mirror of
https://github.com/DioxusLabs/dioxus
synced 2024-12-24 11:33:08 +00:00
508c560320
This change switches back to the original `ctx<props>` syntax for commponents. This lets lifetime elision to remove the need to match exactly which lifetime (props or ctx) gets carried to the output. As such, `Props` is currently required to be static. It *is* possible to loosen this restriction, and will be done in the future, though only through adding metadata about the props through the Props derive macro. Implementing the IS_STATIC trait is unsafe, so the derive macro will do it through some heuristics. For now, this unlocks sharing vnodes from parents to children, enabling pass-thru components, fragments, portals, etc.
65 lines
1.6 KiB
Rust
65 lines
1.6 KiB
Rust
//! Example: Context API
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//! --------------------
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//! This example demonstrates how to use the raw context api for sharing state throughout the VirtualDOM Tree.
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//! A custom context must be its own unique type - otherwise use_context will fail. A context may be c
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//!
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//!
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//!
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//!
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//!
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//!
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//!
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//!
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use dioxus_core::prelude::*;
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use dioxus_web::WebsysRenderer;
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fn main() {
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wasm_logger::init(wasm_logger::Config::new(log::Level::Trace));
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console_error_panic_hook::set_once();
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wasm_bindgen_futures::spawn_local(WebsysRenderer::start(Example));
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}
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#[derive(Debug)]
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struct CustomContext([&'static str; 3]);
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static Example: FC<()> = |ctx| {
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ctx.use_create_context(|| CustomContext(["Jack", "Jill", "Bob"]));
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ctx.render(rsx! {
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div {
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class: "py-12 px-4 text-center w-full max-w-2xl mx-auto"
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span {
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class: "text-sm font-semibold"
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"Dioxus Example: Jack and Jill"
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}
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h2 {
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class: "text-5xl mt-2 mb-6 leading-tight font-semibold font-heading"
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"Hello"
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}
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CustomButton { id: 0 }
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CustomButton { id: 1 }
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CustomButton { id: 2 }
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}
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})
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};
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#[derive(Props, PartialEq)]
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struct ButtonProps {
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id: u8,
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}
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fn CustomButton(ctx: Context, props: &ButtonProps) -> VNode {
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let names = ctx.use_context::<CustomContext>();
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let name = names.0[ctx.id as usize];
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ctx.render(rsx!{
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button {
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class: "inline-block py-4 px-8 mr-6 leading-none text-white bg-indigo-600 hover:bg-indigo-900 font-semibold rounded shadow"
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"{name}"
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}
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})
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}
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