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.
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|---|---|---|
| .. | ||
| ChildComponent_Simple | ||
| ChildComponent_WithChildContent | ||
| ChildComponent_WithExplicitEventHandler | ||
| ChildComponent_WithExplicitStringParameter | ||
| ChildComponent_WithLambdaEventHandler | ||
| ChildComponent_WithNonPropertyAttributes | ||
| ChildComponent_WithPageDirective | ||
| ChildComponent_WithParameters | ||
| EventHandler_OnElement_WithDelegate | ||
| EventHandler_OnElement_WithLambdaDelegate | ||
| EventHandler_OnElement_WithString | ||