The disable buttons of RadToolbar do not appear as disabled under in IE7, IE8, and Chrome.

A placeholder feedback item for responsive toolbar based on customer feedback:

* Adaptive (width-wise) toolbar sort of like Kendo's
* Allow hiding text / hiding items on smaller devices

The issue can be reproduced in Chrome, Edge, FireFox.

Steps to replicate: In the browser, navigate to the RadToolBarButton and press enter. (click is not performed and events are not fired)

<script>    
    function buttonClicked(sender, args) {
        debugger;
    }
    function buttonClicking(sender, args) {
        debugger;
    }
</script>
<telerik:RadToolBar ID="RadToolBar1" runat="server" OnClientButtonClicked="buttonClicked" OnClientButtonClicking="buttonClicking">
    <Items>
        <telerik:RadToolBarButton Text="Button"></telerik:RadToolBarButton>
    </Items>
</telerik:RadToolBar>

 <telerik:RadToolBar ID="toolbarRibbon" runat="server" Orientation="Horizontal" Width="100%" RenderMode="Lightweight"

           OnClientButtonClicking="OnClientButtonClicking"
          OnClientButtonClicked="OnClientButtonClicked">
        <Items>
            <telerik:RadToolBarButton ID="toolBtnAnalyses" runat="server"
                Text="Analyses"
                Visible="true" Target="_blank"
                NavigateUrl="About.aspx" 
                ImagePosition="AboveText" CheckOnClick="true" ImageUrl="Content/chart.png" />
              <telerik:RadToolBarButton ID="RadToolBarButton1" runat="server"
                Text="Analyses"
                Visible="true" 
                NavigateUrl="About.aspx" 
                ImagePosition="AboveText" CheckOnClick="true" ImageUrl="Content/chart.png" />
        </Items>
    </telerik:RadToolBar>

There is a workaround if the button's ImagePosition is set to "Left" or "Right":

.rtbImage {
    pointer-events: none;
}

Replicated only when Orientation=Vertical. The problem seems to be the _responsiveCheck function of Toolbar\Views\LiteView.js called from the _repaint method of the same file.

screencast: https://www.screencast.com/t/SF5b1KZR7pIp

screenshot before/after https://www.screencast.com/t/KG645ZgX

Workaround: calling toolbar.get_view()._showAllHiddenItems(); after adding programmatically the buttons.

In order to prevent clicking on the same button twice, when server-side click button is handled, the RadToolBar should be disabled or the clicked button. For that reason we are going to expose the following property:
SingleClick = None/Button/ToolBar.

In case that you want SingleClick property on RadToolBarButton, please leave us a comment with your feedback.