Function use_memo

pub fn use_memo<T, D>(create: impl FnOnce() -> T, deps: Deps<D>) -> Memo<T>
where
    T: 'static,
    D: PartialEq + 'static,

Returns a persisted, memoized value.

This will recompute the value with the given closure whenever the given dependencies has changed from last render. This optimization helps to avoid expensive calculations on every render.

Example

fn render(&self) -> VNode {
  let a = self.a;
  let b = self.b;
  let memo = use_memo(|| compute_expensive_value(a, b), Deps::some((a, b)));

  let vnode = h!(div).build(*memo.value());
  vnode
}