Simple throttled scroll event using standalone lodash throttle / debounce function

scrollEvents.js

( function( $, window, undefined ) {
	'use strict';
  
	// Cache elements
	var	$stickyTabbar 		 	= $( '.tabbar__bar' ),
		$stickyTabbarParent	  = $( '.tabbar' ),
		stickyTabbarClass		  = 'is-fixed';


	var stickyTabbarToggle = function(e) {
		console.log( 'scrollwatch' );
    
		var scroll = $(window).scrollTop();

		var offSet = $stickyTabbarParent.offset();
		var offSetTop = offSet.top;

		if ( scroll >= offSetTop ) {
			$stickyTabbar.addClass( stickyTabbarClass );
		} else {
			$stickyTabbar.removeClass( stickyTabbarClass );
		}
	}

  // Lodash throttle and debounce functions
	function debounce(t,e,n){function r(e){var n=b,r=v;return b=v=void 0,d=e,y=t.apply(r,n)}function o(t){return d=t,g=setTimeout(u,e),p?r(t):y}function i(t){var n=t-j,r=t-d,o=e-n;return O?nativeMin(o,m-r):o}function a(t){var n=t-j,r=t-d;return void 0===j||n>=e||0>n||O&&r>=m}function u(){var t=now();return a(t)?f(t):void(g=setTimeout(u,i(t)))}function f(t){return g=void 0,T&&b?r(t):(b=v=void 0,y)}function c(){void 0!==g&&clearTimeout(g),d=0,b=j=v=g=void 0}function l(){return void 0===g?y:f(now())}function s(){var t=now(),n=a(t);if(b=arguments,v=this,j=t,n){if(void 0===g)return o(j);if(O)return g=setTimeout(u,e),r(j)}return void 0===g&&(g=setTimeout(u,e)),y}var b,v,m,y,g,j,d=0,p=!1,O=!1,T=!0;if("function"!=typeof t)throw new TypeError(FUNC_ERROR_TEXT);return e=toNumber(e)||0,isObject(n)&&(p=!!n.leading,O="maxWait"in n,m=O?nativeMax(toNumber(n.maxWait)||0,e):m,T="trailing"in n?!!n.trailing:T),s.cancel=c,s.flush=l,s}
	function throttle(t,e,n){var r=!0,o=!0;if("function"!=typeof t)throw new TypeError(FUNC_ERROR_TEXT);return isObject(n)&&(r="leading"in n?!!n.leading:r,o="trailing"in n?!!n.trailing:o),debounce(t,e,{leading:r,maxWait:e,trailing:o})}function isObject(t){var e=typeof t;return!!t&&("object"==e||"function"==e)}function isObjectLike(t){return!!t&&"object"==typeof t}function isSymbol(t){return"symbol"==typeof t||isObjectLike(t)&&objectToString.call(t)==symbolTag}function toNumber(t){if("number"==typeof t)return t;if(isSymbol(t))return NAN;if(isObject(t)){var e="function"==typeof t.valueOf?t.valueOf():t;t=isObject(e)?e+"":e}if("string"!=typeof t)return 0===t?t:+t;t=t.replace(reTrim,"");var n=reIsBinary.test(t);return n||reIsOctal.test(t)?freeParseInt(t.slice(2),n?2:8):reIsBadHex.test(t)?NAN:+t}var FUNC_ERROR_TEXT="Expected a function",NAN=NaN,symbolTag="[object Symbol]",reTrim=/^\s+|\s+$/g,reIsBadHex=/^[-+]0x[0-9a-f]+$/i,reIsBinary=/^0b[01]+$/i,reIsOctal=/^0o[0-7]+$/i,freeParseInt=parseInt,freeGlobal="object"==typeof global&&global&&global.Object===Object&&global,freeSelf="object"==typeof self&&self&&self.Object===Object&&self,root=freeGlobal||freeSelf||Function("return this")(),objectProto=Object.prototype,objectToString=objectProto.toString,nativeMax=Math.max,nativeMin=Math.min,now=function(){return root.Date.now()};

	window.addEventListener( 'load', stickyTabbarToggle() );

	window.addEventListener( 'resize', stickyTabbarToggle() );

	window.addEventListener( 'scroll', throttle(stickyTabbarToggle, 50, { leading: true, trailing: true } ));

} )( jQuery, this );