stremio-web/src/common/useDeepEqualMemo.js

// Copyright (C) 2017-2020 Smart code 203358507

const React = require('react');
const isEqual = require('lodash.isequal');

const useDeepEqualMemo = (cb, deps) => {
    const valueRef = React.useRef();
    const mountedRef = React.useRef(false);
    const prevDepsRef = React.useRef(deps);
    if (!mountedRef.current || !isEqual(prevDepsRef.current, deps)) {
        valueRef.current = cb();
        prevDepsRef.current = deps;
    }
    React.useLayoutEffect(() => {
        mountedRef.current = true;
    }, []);
    return valueRef.current;
};

module.exports = useDeepEqualMemo;