leptos_use

Function is_none

Source 
pub fn is_none<V, T>(value: V) -> Signal<bool>
where
    Option<T>: Send + Sync,
    V: Into<Signal<Option<T>>>,
    T: 'static,
Expand description

Reactive Option::is_none().

ยงUsage

let (example, set_example) = signal(
    if js_sys::Math::random() < 0.5 { Some("Example") } else { None }
);

let is_empty = is_none::<_, &str>(example);