debounce.js

var myFun = debounce(() => console.log('call'), 1000);

myFun();
myFun();
myFun(); //only this call will be called


function debounce(fn, delay) {
  let isActivated = false;
  return function() {
    if (!isActivated) {
    isActivated = true;
    setTimeout(() => {
      fn();
      isActivated = false;
      }, delay);
    }
  }
}