Maybe CSS3 can do more nice text,textarea,button, but in IE7&8, can not support border-radius,box-shadow,text-shadow, so we must use picture to do this. I want to all the form element seems the same in KendoUI support browsers. Just like: Uniform,Niceforms,Jquery FormOne,jqTransform,jNice and so on...
Although Kendo has fency filters with different operators (StartsWith, Contains) on different columns based on data type, Most business users like to have excel AutoFilter(Multi select checkbox) where they can choose what companies, countries they want to see You can see a live demo here at - select company, country or any other column. http://demos.devexpress.com/MVC/GridView/Filtering
Though KendoUI already has an MVVM style binding, it would be much better to have a css binding allowing us to set class on HTML elements based on arbitrary conditions. Just look at the Knockoutjs css binding.
Currently only an array of page size integers can be set in the pageable.pageSizes property. It would be really great to have an option for adding "All" within the dropdown somehow.
Big SPA projects need to have an architecture for the code, some structure. Current examples for SPA are suitable for small apps, so some docs/examples/guidelines for bigger projects would be useful.
The option to allow new items to be added to the list, as opposed to items exclusively in the datasource. For example see this: http://jsbin.com/iXEtonO/4/edit, only built in
Currently templates are only supported when the DropDownList is in an open state. Ideally, the DropDownList should have the ability to display a template when in a closed (selected) state as well. A common use case is to display icons next to the dataTextField. However in it's current state, when an item is selected the icon is no longer able to be displayed.
The event args from column.groupHeaderTemplate (and groupFooterTemplate) should contain a function to retrieve the data for that group. Currently, they only contain "field" and "value." If you made the grouped rows available in this event, clients would be free to add multiple aggregate columns of the same type (i.e., get the "sum" of multiple values instead of being limited to a single value). I've been able to halfway implement this, but it only works correctly if I'm only grouping by one column. For example, if I'm grouped by WidgetName and then by ProductCode, my event args for ProductCode should contain a function to return data rows for only rows matching the current ProductCode and WidgetName.
Add a visible property to the column items for the grid control. Then provide the value in the view-model. This would allow us to declare the columns in html and manage their visibility in the business logic.
Please provide support (e.g. base classes) to help structuring and modularizing applications. Otherwise the framework is another control library and will not compete with full JS/HTML5 like frameworks like Sproutcore, ExtJS4. Most of the UI frameworks lacks of such support, especial for building serious enterprise applications.
Editor does not support placeholder. It would be nice, to have this feature. Posting suggestion based on forum topic: http://www.telerik.com/forums/placeholder-html-attribute
Add MVVM support for PanelBar, so sections can be added dynamicaly from ViewModel. Currently no MVVM support exists for PanelBar, but there is already MVVM support implemented for TreeView (both of them use hierarchical datasource).