ASP.NET Core tag helpers don't allow me to escape attributes annotated with @

[luisabreu]

Hello guys.

While migrating an existing app, I've noticed that the new tag helpers won't let me escape attributes annotated with @. In my case, I have an existing MVC 5 app that I'm migrating to the ASP.NET Core. The existing code looked like this:

<form action="@Url.Action(...)" @@submit="save()">

The server side is trying to use the shortcut notation for Vue's v-on: and the generated HTML looked like this:

<form action="/..." @submit="save()">

When this view got migrated to ASP.NET Core, the code was changed to look like this:

<form asp-action="..." asp-controller="..." @@submit="save()">

However, now the @«submit attribute isn't outputted (it's simply discarded from the generated HTML).

Is this a bug? If that is not the case, how can I output attributes annotated with @?

@thanks.

Luis

[mkArtakMSFT]

Thanks for contacting us, @luisabreu.
@NTaylorMullen thoughts?

[NTaylorMullen]

Thanks for the report @luisabreu. I've been able to reproduce your issue and this is indeed an issue on our end.

To workaround the issue you can use the @Url.Action in association with the non-TagHelper variant of form:
<!form action="@Url.Action(...)" @@submit="save()">