mirror of
https://github.com/DioxusLabs/dioxus
synced 2024-11-27 06:30:20 +00:00
78 lines
2.5 KiB
Rust
78 lines
2.5 KiB
Rust
//! Suspense in Dioxus
|
||
//!
|
||
//! Currently, `rsx!` does not accept futures as values. To achieve the functionality
|
||
//! of suspense, we need to make a new component that performs its own suspense
|
||
//! handling.
|
||
//!
|
||
//! In this example, we render the `Doggo` component which starts a future that
|
||
//! will cause it to fetch a random dog image from the Dog API. Since the data
|
||
//! is not ready immediately, we render some loading text.
|
||
//!
|
||
//! We can achieve the majoirty of suspense functionality by composing "suspenseful"
|
||
//! primitives in our own custom components.
|
||
|
||
use dioxus::prelude::*;
|
||
|
||
fn main() {
|
||
use dioxus::desktop::tao::dpi::LogicalSize;
|
||
dioxus::desktop::launch_cfg(app, |cfg| {
|
||
cfg.with_window(|w| {
|
||
w.with_title("Doggo Fetcher")
|
||
.with_inner_size(LogicalSize::new(600.0, 800.0))
|
||
})
|
||
});
|
||
}
|
||
|
||
#[derive(serde::Deserialize)]
|
||
struct DogApi {
|
||
message: String,
|
||
}
|
||
|
||
fn app(cx: Scope) -> Element {
|
||
cx.render(rsx! {
|
||
div {
|
||
h1 {"Dogs are very important"}
|
||
p {
|
||
"The dog or domestic dog (Canis familiaris[4][5] or Canis lupus familiaris[5])"
|
||
"is a domesticated descendant of the wolf which is characterized by an upturning tail."
|
||
"The dog derived from an ancient, extinct wolf,[6][7] and the modern grey wolf is the"
|
||
"dog's nearest living relative.[8] The dog was the first species to be domesticated,[9][8]"
|
||
"by hunter–gatherers over 15,000 years ago,[7] before the development of agriculture.[1]"
|
||
}
|
||
|
||
h3 { "Illustrious Dog Photo" }
|
||
Doggo { }
|
||
}
|
||
})
|
||
}
|
||
|
||
/// This component will re-render when the future has finished
|
||
/// Suspense is achieved my moving the future into only the component that
|
||
/// actually renders the data.
|
||
fn Doggo(cx: Scope) -> Element {
|
||
let fut = use_future(&cx, || async move {
|
||
reqwest::get("https://dog.ceo/api/breeds/image/random/")
|
||
.await
|
||
.unwrap()
|
||
.json::<DogApi>()
|
||
.await
|
||
});
|
||
|
||
cx.render(match fut.value() {
|
||
Some(Ok(resp)) => rsx! {
|
||
button {
|
||
onclick: move |_| fut.restart(),
|
||
"Click to fetch another doggo"
|
||
}
|
||
div {
|
||
img {
|
||
max_width: "500px",
|
||
max_height: "500px",
|
||
src: "{resp.message}",
|
||
}
|
||
}
|
||
},
|
||
Some(Err(_)) => rsx! { div { "loading dogs failed" } },
|
||
None => rsx! { div { "loading dogs..." } },
|
||
})
|
||
}
|