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通过官方例子了解项目创建,热更新,以及编译,新版本的yew比之前方便很多,有配套工具,可以做到类似vue与react这样热更新,实时查看自己代码,yew还可以调用外部js与内部调用js api等,官方文档-中文链接。
cargo new yew-app
[dependencies]
# 你可以在此处查看最新版本: https://crates.io/crates/yew
yew = "0.18"
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>Yew App</title>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bulma@0.9.3/css/bulma.min.css">
</head>
</html>
use yew::web_sys;
// 获取js windwos对象
pub fn get_js_window() -> web_sys::Window {
web_sys::window().expect("window not available")
}
pub fn js_alert(msg: &str) {
get_js_window().alert_with_message(msg).expect("alert failed");
}
use yew::{prelude::*}; mod js_api; enum Msg { AddOne, } struct Model { // `ComponentLink` is like a reference to a component. // It can be used to send messages to the component link: ComponentLink<Self>, value: i64, } impl Component for Model { type Message = Msg; type Properties = (); fn create(_props: Self::Properties, link: ComponentLink<Self>) -> Self { Self { link, value: 0, } } fn update(&mut self, msg: Self::Message) -> ShouldRender { match msg { Msg::AddOne => { self.value += 1; js_api::js_alert("hello from wasm!"); // the value has changed so we need to // re-render for it to appear on the page true } } } fn change(&mut self, _props: Self::Properties) -> ShouldRender { // Should only return "true" if new properties are different to // previously received properties. // This component has no properties so we will always return "false". false } fn view(&self) -> Html { html! { <div> <button onclick=self.link.callback(|_| Msg::AddOne)>{ "点击 +1" }</button> <p>{ self.value }</p> </div> } } } fn main() { yew::start_app::<Model>(); }
如果尚未安装 Trunk,请执行以下操作:
cargo install trunk wasm-bindgen-cli
将wasm32-unknown-unknown添加为编译目标。 如果还未安装,请使用 Rustup 运行以下指令:
rustup target add wasm32-unknown-unknown
启动服务,端口为 ‘0.0.0.0:8080’,运行后会将编译文件放在/dist目录(注:如果之前运行后无法运行,删除/target目录重新编译即可)
trunk serve
项目打包
trunk build --release
本文档只是借鉴官方示例演示yew项目如何创建与运行,其中有演示在rust中调用jsapi,但不仅限于此,rust也可以直接调用js代码的,当然由于篇幅限制不在此处展开,有兴趣的小伙伴可以去官方文档中找官方示例其中就包含此种方式;yew有两种运行方式,第一种是通过trunk,第二种是wasm-pack,后者不支持热更新,没有服务必须要自定义或者使用其它服务才能运行,总之后者比较繁琐,当然有能力的小伙伴也可以做到类似trunk的功能的服务,欢迎大家尝试。
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