This change adds tag helpers and defines event types for all of the DOM
events we could find. You'll find it much easier now to subcribe to
these events.
While we did define new event types, we didn't substantially expand the
set of data that we serialize for events. We're looking for feedback on
what is most critical to have, and looking for contributions adding
those data and tests.
This change adds support for mapping DOM event handlers as tag helpers
that function in a bi-modal way.
This is a new first-class feature for DOM events, and replaces a few
workarounds like using `@onclick(...)` or `click=@{ ... }`. I haven't
removed those things yet, this is a first pass to get the new support
in, we'll remove those things when we're totally satisfied.
When used with a string like `<button onclick="foo" />` the result is
a simple HTML attribute .
But when used with an implicit expression like
`<button onclick="@Foo" />` or
`<button onclick="@(x => Clicked = true)" />` a C# function is bound to
the click event from the DOM.
Ryan Nowak
Steve Sanderson