Function sycamore_reactive::create_selector

pub fn create_selector<'a, U: PartialEq + 'a>(
    cx: Scope<'a>,
    f: impl FnMut() -> U + 'a
) -> &'a ReadSignal<U>

Creates a memoized value from some signals. Unlike create_memo, this function will not notify dependents of a change if the output is the same. That is why the output of the function must implement PartialEq.

To specify a custom comparison function, use create_selector_with.

Example

let state = create_signal(cx, 0);
let double = create_selector(cx, || *state.get() * 2);

assert_eq!(*double.get(), 0);
state.set(1);
assert_eq!(*double.get(), 2);