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https://github.com/DioxusLabs/dioxus
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74 lines
2.5 KiB
Rust
74 lines
2.5 KiB
Rust
#![allow(non_snake_case)]
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//! Suspense in Dioxus
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//!
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//! Currently, `rsx!` does not accept futures as values. To achieve the functionality
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//! of suspense, we need to make a new component that performs its own suspense
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//! handling.
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//!
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//! In this example, we render the `Doggo` component which starts a future that
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//! will cause it to fetch a random dog image from the Dog API. Since the data
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//! is not ready immediately, we render some loading text.
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//!
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//! We can achieve the majority of suspense functionality by composing "suspenseful"
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//! primitives in our own custom components.
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use dioxus::prelude::*;
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use dioxus_desktop::{Config, LogicalSize, WindowBuilder};
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fn main() {
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LaunchBuilder::new(app)
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.cfg(
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Config::new().with_window(
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WindowBuilder::new()
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.with_title("Doggo Fetcher")
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.with_inner_size(LogicalSize::new(600.0, 800.0)),
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),
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)
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.launch()
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}
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fn app() -> Element {
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rsx! {
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div {
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h1 { "Dogs are very important" }
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p {
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"The dog or domestic dog (Canis familiaris[4][5] or Canis lupus familiaris[5])"
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"is a domesticated descendant of the wolf which is characterized by an upturning tail."
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"The dog derived from an ancient, extinct wolf,[6][7] and the modern grey wolf is the"
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"dog's nearest living relative.[8] The dog was the first species to be domesticated,[9][8]"
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"by hunter–gatherers over 15,000 years ago,[7] before the development of agriculture.[1]"
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}
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h3 { "Illustrious Dog Photo" }
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Doggo {}
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}
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}
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}
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/// This component will re-render when the future has finished
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/// Suspense is achieved my moving the future into only the component that
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/// actually renders the data.
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fn Doggo() -> Element {
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let fut = use_future(|| async move {
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#[derive(serde::Deserialize)]
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struct DogApi {
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message: String,
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}
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reqwest::get("https://dog.ceo/api/breeds/image/random/")
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.await
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.unwrap()
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.json::<DogApi>()
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.await
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});
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match fut.value().read().as_ref() {
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Some(Ok(resp)) => rsx! {
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button { onclick: move |_| fut.restart(), "Click to fetch another doggo" }
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div { img { max_width: "500px", max_height: "500px", src: "{resp.message}" } }
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},
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Some(Err(_)) => rsx! { div { "loading dogs failed" } },
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None => rsx! { div { "loading dogs..." } },
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}
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}
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