/* Manage viewport behavior */

+function ($, viewport) {
	'use strict';


		window.BpUtils= {

			// add a callback to call on every breakpoint switch
			// callback is call this viewport as argument
			// more about viewport : https://github.com/maciej-gurban/responsive-bootstrap-toolkit
			newBreakpointRulesList: [],
			addCallBack: function(rule) {
				this.newBreakpointRulesList.push(rule);
			},
			applyNewBreakpointRules: function (viewport) {
				if(this.newBreakpointRulesList.length == 0) { return; }
				$.each(this.newBreakpointRulesList, function(i, rule){
					rule(viewport);
				});
			},

			// Listen viewport changes
			currentbp: '',
			onUpdateViewport: function() {
				var
					bp = viewport.current()
				;
				if (bp.length != 2) { // if breakpoint not detected yet
					setTimeout(window.BpUtils.onUpdateViewport, 20);
					return;
				}
				//
				if (bp != this.currentbp) {
					this.currentbp = bp;
					window.BpUtils.applyNewBreakpointRules(viewport);
				}
			}
		};

		// on resize
		$(window).resize(
			viewport.changed(function() {
				window.BpUtils.onUpdateViewport();
			})
		);
		window.BpUtils.onUpdateViewport();

}(jQuery, ResponsiveBootstrapToolkit);

ResponsiveBootstrapToolkit : https://github.com/maciej-gurban/responsive-bootstrap-toolkit

Bootstrap javascript breakpoint utils

javascript

JavaScript