JS Throttle Debounce Functions

_throttle-debounce.js

function throttle (cb, delay) {
    let prevCall = +new Date();
    return () => {
        const time = +new Date();
        if ((time - prevCall) >= delay) {
            prevCall = time;
            cb.apply(null, arguments);
        }
    };
}

function debounce (cb, delay) {
  let tOut = null;
  return () => {
    clearTimeout(tOut);
    tOut = setTimeout(() => {
      cb.apply(this, arguments);
    }, delay);
  };
}