[Blazor] - Issue calling submitRequest on data-enhanced form

[Travis-Th]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

Calling requestSubmit on a form with the data-enhance attribute prints an uncaught TypeError to the console. It complains about accessing a member on a null submitter.

Expected Behavior

I would expect the navigation to be enhanced, and for the form to post.

Steps To Reproduce

Put this form in an SSR page, and click the button. The error should be printed to console.

<form id="test-form" method="post" @formname="my-form-name" data-enhance>
    <AntiforgeryToken />
    <button type="button" onclick="document.getElementById('test-form').requestSubmit()">I print an uncaught TypeError to the console!</button>
</form>

Exceptions (if any)

No response

.NET Version

8.0.200

Anything else?

I think the issue is caused by this line not properly checking for null, but I could be mistaken. Not super familiar with how enhanced navigation works internally.

aspnetcore/src/Components/Web.JS/src/Services/NavigationEnhancement.ts

Line 147 in 870eec2

const submitterValue = event.submitter!.getAttribute('value');