use-stable

React hook meant to create a stable value that only clears when the dependencies change.

This is different from useMemo, which is a memoized value, that can be recreated even when dependencies don't change:

However, since useMemo is performance optimization, not a semantic guarantee, React may throw away the cached value if there is a specific reason to do that.

This hook is meant for cases that are not pure, usually when the return is a pointer that is meaningful -- for WeakMap, WeakSet, and other associative data structures.

API is the same as useMemo.

import useStable from 'react-use-stable'

function useMyCustomHook(socket) {
    const socket = useStable(()=>new WebSocket(`wss://example.com/${socket}`), [socket]);

    // use socket as a prop for other components/hooks
}