30-seconds-of-code/snippets/debounce.md

debounce

Creates a debounced function that delays invoking the provided function until after wait milliseconds have elapsed since the last time the debounced function was invoked.

Use setTimeout() and clearTimeout() to debounce the given method, fn. Use Function.apply() to apply the this context to the function and provide the necessary arguments. Omit the second argument, wait, to set the timeout at a default of 0 ms.

const debounce = (fn, wait = 0) => {
  let inDebounce;
  return function() {
    const context = this,
      args = arguments;
    clearTimeout(inDebounce);
    inDebounce = setTimeout(() => fn.apply(context, args), wait);
  };
};

window.addEventListener(
  'resize',
  debounce(function(evt) {
    console.log(window.innerWidth);
    console.log(window.innerHeight);
  }, 250)
); // Will log the window dimensions at most every 250ms