Vertical Layouts
You can change or customize the left side navigation very easily.
How to add new menu items/change menu items?
                                        In order to add, change or remove menu items from the left side navigation, simply edit in file
                                        src/partials/sidebar.html. The change would reflect in all the html files automatically. 
                                        We are using gulp-file-include which would actually take 
                                        care of including the sidebar.html file content in all the html pages.
                                    
How to change width?
In order to change the width of left side navigation bar, open a file 
                                        src/assets/scss/_variables.scss and change the value of variable 
                                        $sidebar-width. The default value is set to 250px.
                                    
How to use pre-built layouts?
Each of the layout options is provided below with steps you would need to perform:
                                            Dark Sidebar
Add data attributedata-sidebar="dark" body element to have Dark sidebar.
                                        
                                            Small Sidebar
Keep your body element with data attributedata-sidebar-size="small" E.g.  <body data-sidebar-size="small"> to have small sidebar.
                                        
                                            Icon Sidebar
Keep your body element with classvertical-collpsed" E.g.  <body class="vertical-collpsed"> to have icon sidebar.
                                        
                                            Boxed Layout
Keep your body element with classvertical-collpsed and data attribute data-layout-size="boxed" data-keep-enlarged="true" E.g.  <body class="vertical-collpsed" data-layout-size="boxed" data-keep-enlarged="true"> to have boxed layout with icon view sidebar.
                                        
                                            Colored Sidebar
Keep your body element with data attributedata-sidebar="colored" E.g.  <body data-sidebar="colored"> to have colored Sidebar.