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Ciro Nunes 14 Sep 22 Rust Front-end with Yew πŸ¦€πŸ‡¦πŸ‡Ί

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Agenda ⁉ What is Yew? Why Wasm & Rust? πŸͺ„ Simple tutorial 🀩 My impressions πŸ—Ί Where to go from here

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What is Yew? Why Wasm & πŸ¦€?

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What is Yew?

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Yew Rust / Wasm client web app framework

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Yew Multi-threaded front-end web apps using WebAssembly πŸŽπŸ’¨

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Yew Multi-threaded front-end web apps using WebAssembly πŸŽπŸ’¨ β€’ Component-based

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Yew Multi-threaded front-end web apps using WebAssembly πŸŽπŸ’¨ β€’ Component-based β€’ Great performance

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Yew Multi-threaded front-end web apps using WebAssembly πŸŽπŸ’¨ β€’ Component-based β€’ Great performance β€’ JavaScript interoperability

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Why Wasm?

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WebAssembly Low-level assembly-like language with a compact binary format that runs with near-native performance and provides languages like Rust with a compilation target that can run in modern web browsers.

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WebAssembly Not a silver bullet for improving performance of web apps πŸ€ͺ

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WebAssembly Not a silver bullet for improving performance of web apps πŸ€ͺ β€’ DOM APIs from Wasm are still slower than directly from JS

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WebAssembly Not a silver bullet for improving performance of web apps πŸ€ͺ β€’ DOM APIs from Wasm are still slower than directly from JS β€’ Perfect for heavy computation applications

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WebAssembly Not a silver bullet for improving performance of web apps πŸ€ͺ β€’ DOM APIs from Wasm are still slower than directly from JS β€’ Perfect for heavy computation applications β€’ Multi-threading via Web Workers

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Why Rust?

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Rust Helps developers write safer code with its rich type system and ownership model

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Simple tutorial

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Let’s build a To-do app

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# [ derive(Clone)] struct Todo { text: String, completed: bool, }

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struct TodoComponent { todos: Vec, new_todo_txt: String, }

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enum Msg { AddTodo, UpdateNewTodo(String), }

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impl Component for TodoComponent { type Message = Msg; type Properties = (); fn create(_ctx: &Context) - > Self {} fn update(&mut self,_ctx, msg: Self : : Message) - > bool {} fn view(&self, ctx: &Context) - > Html {} }

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fn create(_ctx: &Context) - > Self { Self { todos: vec![Todo { text: "Learn Rust".to_string(), completed: true, }], new_todo_txt: "".to_string(), } }

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fn view(&self, ctx: &Context) - > Html { let link = ctx.link(); let on_cautious_change = link.batch_callback(|e: Event| { let input = e.target_dyn_into: : < HtmlInputElement>(); input.map(|input| Msg : : UpdateNewTodo(input.value())) }); html! {
    { self.todos.iter().map(|todo| html! {
  1. {format!("{}", todo.text)} < / span> < / li> }).collect: : < Html>()} < / ol>
    { "Add" } < / button> < / div> < / div> } }

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fn update(&mut self, _ctx: &Context, msg: Self : : Message) - > bool { match msg { Msg : : AddTodo = > { let new_todo = Todo { text: self.new_todo_txt.to_string(), completed: false, }; self.new_todo_txt = "".to_string(); self.todos.push(new_todo); true } Msg : : UpdateNewTodo(new_txt) = > { self.new_todo_txt = new_txt; true } } }

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use yew : : prelude : : *; fn main() { yew : : start_app: : < TodoComponent>(); }

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My impressions

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My impressions Yew

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My impressions Yew β€’ Very similar to React, but it’s Rust

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My impressions Yew β€’ Very similar to React, but it’s Rust β€’ Easy to setup and learn the basics

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My impressions Yew β€’ Very similar to React, but it’s Rust β€’ Easy to setup and learn the basics β€’ Good documentation

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My impressions Yew β€’ Very similar to React, but it’s Rust β€’ Easy to setup and learn the basics β€’ Good documentation β€’ Looks promising

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Where to go from here

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Where to go from here Yew

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Where to go from here Yew β€’ Check out the docs yew.rs

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Where to go from here Yew β€’ Check out the docs yew.rs β€’ Learn about Properties, Function Components, Hooks, Agents and the Router

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Where to go from here Yew β€’ Check out the docs yew.rs β€’ Learn about Properties, Function Components, Hooks, Agents and the Router β€’ Checkout stylist for CSS-in-Rust

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Where to go from here Yew β€’ Check out the docs yew.rs β€’ Learn about Properties, Function Components, Hooks, Agents and the Router β€’ Checkout stylist for CSS-in-Rust β€’ Take advantage of Rust parallelism in Wasm for heavy computations

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Thanks for listening ✌