RocketChat/Rocket.Chat

import { Accounts } from 'meteor/accounts-base';
import { Meteor } from 'meteor/meteor';
import { Tracker } from 'meteor/tracker';

Tracker.autorun(() => {
    const userId = Meteor.userId();

    // Check for Meteor.loggingIn to be reactive and ensure it will process only after login finishes
    // preventing race condition setting the rc_token as null forever
    if (userId && Meteor.loggingIn() === false) {
        const secure = location.protocol === 'https:' ? '; secure' : '';

        document.cookie = `rc_uid=${escape(userId)}; path=/${secure}`;
        document.cookie = `rc_token=${escape(Accounts._storedLoginToken() as string)}; path=/${secure}`;
    }
});