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I have a single page application written using knockout/jquery. However, I am struggling to find a better way to handle what view to show. As i need more menu items you can see how the code will be more unmanageable. I would like to be able to show a view based on what is selected and change the CSS so you can see which tab is selected too.

 <div class="col-md-2 sidebar">
 <div class="list-group">
 <a href="#" class="list-group-item list-group-item-action active" data-bind="click: ShowDashboard, css: DashboardSideBarCss">
 Dashboard
 </a>
 <a href="#" class="list-group-item list-group-item-action non-active-sidebar"
 data-bind="click: ShowCompanyDetails, css: CompanyDetailsSideBarCss">
 Company Details
 </a>
 <a href="#" class="list-group-item list-group-item-action non-active-sidebar"
 data-bind="click: ShowEmployees, css: EmployeesSideBarCss">
 Employees
 </a>
 <a href="#" class="list-group-item list-group-item-action non-active-sidebar"
 data-bind="click: ShowEtc, css: EtcCss">
 etc....
 </a>
 </div>

 </div>

use a single class/click for the view change-links and add a new attribute containing a "key" of your view, sth like:

<a href="#" data-view="dashboard" data-bind="click: changeContent">

in your changeContent function read the attribute and set it to a new observable e.g 'currentView'

sth. like:

vm.currentView($(this).attr('data-viewkey'))

(or however you are used to code)

you can then just show the correct content like:

<div style="display:none" data-bind="visible:vm.currentView()=='dashboard'" >
....

or you can toggle an 'activeclass'

data-bind="attr:class:'static_classes '+(vm.currentView()=='dashboard' ? 'active' : 'inactive' )"

or add individual dynamic selectors

 data-bind="attr:class:'content_'+vm.currentView()" 

tl;dr introduce a new observable holding a "viewkey" on which everything is based on and you can do whatever you want