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Basic error boundary example

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Greg Johnston 2023-02-08 19:31:22 -05:00
parent 7c25f59a68
commit 73420affed
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10
examples/error_boundary/Cargo.toml Normal file
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[package]
name = "error_boundary"
version = "0.1.0"
edition = "2021"
[dependencies]
leptos = { path = "../../leptos" }
console_log = "0.2"
log = "0.4"
console_error_panic_hook = "0.1.7"

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examples/error_boundary/Makefile.toml Normal file
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[tasks.build]
command = "cargo"
args = ["+nightly", "build-all-features"]
install_crate = "cargo-all-features"
[tasks.check]
command = "cargo"
args = ["+nightly", "check-all-features"]
install_crate = "cargo-all-features"

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examples/error_boundary/README.md Normal file
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# Leptos `<ErrorBoundary/>` Example
This example shows how to handle basic errors using Leptos.
To run it, just issue the `trunk serve --open` command in the example root. This will build the app, run it, and open a new browser to serve it.
> If you don't have `trunk` installed, [click here for install instructions.](https://trunkrs.dev/)

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examples/error_boundary/index.html Normal file
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<!DOCTYPE html>
<html>
<head>
<link data-trunk rel="rust" data-wasm-opt="z"/>
<link data-trunk rel="icon" type="image/ico" href="/public/favicon.ico"/>
</head>
<body></body>
</html>

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examples/error_boundary/src/lib.rs Normal file
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use leptos::*;
#[component]
pub fn App(cx: Scope) -> impl IntoView {
let (value, set_value) = create_signal(cx, Ok(0));
// when input changes, try to parse a number from the input
let on_input = move |ev| set_value(event_target_value(&ev).parse::<i32>());
view! { cx,
<h1>"Error Handling"</h1>
<label>
"Type a number (or something that's not a number!)"
<input type="number" on:input=on_input/>
// If an `Err(_) had been rendered inside the <ErrorBoundary/>,
// the fallback will be displayed. Otherwise, the children of the
// <ErrorBoundary/> will be displayed.
<ErrorBoundary
// the fallback receives a signal containing current errors
fallback=|cx, errors| view! { cx,
<div class="error">
<p>"Not a number! Errors: "</p>
// we can render a list of errors
// as strings, if we'd like
<ul>
{move || errors.get()
.0
.into_iter()
.map(|(_, e)| view! { cx, <li>{e.to_string()}</li>})
.collect::<Vec<_>>()
}
</ul>
</div>
}
>
<p>
"You entered "
// because `value` is `Result<i32, _>`,
// it will render the `i32` if it is `Ok`,
// and render nothing and trigger the error boundary
// if it is `Err`. It's a signal, so this will dynamically
// update when `value` changes
<strong>{value}</strong>
</p>
</ErrorBoundary>
</label>
}
}

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examples/error_boundary/src/main.rs Normal file
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use error_boundary::*;
use leptos::*;
pub fn main() {
_ = console_log::init_with_level(log::Level::Debug);
console_error_panic_hook::set_once();
mount_to_body(|cx| {
view! { cx,
<App/>
}
})
}