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use gloo::utils::window;
use yew::prelude::*;
use super::{use_event_with_window, use_mount, use_raf_state};
/// A sensor hook that tracks Window scroll position.
///
/// # Example
///
/// ```rust
/// # use yew::prelude::*;
/// #
/// use yew_hooks::prelude::*;
///
/// #[function_component(UseWindowScroll)]
/// fn window_scroll() -> Html {
/// let state = use_window_scroll();
///
/// html! {
/// <>
/// <b>{ " X: " }</b>
/// { state.0 }
/// <b>{ " Y: " }</b>
/// { state.1 }
/// </>
/// }
/// }
/// ```
#[hook]
pub fn use_window_scroll() -> (f64, f64) {
let state = use_raf_state(|| {
(
window().page_x_offset().unwrap(),
window().page_y_offset().unwrap(),
)
});
{
let state = state.clone();
use_event_with_window("scroll", move |_: Event| {
state.set((
window().page_x_offset().unwrap(),
window().page_y_offset().unwrap(),
));
});
}
{
let state = state.clone();
use_mount(move || {
state.set((
window().page_x_offset().unwrap(),
window().page_y_offset().unwrap(),
));
});
}
*state
}