This utility hook provides access to a piece of state and a setter
function, which can be used to supply a temporary value and a duration
for which it is valid, before reverting to preceeding value. Following
the pattern:
const [value, setTransientValue] = useTransientValue<number>(42, 5000);
setTransientValue(69); // value === 69 for 5000ms, before returning to 42
We can easily fire and forget a temporary state transition.
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