counter.innerText = count + inc;
      // Call function every ms
      setTimeout(updateCount, 1);
    } else {
      counter.innerText = target;
    }
  };

  updateCount();
});