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yew v0.10 Release Notes

Release Date: 2019-11-11 // over 4 years ago

    • ⚡️ 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 this functionality 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::prelude::*;

  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 MyComponent {
    type Message = Msg;
    type Properties = ();

    fn create(_: Self::Properties, _: ComponentLink<Self>) -> Self {
        MyComponent {}
    }

    fn update(&mut self, msg: Self::Message) -> ShouldRender {
        true
    }
}

impl Renderable<MyComponent> for MyComponent {
    fn view(&self) -> Html<Self> {
        html! { "hello" }
    }
}

      After:

      impl Component for MyComponent {
    type Message = Msg;
    type Properties = ();

    fn create(_: Self::Properties, _: ComponentLink<Self>) -> Self {
        MyComponent {}
    }

    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]