There is a bug with combining scripts and resources:
Combined CDN Request for Telerik Controls
You can reproduce the issue in the attached web site sample.
<telerik:RadScriptManager ID="RadScriptManager1" runat="server">
<CdnSettings TelerikCdn="Enabled" CombinedResource="Enabled"></CdnSettings>
<Scripts>
<telerik:RadScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.Core.js" />
<telerik:RadScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.jQuery.js" />
<telerik:RadScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.jQueryInclude.js" />
</Scripts>
</telerik:RadScriptManager>
<script>
function pageLoad() {
var grid = $find("<%=RadGrid1.ClientID%>");
alert(grid._showFilterMenu);
}
</script>
<telerik:RadGrid ID="RadGrid1" runat="server" AllowPaging="True" Width="800px" OnNeedDataSource="RadGrid1_NeedDataSource">
<MasterTableView AutoGenerateColumns="False" DataKeyNames="OrderID">
<Columns>
<telerik:GridBoundColumn DataField="OrderID" DataType="System.Int32"
FilterControlAltText="Filter OrderID column" HeaderText="OrderID"
ReadOnly="True" SortExpression="OrderID" UniqueName="OrderID">
</telerik:GridBoundColumn>
<telerik:GridDateTimeColumn DataField="OrderDate" DataType="System.DateTime"
FilterControlAltText="Filter OrderDate column" HeaderText="OrderDate"
SortExpression="OrderDate" UniqueName="OrderDate">
</telerik:GridDateTimeColumn>
<telerik:GridNumericColumn DataField="Freight" DataType="System.Decimal"
FilterControlAltText="Filter Freight column" HeaderText="Freight"
SortExpression="Freight" UniqueName="Freight">
</telerik:GridNumericColumn>
<telerik:GridBoundColumn DataField="ShipName"
FilterControlAltText="Filter ShipName column" HeaderText="ShipName"
SortExpression="ShipName" UniqueName="ShipName">
</telerik:GridBoundColumn>
<telerik:GridBoundColumn DataField="ShipCountry"
FilterControlAltText="Filter ShipCountry column" HeaderText="ShipCountry"
SortExpression="ShipCountry" UniqueName="ShipCountry">
</telerik:GridBoundColumn>
</Columns>
</MasterTableView>
</telerik:RadGrid>When you pull in BootStrap there are additional attributes such as 'crossorigin="anonymous" and integrity="...." ' How can these be added to Script Manager and CSS manager? Likewise, there would a separation between bootstraps layout and the skin that Telerik an provide. This gives the advantage of it being BootStrap compliant, but with all the skins that Telerik offer, making re-skinning easier. This is one of the biggest bug bares of designing a site with Telerik, is the post-production work on CSS by a third party, as its not 'standards compliant' by which they mean its not like a normal Bootstrap site that they are familiar with. Thanks Doug <link rel="stylesheet" href=https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css integrity="sha384-1q8mTJOASx8j1Au+a5WDVnPi2lkFfwwEAa8hDDdjZlpLegxhjVME1fgjWPGmkzs7" crossorigin="anonymous"> <link rel="stylesheet" href=https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap-theme.min.css integrity="sha384-fLW2N01lMqjakBkx3l/M9EahuwpSfeNvV63J5ezn3uZzapT0u7EYsXMjQV+0En5r" crossorigin="anonymous"> <script src=https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js integrity="sha384-0mSbJDEHialfmuBBQP6A4Qrprq5OVfW37PRR3j5ELqxss1yVqOtnepnHVP9aJ7xS" crossorigin="anonymous"></script>