Simple understanding of anti shake function

  // Shake proof ： User triggered events too frequently , Only the operation of the last event is needed 
  const inp = document.querySelector("input");

  // Encapsulate an anti shake function 
  inp.oninput = debounce(function () {
    console.log(this.value);
  }, 500);
  function debounce(fn, delay) {
    let t = null;
    return function () {
      if (t !== null) {
        clearInterval(t);
      }
      t = setTimeout(() => {
        fn.call(this);
      }, delay);
    };
  }