Files
dioxus/examples/eval.rs
T
Evan AlmloffandJonathan Kelley 20d146d9bd Simplify the launch builder (#2967)
* improve documentation for the fullstack server context

* Add a section about axum integration to the crate root docs

* make serve_dioxus_application accept the cfg builder directly

* remove unused server_fn module

* improve fullstack config docs

* improve documentation for the server function macro

* fix axum router extension link

* Fix doc tests

* Fix launch builder

* Simplify the launch builder

* don't re-export launch in the prelude

* refactor fullstack launch

* Fix fullstack launch builder

* Update static generation with the new builder api

* fix some formatting/overly broad launch replacements

* fix custom menu example

* fix fullstack/static generation examples

* Fix static generation launch

* A few small formatting fixes

* Fix a few doc tests

* implement LaunchConfig for serve configs

* fix fullstack launch with separate web and server launch methods

* fix check with all features

* dont expose inner core module

* clippy and check

* fix readme

---------

Co-authored-by: Jonathan Kelley <jkelleyrtp@gmail.com>
2024-10-10 16:00:58 -07:00

48 lines
1.7 KiB
Rust

//! This example shows how to use the `eval` function to run JavaScript code in the webview.
//!
//! Eval will only work with renderers that support javascript - so currently only the web and desktop/mobile renderers
//! that use a webview. Native renderers will throw "unsupported" errors when calling `eval`.
use async_std::task::sleep;
use dioxus::prelude::*;
fn main() {
dioxus::launch(app);
}
fn app() -> Element {
// Create a future that will resolve once the javascript has been successfully executed.
let future = use_resource(move || async move {
// Wait a little bit just to give the appearance of a loading screen
sleep(std::time::Duration::from_secs(1)).await;
// The `eval` is available in the prelude - and simply takes a block of JS.
// Dioxus' eval is interesting since it allows sending messages to and from the JS code using the `await dioxus.recv()`
// builtin function. This allows you to create a two-way communication channel between Rust and JS.
let mut eval = eval(
r#"
dioxus.send("Hi from JS!");
let msg = await dioxus.recv();
console.log(msg);
return "hi from JS!";
"#,
);
// Send a message to the JS code.
eval.send("Hi from Rust!".into()).unwrap();
// Our line on the JS side will log the message and then return "hello world".
let res = eval.recv().await.unwrap();
// This will print "Hi from JS!" and "Hi from Rust!".
println!("{:?}", eval.await);
res
});
match future.value().as_ref() {
Some(v) => rsx!( p { "{v}" } ),
_ => rsx!( p { "waiting.." } ),
}
}