docs: big updates to the reference

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Jonathan Kelley committed 2021-07-16 16:11:25 -04:00
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@@ -1,27 +1,27 @@
//! Example: Suspense
//! -----------------
//! This example shows how the "use_fetch" hook is built on top of Dioxus' "suspense" API. Suspense enables components
//! to wait on futures to complete before rendering the result into VNodes. These VNodes are immediately available in a
//! "suspended" fashion and will automatically propogate to the UI when the future completes.
//! This example demonstrates how the use_suspense hook can be used to load and render asynchronous data. Suspense enables
//! components to wait on futures to complete before rendering the result into VNodes. These VNodes are immediately
//! available in a suspended" fashion and will automatically propogate to the UI when the future completes.
//!
//! Note that if your component updates or receives new props while it is awating the result, the future will be dropped
//! and all work will stop. In this example, we store the future in a hook so we can always resume it.
//! Currently, suspense futures are non-restartable. In the future, we'll provide more granular control of how to start,
//! stop, and reset these futures.
use dioxus::prelude::*;
fn main() {}
#[derive(serde::Deserialize)]
struct DogApi {
message: String,
}
const ENDPOINT: &str = "https://dog.ceo/api/breeds/image/random";
pub static App: FC<()> = |cx| {
let doggo = use_future_effect(cx, move || async move {
match surf::get(ENDPOINT).recv_json::<DogApi>().await {
pub static Example: FC<()> = |cx| {
let doggo = cx.use_suspense(
|| surf::get(ENDPOINT).recv_json::<DogApi>(),
|cx, res| match res {
Ok(res) => rsx!(in cx, img { src: "{res.message}" }),
Err(_) => rsx!(in cx, div { "No doggos for you :(" }),
}
});
},
);
cx.render(rsx!(
div {
@@ -30,34 +30,3 @@ pub static App: FC<()> = |cx| {
}
))
};
// use dioxus_core::virtual_dom::SuspendedContext;
use futures::Future;
use futures::FutureExt;
use std::pin::Pin;
fn use_fetch<'a, T, P, F>(cx: Context<P>, url: &str, g: F) -> VNode<'a>
where
T: serde::de::DeserializeOwned + 'static,
// F: FnOnce(SuspendedContext, surf::Result<T>) -> VNode<'a> + 'a,
F: FnOnce((), surf::Result<T>) -> VNode<'a> + 'a,
{
todo!()
// // essentially we're doing a "use_effect" but with no dependent props or post-render shenanigans
// let fetch_promise = cx.use_hook(
// move || surf::get(url).recv_json::<T>().boxed_local(),
// // just pass the future through
// |p| p,
// |_| (),
// );
// cx.suspend(fetch_promise, g)
}
/// Spawns the future only when the inputs change
fn use_future_effect<'a, 'b, F, P, F2>(cx: Context<P>, g: F2) -> VNode<'a>
where
F: Future<Output = VNode<'b>>,
F2: FnOnce() -> F + 'a,
{
todo!()
}