Hello Srdjan,

You can find two similar requests here:

• https://feedback.telerik.com/blazor/1489185-combobox-to-select-all-text-when-clicking-in-it-to-type
• https://feedback.telerik.com/blazor/1454982-always-highlight-all-numerictextbox-content-on-focus

and Vote for them and Follow them if that's what you're looking for.

Such DOM manipulations, however, are something that can be a problem in Blazor - if something else happens and the component re-renders that selection state will be lost, which is why I'd suggest you consider doing this with JS like the examples in those pages above do. This is not something that Blazor has C# API for so it will always be done with JS.

Considering that, is there a problem with doing this with JS?

Regards,
Marin Bratanov
Progress Telerik