Access Node.js global varibale from Next.js page

global_state.js

'use strict';

let globalVar = null;

module.exports.get = function () {
    return globalVar;
};

module.exports.set = function (v) {
    globalVar = v;
};

index.js

import React from 'react';
import util from 'util';

class Page extends React.Component {
    static async getInitialProps({ req }) {
        let globalState = require('./global_state');
        if (globalState.get() === null) {
            globalState.set(["Initial element"]);
            console.log(globalState.get());
        } else {
            let array = globalState.get();
            array.push(new Date());
            globalState.set(array);
            console.log(globalState.get());
        }
        return { globalVar: globalState.get() };
    }

    render() {
        const { globalVar } = this.props;
        return (
            <div>
                {util.inspect(globalVar)}
            </div>
        );
    }
}

export default Page;