ZatsuneNoMokou

/**
 * Debounce creates a FUNCTION that when invoked, delays invoking fn for wait milliseconds since
 * the last time it is called.
 *
 * @param {number} fn - function to call
 * @param {number} wait - duration in milliseconds
 * @param {number} maxWait - max duration in milliseconds before calling {@param fn}
 * @retun {function} a function that will wait {@param wait} milliseconds since it's last called to invoke {@param fn}.
 */
function debounce(fn, wait, maxWait=null) {