can't bind to `open` attribute on `<details>` or `<dialog>` elements

[andrewschmidgit]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

cannot bind to open attribute

<details @bind-open=IsOpen>
  <summary>Summary</summary>

  expanded text
</details>

@code {
  public bool IsOpen { get; set; }
}

or

<dialog @bind-open=IsOpen>
  content
</dialog>

@code {
  public bool IsOpen { get; set; }
}

Expected Behavior

for this to work, and for any html attribute to be bindable, rather than a list of:

• value
• checked
• others

I can't seem to find a list of the supported bindable attributes or events in the documentation either

Steps To Reproduce

No response

Exceptions (if any)

No response

.NET Version

9.0.304

Anything else?

No response

[MihuBot]

I'm a bot. Here is a possible related and/or duplicate issue (I may be wrong):

• [Blazor] <details> @ontoggle should support 2-way binding #59200

[andrewschmidgit]

I see the @ontoggle, and that works, but my request still stands for @bind to support any attribute

[andrewschmidgit]

please don't use AI to fix this, I'd rather leave it broken