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• ⚡️ Features

  • Future support :tada: A Component can update following the completion of a Future. Check out this example to see how it works. This approach was borrowed from a fork of Yew called plaster created by @carlosdp. [@hgzimmerman, #717]
  • Added the agent and services features so that those modules can be disabled (useful if you are switching to using Futures). [@hgzimmerman, #684]
  • Add ref keyword for allowing a Component to have a direct reference to its rendered elements. For example, you can now easily focus an <input> element after mounting. [@jstarry, #715]

  use stdweb::web::html_element::InputElement;
  use stdweb::web::IHtmlElement;
  use yew::*;
  
  pub struct Input {
      node_ref: NodeRef,
  }
  
  impl Component for Input {
      type Message = ();
      type Properties = ();
  
      fn create(_: Self::Properties, _: ComponentLink<Self>) -> Self {
          Input {
              node_ref: NodeRef::default(),
          }
      }
  
      fn mounted(&mut self) -> ShouldRender {
          if let Some(input) = self.node_ref.try_into::<InputElement>() {
              input.focus();
          }
          false
      }
  
      fn update(&mut self, _: Self::Message) -> ShouldRender {
          false
      }
  
      fn view(&self) -> Html<Self> {
          html! {
              <input ref=self.node_ref.clone() type="text" />
          }
      }
  }
  

  • Make Agent related types public to allow other crates to create custom agents. [@dunnock, #721]
  • Component::change will now return false for components that have Component::Properties == (). [@kellytk, #690]]
  • Updated wasm-bindgen dependency to 0.2.54. Please update your wasm-bindgen-cli tool by running cargo install --force --version 0.2.54 -- wasm-bindgen-cli. [@jstarry, #730], [@ctaggart, #681]

• 🛠 Fixes

  • Fixed the mount order of components. The root component will be mounted after all descendants have been mounted. [@jstarry, #725]
  • All public items now implement Debug. [@hgzimmerman, #673]

• 🚨 Breaking changes

  • Minimum rustc version has been bumped to 1.39.0 for Future support. [@jstarry, #730]

  • Component now has a required view method and automatically implements the Renderable trait. The view method in the Renderable trait has been renamed to render. [@jstarry, #563]

    Before:

    impl Component for Model {
        type Message = Msg;
        type Properties = ();
    
        fn create(_: Self::Properties, _: ComponentLink<Self>) -> Self {
            Model {}
        }
    
        fn update(&mut self, msg: Self::Message) -> ShouldRender {
            true
        }
    }
    
    impl Renderable<Model> for Model {
        fn view(&self) -> Html<Self> {
            html! { "hello" }
        }
    }
    

    After:

    impl Component for Model {
        type Message = Msg;
        type Properties = ();
    
        fn create(_: Self::Properties, _: ComponentLink<Self>) -> Self {
            Model {}
        }
    
        fn update(&mut self, msg: Self::Message) -> ShouldRender {
            true
        }
    
        fn view(&self) -> Html<Self> {
            html! { "hello" }
        }
    }
    

  • Removed the Transferable trait since it did no more than extend the serde Serialize and Deserialize traits. [@hgzimmerman, #319]

    Before:

    impl Transferable for Input {}
    #[derive(Serialize, Deserialize)]
    pub enum Input {
      Connect,
    }
    

    After:

    #[derive(Serialize, Deserialize)]
    pub enum Input {
      Connect,
    }
    

  • WebSocketService::connect will now return a Result in order to stop panicking on malformed urls. [@lizhaoxian, #727]

  • VTag now is boxed within VNode to shrink the size of its enum representation. [@hgzimmerman, #675]