dswitzer

/*
 * fireThenDebounce(delay, immediate, tail)
 *
 * delay       - number of milliseconds in which to debounce the `trail` callback
 * immediate   - function to run when the debounce handler starts
 * tail        - the debounced function to run after the inactive delay is reached
 *
 * This is a special version of a debounce handler, which allows you to trigger
 * off code to run at the start and end of a debounced event. A normal debounce
 * event only fires when a debounced event ends.