Allow hx- action attributes (hx-get, hx-put, etc) without a value

[egil]

Enabling the hx- action attributes to be used without specifying a value, which implicitly should set the current URL as the address.

[khalidabuhakmeh]

This might be a quirk of Razor and null values (null values are not rendered on elements). Setting an hx- element to an empty string defaults the behavior the current URL as expected.

[egil]

That may actually be the correct. That is, I think that closes the issue. This way the user has been explicit in that they just want the current url by setting the empty string, where as null is undefined behavior.