debounce-throttle.js

/*! Author: Timo Tijhof (2019) | License: Public domain. */

/**
 * Wrap the function and debounce calls to it for a specified duration.
 *
 * @param {Number} delay
 * @param {Function} callback
 * @return {Function}
 */
function debounce( delay, callback ) {
	var timeout;
	return function debounced() {
		clearTimeout( timeout );
		timeout = setTimeout( Function.prototype.apply.bind( callback, this, arguments ), delay );
	};
}

/**
 * Make the function async and ignore successive calls until it's finished.
 *
 * @param {Function} callback
 * @return {Function}
 */
function throttle( callback ) {
	var pending, ctx, args;
	return function() {
		ctx = this, args = arguments; // last call before timeout should win
		if ( !pending ) {
			pending = setTimeout( function () {
				pending = null;
				callback.apply( ctx, args );
			} );
		}
	};
}

$ php maintenance/minify.php debounce.js 
debounce.js -> debounce.min.js... ok
$ wc -c debounce.min.js 
180 bytes  debounce.min.js
$ cat debounce.min.js  | gzip -9 | wc -c
141 bytes

$ curl 'https://en.wikipedia.org/w/load.php?modules=ext.popups.main' > popups.min.js
$ wc -c popups.min.js 
57076 bytes  popups.min.js
$ cat popups.min.js | gzip -9 | wc -c
15996 bytes

$ cat debounce.min.js popups.min.js | gzip -9 | wc -c
16060

$ curl https://en.wikipedia.org/w/load.php?modules=jquery.throttle-debounce > jqthrotbounce.min.js
$ cat jqthrotbounce.min.js popups.min.js | gzip -9 | wc -c
16476

Net costs for module responses:

• debounce: 64 bytes (16060 - 15996)
• jquery.throttle-debounce: 480 bytes (16476 - 15996)