dioxus/packages/hooks/README.md
2021-11-29 11:10:40 -05:00

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# Common hooks for Dioxus
This crate includes some basic useful hooks for dioxus:
- use_state
- use_ref
- use_collection
- use_task
- use_signal
## use_state
The king daddy of state hooks.
You can always use it "normally" with the `split` method:
```rust
// Normal usage:
let value = use_state(cx, || 10);
// "Classic" usage:
let (value, set_value) = use_state(cx, || 0).split();
```
## use_ref
## use_rwlock
A multithreaded form of RwLock for use in tasks
```rust
let val = use_rwlock(cx, || 10);
use_task((), || async loop {
*val.write().unwrap() += 1;
async_std::task::delay(Duration::from_ms(1000)).await;
});
use_task((), || async loop {
*val.write().unwrap() -= 1;
async_std::task::delay(Duration::from_ms(500)).await;
});
```
## use_hashmap
Store a memoized collection with similar semantics to use_state. Comes with a bunch of utility methods to make working with collections easier. Is essentially a wrapper over the immutable hashmap in im-rc.
```rust
let todos = use_hashmap(cx, |map| map.insert("bob", "bill"));
cx.render(rsx!(
button { onclick: move |_| todos.insert("bob", "bill")
"add random todo"
}
)
```
## use_task
use_task submits a task to the dioxus task queue to be progressed during Dioxus's async event loop. The task must not return anything
## use_signal