Remove Deref of wrapped type in custom_event macro

Implementing Deref automatically prevents users from providing a more
strongly typed alternatives.

This will be common when wrapping `web_sys::CustomEvent`, as a user
could provide a `detail` method on the event which returns a specific
type and not just a JsValue.

Author: mc1098

packages/yew-macro/src/custom_event.rs

@@ -76,23 +76,15 @@ pub fn custom_event_impl(name: CustomEventName, custom_event: CustomEvent) -> To
 
         #base
 
-        impl ::std::ops::Deref for #ident{
-            type Target = #inner_type;
-
-            fn deref(&self) -> &Self::Target {
-                &self.0
-            }
-        }
-
         impl ::std::convert::AsRef<::yew::web_sys::Event> for #ident {
             fn as_ref(&self) -> &::yew::web_sys::Event {
-                &self.0
+                self.0.as_ref()
             }
         }
 
         impl ::std::convert::AsRef<::wasm_bindgen::JsValue> for #ident {
             fn as_ref(&self) -> &::wasm_bindgen::JsValue {
-                &self.0
+                self.0.as_ref()
             }
         }
 

website/docs/concepts/html/elements.md

@@ -421,7 +421,6 @@ html! {
 #### Traits implemented
 
 The `custom_event` attribute macro implements the following traits:
-- [`Deref`](https://doc.rust-lang.org/std/ops/trait.Deref.html) where `Target` is the type wrapped by this Newtype.
 - [`AsRef<T>`](https://doc.rust-lang.org/std/convert/trait.AsRef.html) where `T` is:
     - [`JsValue`](https://rustwasm.github.io/wasm-bindgen/api/wasm_bindgen/struct.JsValue.html)
     - [`Event`](https://rustwasm.github.io/wasm-bindgen/api/web_sys/struct.Event.html)