Blur event inside form can cause "no event handler associated with this event" exception

[SteveSandersonMS]

Scenario:

<EditForm OnValidSubmit="NavigateToAnotherPage">
    <input @blur="@(() => {})" />
</EditForm>

Pressing "enter" inside the input causes:

System.ArgumentException: There is no event handler associated with this event. EventId: '45'.
Parameter name: eventHandlerId
  at Microsoft.AspNetCore.Components.RenderTree.Renderer.DispatchEventAsync (:44300/System.UInt64 eventHandlerId, Microsoft.AspNetCore.Components.RenderTree.EventFieldInfo fieldInfo, System.EventArgs eventArgs) <0x3124c68 + 0x00054> in <filename unknown>:0 
  at Microsoft.AspNetCore.Components.WebAssembly.Rendering.WebAssemblyRenderer.DispatchEventAsync (:44300/System.UInt64 eventHandlerId, Microsoft.AspNetCore.Components.RenderTree.EventFieldInfo eventFieldInfo, System.EventArgs eventArgs) <0x31248a0 + 0x00078> in <filename unknown>:0 
  at :44300/Microsoft.AspNetCore.Components.WebAssembly.Rendering.WebAssemblyRenderer.ProcessNextDeferredEventAsync () <0x3477c48 + 0x000a6> in <filename unknown>:0 
    at Object.endInvokeDotNetFromJS (blazor.webassembly.js:1)
    at Object.invokeJSFromDotNet (blazor.webassembly.js:1)

Looks like the "navigate away" gets processed before the "blur", so the component has been disposed by the time we process its "blur" event handler.

[MichaelKueh]

@SteveSandersonMS are there any plans to include this to release 3.2?

[SteveSandersonMS]

Sorry, the deadline for that has already passed. We're really close to the 3.2 release now!

[jameschch]

EDIT: It's not unusual to receive a similar error to this for various events:

blazor.webassembly.js:1 Uncaught (in promise) Error: System.ArgumentException: There is no event handler associated with this event. EventId: '8'.

This can be caused by an error during render which means the element was bound to an event but the error prevented instantiation of the handler.

[jespersh]

I tried playing with this call before NavigateTo

await JSRuntime.InvokeVoidAsync("document.activeElement.blur");

but it only worked the first time I saved my form