Unplanned
Last Updated: 04 Jan 2021 08:29 by ADMIN
Srdjan
Created on: 16 Dec 2020 08:14
Category: UI for Blazor
Type: Feature Request
5
Focus events for Inputs

Greetings!

 

Since the focus events are natively supported by blazor, could they be implemented in the input controls? Workarounds via JS are possible but they create a lot of redundant and cluttered code around the code base. OnChange/ValueChange only fire when the value has changed. Though, we have a lot of scenarios where we need the focus events when a value did not change.

1 comment
ADMIN
Marin Bratanov
Posted on: 16 Dec 2020 08:25

Hi Srdjan,

The focus method is a new thing in .NET 5 and you can follow its implementation here: https://feedback.telerik.com/blazor/1497943-add-a-focus-method-for-all-applicable-component-references . If that's what you're looking for, Vote for it and Follow it, so we can mark this as a duplicate.

As for handling the variety of DOM events that are possible (such as clicks, focusin, focusout and so on), the following article shows how you can do that: https://docs.telerik.com/blazor-ui/knowledge-base/inputs-handle-keyboard-events. Exposing dozens of events on a component will slow it down immensely, and will cause many re-renders on both the component and its parent and siblings, so it is not something we can do off the bat - for a component those events need to be EventCallbacks which will cause a performance hit.

Another thing that can be useful is the approach from this article on knowing when an input loses focus versus losing focus and having a changed value: https://docs.telerik.com/blazor-ui/knowledge-base/ddl-onchange-fires-twices.

If you are looking for something different than these, could you provide some more details on the scenario and how our components prevent you from achieving it?

 

Regards,
Marin Bratanov
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