dioxus/packages/web/examples/deep.rs
Jonathan Kelley 508c560320 Feat: massive changes to definition of components
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.
2021-06-01 18:33:15 -04:00

73 lines
1.6 KiB
Rust

use std::rc::Rc;
use dioxus_web::{dioxus::prelude::*, WebsysRenderer};
fn main() {
wasm_logger::init(wasm_logger::Config::new(log::Level::Debug));
console_error_panic_hook::set_once();
wasm_bindgen_futures::spawn_local(WebsysRenderer::start(CustomA))
}
fn CustomA(ctx: Context<()>) -> VNode {
let (val, set_val) = use_state(&ctx, || "abcdef".to_string() as String);
ctx.render(rsx! {
div {
class: "m-8"
"CustomA {val}"
button {
"Upper"
onclick: move |_| set_val(val.to_ascii_uppercase())
}
button {
"Lower"
onclick: move |_| set_val(val.to_ascii_lowercase())
}
components::CustomB {
val: val.clone()
}
}
})
}
mod components {
use std::rc::Rc;
use super::*;
#[derive(Debug, Props, PartialEq)]
pub struct PropsB {
val: String,
}
pub fn CustomB(ctx: Context<PropsB>) -> VNode {
let (first, last) = ctx.val.split_at(3);
ctx.render(rsx! {
div {
class: "m-8"
"CustomB {ctx.val}"
CustomC {
val: first.to_string()
}
CustomC {
val: last.to_string()
}
}
})
}
#[derive(Debug, Props, PartialEq)]
struct PropsC {
val: String,
}
fn CustomC(ctx: Context<PropsC>) -> VNode {
ctx.render(rsx! {
div {
class: "m-8"
"CustomC {ctx.val}"
}
})
}
}