Hello everyone,

Here are the highlights of the new online resources we published this week from 20 Oct 2025 to 27 Oct 2025:

Article: https://www.telerik.com/blogs/boost-site-speed-speculation-rules-api-guide-prerendering-prefetching
Summary: Learn how to use the Speculation Rules API to cut navigation latency by prerendering and prefetching likely next pages. You’ll define a script type=speculationrules with prefetch/prerender rules (document vs list, where href_matches, eagerness), follow constraints such as same-origin prerender and anonymous-client-ip-when-cross-origin for cross-origin prefetch, and gate side effects with document.prerendering and the prerenderingchange event. The guide also shows how to measure impact via PerformanceNavigationTiming (activationStart) and when to choose prefetch vs prerender.

Article: https://www.telerik.com/blogs/static-extraction-css-js-efficiency-react-apps
Summary: Learn how static extraction compiles CSS-in-JS at build time so your React app ships less JavaScript, injects fewer styles at runtime, and reduces bundle size, hydration cost, and render time. The article contrasts runtime CSS-in-JS with statically extracted CSS, outlines build setup (Babel/SWC with Webpack or Vite) to extract CSS and enable effective code splitting and tree shaking, and shows how to handle dynamic styles and validate gains with bundle analyzers and browser DevTools.

Feel free to check them out and share your thoughts!

The Telerik Team

I'm migrating KendoUI for jQuery to React. In jQuery version of Kendo Grid was possible to set "values" property to columns with "id" values.

In React version of the kendo grid, the "values" property for the GridColumn component is not available. How can I make the same like in jQuery version?

Thanks a lot for an each help.

I am currently utilizing a KendoReact Form with an integrated DropDownList component. However, the selected value cannot be cleared by the user. I have reviewed external documentation, but a clear explanation for implementing this functionality is absent. Could you provide a coding example demonstrating how to implement a clear button on the dropdown within this form structure?  

I need to add a clear icon to my dropdown list so that the user can click it to clear the selected value

Hi team, 

Working with complex or even slightly nested CompositeFilterDescriptors gets confusing quick, does KendoReact contain any kind of helpers for managing a filter tree, adding, updating or removeing Composite/FilterDescriptors?

My usecase is that i need to build a composite filter desc where filters contaisn a mix of FilterDescriptor and CompositeFilterDescriptor, and im hanving trouble maintianing such an object, hence the question. 

eg:

// All search mechanisms are external to the Grid component
// eg: https://www.telerik.com/kendo-react-ui/components/grid/filtering/advanced-filtering#filtering-data-grid-through-external-textbox
{
  logic: 'and',
  filters: [
    // This CompFiltDesc is controlled by a single 'Product Search' box, the goal is to find any record where 
    // ther code or description contains any of the text, so 'mix chef' and 'checf mix' return the same thing
    {
      logic: 'or',
      filters: [
        { field: 'productItem.description', operator: 'contains', value: 'chef' },
        { field: 'productItem.code', operator: 'contains', value: 'chef' },
        { field: 'productItem.description', operator: 'contains', value: 'mix' },
        { field: 'productItem.code', operator: 'contains', value: 'mix' }
      ]
    },
    {
      field: 'quantity', operator: 'isnotnull'
    },
    {
      field: 'productItem.attributes', operator: 'contains', value: 'Brand:x'
    }
  ]
}

THanks,
Grant

I'd like to be able to render links as a Dimension value where appropriate.

The Dimension display value is defined as 

displayValue: (item: any) => string

I can't use a jsx fragment here of if I attempt to return an '< a href....' it is html encoded and rendered as html.

Ideally I'd like to add a <Link component but would settle for an <a tag

Is this achievable?

Hi, I use Popover for showing error messages during validation. First it renders fine, but when I switch tabs(my app has multiple tabs) callout disappears completely. Here's how I use the component:

```ts
        <Popover
            show={show}
            anchor={inputRef.current}
            position="bottom"
            contentStyle={{ padding: '0.5em', border: 'black' }}
            collision={{ horizontal: 'flip', vertical: 'flip' }}
            appendTo={container}
        >
```Screenshot attached.

Hi,

If GridColumnProps has { hidden: true} in it, then GridColumnState won't be able to override the `hidden` property anymore.

Please see this example:

https://codesandbox.io/p/sandbox/stoic-wildflower-wn4lzn?file=%2Fapp%2Fapp.tsx%3A11%2C10-11%2C25

Line 15, customerID column's hidden is set to true. Clicking the "Hide" button won't show/hide that column. But if change customerID's `hidden` value to `false`, or just remove that hidden property at line 15. The "Hide" button will work.

Thanks,

Jie