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Changelog

0.14.1 (2020-03-14)

  • 🛠 Fixes

    • Connected message was only called for first bridge creation. [@nicklaswj, #1029]

0.14 (2020-03-14)

Happy 🥧 (PI) Day! This release brings a number of bug fixes for web-sys apps and ergonomic improvements to the API. Huge thanks to the community for diving into the migration from stdweb to web-sys so quickly and uncovering these issues!

Changelog

  • ⚡️ Features

  • 🛠 Fixes

    • Fixed panic in stdweb ResizeService event handling. [@nicklaswj, #1014]
    • Removed build check for OS compatibility. [@jstarry, #1019]
    • Fixed interval and timer usage in web-sys workers by updating gloo. [@jstarry, #1018]
    • Send Connected message for Public agents. [@TheNeikos, #1007]
    • Fixed web-sys Public / Private agent initialization. [@jstarry, #1006]
    • Fixed websocket 'text' message handling for web-sys agents. [@jstarry, #1005]
  • 🚨 Breaking changes

    • FetchError::FetchFailed enum variant now wraps a String to hold the failure reason. [@jstarry, #1025]
    • Message APIs now accept Into<Msg>, so calling msg.into() will cause compile errors. [@captain-yossarian, #999]

0.13.2 (2020-03-05)

  • 🛠 Fixes

    • Fix clippy warning when building with web_sys feature. [@jstarry, #1001]

0.13.1 (2020-03-04)

  • 🛠 Fixes

0.13 (2020-03-01)

web-sys support has arrived! @daxpedda spear-headed the effort and courageously integrated web-sys while maintaining support for stdweb through no small amount of cfg macro usage. We chose to continue support for apps built with stdweb because the dev experience is still quite a bit better (Unfortunately cargo-web is incompatible with web-sys). However, the Yew team recognizes that the future of cargo-web of stdweb are uncertain. For this reason, we recommend devs start making the switch over to web-sys and wasm-bindgen. We will likely invest in improving the dev experience with these tools so that switching over is eventually a no-brainer. Please reach out with ideas and feedback for this migration through Github issues and in our Gitter chatroom!

After upgrading to v0.13, devs will now have to opt in to either stdweb or web-sys by using either the "web_sys" or "std_web" on the yew crate in their Cargo.toml.

# Choose `stdweb`
yew = { version = "0.13", features = ["std_web"] }

# Choose `web-sys`
yew = { version = "0.13", features = ["web_sys"] }

Lastly, take note that API docs on https://docs.rs/yew will be using the "web_sys" feature. For "std_web" docs, please visit https://docs.rs/yew-stdweb.

Changelog

  • ⚡️ Features

    • Added support for building apps with web-sys. [@daxpedda, #961]

    • Properties 2.0 [@AlephAlpha, #975]

      Component properties are now assumed to be required unless otherwise annotated with a default value. Check out the proposal issue #928 for more details!

  • 🛠 Fixes

    • Fixed Component children re-rendering bug. [@jstarry, #980]
    • Fixed panic when interacting with agents after receiving an agent message. [@jstarry, #981]
    • Fixed panic when a component with a root VRef node is detached. [@jstarry, #983]
    • Fixed annoying warning when a component with a root VTag node is detached. [@jstarry, #983]
  • 🚨 Breaking changes

    • Changed Properties macro behavior. Check out the proposal issue #928 for more details! [@AlephAlpha, #975]
    • Cleaned up exported apis and doc visibility. [@jstarry, #977]
    • ReaderService methods now return a Result instead of panicking. [@daxpedda, #868]
    • FetchService methods now return a Result instead of panicking. [@daxpedda, #867]
    • StorageService methods now return a Result instead of panicking. [@daxpedda, #827]

0.12 (2020-02-16)

  • ⚡️ Features

    • Improved ergonomics for html! { for .. }. [@jstarry, #875]
    • Added #[props(default = "fn_path")] for specifying a default property value. [@AlephAlpha, #881]
    • Exposed the macros for creating format types. [@ctm, #883]
    • Added support for binary-only and text-only formats in WebSocketService. [@ctm, #851]
    • Implemented PartialEq for ChildrenRenderer to allow children comparison. [@jstarry, #916]
    • Reduced restrictions on ComponentLink methods to improve Future support. [@jplatte, #931]
    • Added referrer, referrer_policy and integrity to FetchOptions. [@leo-lb, #931]
  • 🛠 Fixes

  • 🚨 Breaking changes

    • Switched from using failure to anyhow and thiserror for Yew errors. [@daxpedda, #863]
    • Removed cancel method from Task trait in favor of relying on Drop. [@kakoc, #899]
    • Renamed NodeRef.try_into to NodeRef.cast to avoid trait conflicts. [@jstarry, #917]

0.11 (2020-01-06)

This release aims to lay the groundwork for Yew component libraries and clean up the API for the ever elusive 1.0 release.

Transition Guide

This release comes with a lot of breaking changes. We understand it's a hassle to update projects but the Yew team felt it was necessary to rip a few bandaids off now as we approach a 1.0 release in the (hopefully) near future. To ease the transition, here's a guide which outlines the main refactoring you will need to do for your project. (Note: all of the changes are reflected in the many example projects if you would like a proper reference example)

1. Callback syntax

This is the main painful breaking change. It applies to both element listeners as well as Component callback properties. A good rule of thumb is that your components will now have to retain a ComponentLink to create callbacks on demand or initialize callbacks in your component's create() method.

Before:

struct Model;

enum Msg {
    Click,
}

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 {
        match msg {
            Msg::Click => true,
        }
    }

    fn view(&self) -> Html<Self> {
        // BEFORE: Callbacks were created implicitly from this closure syntax
        html! {
            <button onclick=|_| Msg::Click>{ "Click me!" }</button>
        }
    }
}

After:

struct Model {
  link: ComponentLink<Self>,
}

enum Msg {
    Click,
}

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

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

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

    fn view(&self) -> Html {
        // AFTER: Callbacks need to be explicitly created now
        let onclick = self.link.callback(|_| Msg::Click);
        html! {
            <button onclick=onclick>{ "Click me!" }</button>
        }
    }
}

If a closure has a parameter you will now need to specify the parameter's type. A tip for finding the appropriate type is to search Yew's repo for the HTML attribute the closure is assigned to.

For example, onkeydown of <button>:

let onkeydown = self.link.callback(|e: KeyDownEvent| {
    // ...
});

and

html! {
    <button onkeydown=onkeydown type="button">
        { "button" }
    </button>
}

2. Method Renames

It should be safe to do a project-wide find/replace for the following:

  • send_self( -> send_message(
  • send_back( -> callback(
  • response( -> respond(
  • AgentUpdate -> AgentLifecycleEvent

These renames will probably require some more care:

  • fn handle( -> fn handle_input( (for Agent trait implementations)

3. Drop Generic Types for Html<Self> -> Html

🎉 We are pretty excited about this change! The generic type parameter was confusing and restrictive and is now a thing of the past!

Before:

impl Component for Model {
    // ...

    fn view(&self) -> Html<Self> {
        html! { /* ... */ }
    }
}

After:

impl Component for Model {
    // ...

    fn view(&self) -> Html {
        html! { /* ... */ }
    }
}

4. Properties must implement Clone

In yew v0.8 we removed the requirement that component properties implement Clone and in this release we are adding the requirement again. This change is needed to improve the ergonomics of nested components. The only time properties will be cloned is when a wrapper component re-renders nested children components.

  • ⚡️ Features

    • Added html_nested! macro to support nested iterable children access. [@trivigy, #843]
    • Added bincode to the list of supported formats. [@serzhiio, #806]
    • Added a noop() convenience method to Callback which creates a no-op callback. [@mdtusz, #793]
    • The html! macro now accepts a Callback for element listeners. [@jstarry, #777]
    struct Model {
        onclick: Callback<ClickEvent>,
    }
    
    enum Msg {
        Click,
    }
    
    impl Component for Model {
        type Message = Msg;
        type Properties = ();
    
        fn create(_: Self::Properties, link: ComponentLink<Self>) -> Self {
            Model {
                onclick: link.callback(|_| Msg::Click),
            }
        }
    
        fn update(&mut self, msg: Self::Message) -> ShouldRender {
            match msg {
                Msg::Click => true,
            }
        }
    
        fn view(&self) -> Html {
            html! {
                <button onclick=&self.onclick>{ "Click me!" }</button>
            }
        }
    }
    • Add send_message_batch method to ComponentLink. [@hgzimmerman, #748]
    • Allow compilation to wasi target without wasm_bindgen. [@dunnock, #746]
    • AgentLink now implements Clone which enables Future usage without explicit Yew framework support. [@izissise, #802]
    • ComponentLink now implements Clone which enables Future usage without explicit Yew framework support. [@hgzimmerman, #749]
    use wasm_bindgen::JsValue;
    use wasm_bindgen_futures::future_to_promise;
    
    // future must implement `Future<Output = Component::Message> + 'static`
    let link = self.link.clone();
    let js_future = async move {
        link.send_message(future.await);
        Ok(JsValue::NULL)
    };
    
    future_to_promise(js_future);
  • 🛠 Fixes

    fn view(&self) -> Html {
        html! {
            <Wrapper>
                // This is now valid. (before #780, this would cause a lifetime
                // compile error because children nodes were moved into a closure)
                <Nested on_click=&self.nested_on_click />
            </Wrapper>
        }
    }
    • Creating a Callback with ComponentLink is no longer restricted to mutable references, improving ergonomics. [@jstarry, #780]
    • The Callback reform method no longer consumes self making it easier to "reverse map" a Callback. [@jstarry, #779]
    pub struct ListHeader {
        props: Props,
    }
    
    #[derive(Properties, Clone)]
    pub struct Props {
        #[props(required)]
        pub on_hover: Callback<Hovered>,
        #[props(required)]
        pub text: String,
    }
    
    impl Component for ListHeader {
        type Message = ();
        type Properties = Props;
    
        fn create(props: Self::Properties, _: ComponentLink<Self>) -> Self {
            ListHeader { props }
        }
    
        fn update(&mut self, _: Self::Message) -> ShouldRender {
            false
        }
    
        fn view(&self) -> Html {
            let onmouseover = self.props.on_hover.reform(|_| Hovered::Header);
            html! {
                <div class="list-header" onmouseover=onmouseover>
                    { &self.props.text }
                </div>
            }
        }
    }
    • Reduced allocations in the Classes to_string method. [@hgzimmerman, #772]
    • Empty string class names are now filtered out to prevent panics. [@jstarry, #770]
  • 🚨 Breaking changes

    • Components with generic args now need to be closed with the full type path. (e.g. html! { <Wrapper<String>></Wrapper<String>>}) [@jstarry, #837]
    • Changed VTag listener type from Box<dyn Listener> to Rc<dyn Listener>. [@jstarry, #786]
    • Properties need to implement Clone again in order to improve nested component ergonomics. [@jstarry, #786]
    • Removed send_future method from ComponentLink since it is no longer necessary for using Futures with Yew. [@hgzimmerman, #799]
    • Removed generic type parameter from Html and all virtual node types: VNode, VComp, VTag, VList, VText, etc. [@jstarry, #783]
    • Removed support for macro magic closure syntax for element listeners. (See transition guide for how to pass a Callback explicitly instead). [@jstarry, #782]
    • Renamed Agent methods and event type for clarity. handle -> handle_input, AgentUpdate -> AgentLifecycleEvent, response -> respond. [@philip-peterson, #751]
    • The ComponentLink send_back method has been renamed to callback for clarity. [@jstarry, #780]
    • The ComponentLink send_self and send_self_batch methods have been renamed to send_message and send_message_batch for clarity. [@jstarry, #780]
    • The Agent send_back method has been renamed to callback for clarity. [@jstarry, #780]
    • The VTag children value type has changed from Vec<VNode> to VList. [@jstarry, #754]

0.10 (2019-11-11)

  • ⚡️ Features

    • Future support 🎉 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 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]

0.9.2 (2019-10-12)

  • 🛠 Fixes

    • Fix yew-macro dependency version

0.9.1 (2019-10-12)

Happy Canadian Thanksgiving! 🦃

  • ⚡️ Features

    • Implemented Default trait for VNode so that unwrap_or_default can be called on Option<Html<Self>>. [@hgzimmerman, #672]
    • Implemented PartialEq trait for Classes so that is more ergonomic to use Classes type in component props. [@hgzimmerman, #680]
    • Updated wasm-bindgen dependency to 0.2.50. Please update your wasm-bindgen-cli tool by running cargo install --force --version 0.2.50 -- wasm-bindgen-cli. [@jstarry, #695]
  • 🛠 Fixes

    • Fixed issue where text nodes were sometimes rendered out of order. [@jstarry, #697]
    • Fixed regression introduced in 0.9.0 that prevented tag attributes from updating properly. [@jstarry, #698]
    • Fixed emscripten builds by pinning the version for the ryu downstream dependency. [@jstarry, #703]
    • Updated stdweb to 0.4.20 which fixed emscripten builds and unblocked updating wasm-bindgen to 0.2.50. [@ctaggart, @jstarry, #683, #694]
    • Cleaned up build warnings for missing dyn keywords. [[@benreyn], #687]

0.9 (2019-09-27)

  • ⚡️ Features

    • New KeyboardService for setting up key listeners on browsers which support the feature. [@hgzimmerman, #647]

    • ComponentLink can now create a Callback with more than one Message. The Message's will be batched together so that the Component will not be re-rendered more than necessary. [@stkevintan, #660]

    • Message's to Public Agent's will now be queued if the Agent hasn't finished setting up yet. [@serzhiio, #596]

    • Agent's can now be connected to without a Callback. Instead of creating a bridge to the agent, create a dispatcher like so: MyAgent::dispatcher(). [@hgzimmerman, #639]

    • Component's can now accept children in the html! macro. [@jstarry, #589]

      // app.rs
      
      html! {
        <MyList name="Grocery List">
          <MyListItem text="Apples" />
        </MyList>
      }
      // my_list.rs
      
      use yew::prelude::*;
      
      pub struct MyList(Props);
      
      #[derive(Properties)]
      pub struct Props {
          #[props(required)]
          pub name: String,
          pub children: Children<MyListItem>,
      }
      
      impl Renderable<MyList> for MyList {
        fn view(&self) -> Html<Self> {
          html! {{
            self.props.children.iter().collect::<Html<Self>>()
          }}
        }
      }
    • Iterators can now be rendered in the html! macro without using the for keyword. [@hgzimmerman, #622]

      Before:

      html! {{
        for self.props.items.iter().map(renderItem)
      }}

      After:

      html! {{
        self.props.items.iter().map(renderItem).collect::<Html<Self>>()
      }}
    • Closures are now able to be transformed into optional Callback properties. [@Wodann, #612]

    • Improved CSS class ergonomics with new Classes type. [@DenisKolodin, #585], [@hgzimmerman, #626]

    • Touch events are now supported <div ontouchstart=|_| Msg::TouchStart> [@boydjohnson, #584], [@jstarry, #656]

    • The Component trait now has an mounted method which can be implemented to react to when your components have been mounted to the DOM. [@hgzimmerman, #583]

    • Additional Fetch options mode, cache, and redirect are now supported [@davidkna, #579]

    • The derive props macro now supports Properties with lifetimes [@jstarry, #580]

    • New ResizeService for registering for window size updates [@hgzimmerman, #577]

  • 🛠 Fixes

    • Fixed JS typo in RenderService. This was causing animation frames to not be dropped correctly. [@jstarry, #658]
    • Fixed VNode orphaning bug when destroying VTag elements. This caused some Components to not be properly destroyed when they should have been. [@hgzimmerman, #651]
    • Fix mishandling of Properties where clause in derive_props macro [@astraw, #640]
  • 🚨 Breaking changes

    None

0.8 (2019-08-10)

Props! Props! Props!

This release introduces a more developer friendly way to handle your Component props. Use the new #[derive(Properties)] macro to beef up your props! Property values can now be annotated as #[props(required)] which will enforce that props are present at compile time. This means that your props struct no longer needs to implement Default, so time to clean up all of those prop values you wrapped in Option to have a default value.

  • ⚡️ Features

    • html! - Self-closing html tags can now be used: <div class="marker" /> [@totorigolo, #523]
    • html! - SVG name-spaced tags are now supported! [@jstarry, #550]
    • Properties can now be required at compile time [@jstarry, #553]
    • App components can now be mounted with properties [@jstarry, #567]
    • Apps can now be mounted as the <body> tag [@jstarry, @kellytk, #540]
    • Content editable elements can now trigger oninput events [@tiziano88, #549]
  • 🛠 Fixes

    • html! - Class name order is now preserved which unlocks the use of Semantic UI [@charvp, #424]
    • html! - Dashed tag names and properties are supported [@jstarry, #512, #550]
    • html! - All rust keywords can be used as tag attributes [@jstarry, #550]
    • html! - Support Callback closure with explicit return type [@totorigolo, #564]
    • html! - Fixed edge case where > token would break parser [@totorigolo, #565]
    • Performance improvement to the diff engine [@totorigolo, #539]
    • Properties no longer need to implement the PartialEq, Clone, or Default traits [@jstarry, #553]
    • Component will not panic if the change method is unimplemented [@jstarry, #554]
  • 🚨 Breaking changes

    • The Component::Properties associated type must implement the new Properties trait [@jstarry, #553]

      The new Properties trait is what powers the ability to check required props are present at compile time. Use the derive props macro to implement automatically.

      use yew::Properties;
      
      #[derive(Properties)]
      pub struct Props {
        #[props(required)]
        pub value: MyStruct,
      }
    • Callback props no longer transform into Option types [@jstarry, #553]

      html! { <Button on_click=Msg::Click /> }

      before:

      #[derive(PartialEq, Clone, Default)]
      pub struct Props {
          on_click: Option<Callback<()>>,
      }

      after: note the #[props(required)] attribute

      #[derive(PartialEq, Properties)]
      pub struct Props {
          #[props(required)]
          on_click: Callback<()>,
      }

0.7 (2019-07-19)

Commas? We don't need no stinkin' commas!

This release brings a new and improved html! macro for writing JSX-like syntax. Commas and colons are no longer necessary now that the macro is written as a procedural macro.

  • ⚡️ Features

    • html!{} is now valid syntax and can be used to render nothing [@jstarry, #500]
    • Apps can now be built without cargo-web using wasm-bindgen [@jstarry, #497]
    • Callback now implements Debug [@DenisKolodin, #485]
    • New utility method for getting the host of the current page [@DenisKolodin, #509]
  • 🛠 Fixes

    • html! - Commas are no longer necessary for splitting up attributes [@jstarry, #500]
    • html! - Colons are no longer necessary for denoting a Component tag [@jstarry, #500]
    • Textarea value can be now be set: <textarea value="content"> [@DenisKolodin, #476]
    • changed StorageService::restore to take an immutable receiver [@dermetfan, #480]
    • Fixed a component rendering bug [@jstarry, #502]

0.6 (2019-02-20)

  • ⚡️ Features

    • Added start_app convenience method for initializing the app and mounting it to the body [@DenisKolodin, #462]
    • Added handling of files of input element. There is now a ChangeData::Files variant for the onchange handler [@DenisKolodin, #464]
    • Added ReaderService to read data from File instances. [@DenisKolodin, #464, #468]
  • 🛠 Fixes

    • It was impossible to set value attribute for any tag instead of option, because it used inner value of VTag to keep the value for input element. Now value attribute works for options, progress tags, etc.
  • 🔮 Examples

0.5 (2019-02-01)

🎶 Secret Agent Man 🎶

This release introduces the concept of an Agent. Agents are separate activities which you could run in the same thread or in a separate thread. There are three types of agents Context, Job, Public described below. To connect to an agent use the Worker::bridge method and pass a link of component's environment to it.

  • ⚡️ Features

    • Introduced the concept of an Agent which can run processes in other contexts:
      • Context agent spawns once per thread
      • Job agent spawns for every bridge
      • Public agent spawns an agent in a separate thread (it uses Web Workers API under the hood).
    • Allow setting the whole properties struct of a component with <Component: with props />
    • ComponentLink now has a send_self method which allows components to update themselves [@DenisKolodin, #365]
    • All services are re-exported within the yew::services module.
    • html! macro supports multiple classes in a single string: <a class="button is-primary",>.
    • Added FetchOptions to allow setting Credentials of fetch request.
    • FetchService aborts requests using AbortController.
    • Added SubmitEvent with onsubmit rule.
  • 🛠 Fixes

    • Bug with emscripten target RuntimeError: index out of bounds fixed with a new scheduler [@DenisKolodin, #272]
  • 🚨 Breaking changes

    • send_back method requires a mutable reference to self. This was added to prevent creating callbacks in view implementations. [@DenisKolodin, #367]
    • Context requirement removed. It's no longer necessary to use Component<CTX> type parameter. Instead, a link to the environment is provided with the Component::create call. [@DenisKolodin, #272]

0.4 (2018-06-01)

0.3 (2018-04-23)

0.2 (2018-01-08)

0.1 (2017-12-31)