Access a variable on a Site tab from within a Page

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,
6

In case anyone is interested, here is my reengineered code THAT WORKS.

/public/pageNavigation.js

import {session} from 'wix-storage';
import wixLocation from 'wix-location';

export function currentPage() {
    session.setItem("page", wixLocation.url);
}
export function previousPage() {
 return session.getItem("page");
}

In the page navigating FROM

import {currentPage} from 'public/pageNavigation.js';
import {previousPage} from 'public/pageNavigation.js';
import {session} from 'wix-storage';

$w.onReady(function () {
 // NOTE: if navigating from Members Only page to SVCGR File Share page, then currentPage MUST
 //          be set in the Members Only page
 
 // Set this page URL in the public/pageNavigation.js shared module
    currentPage();

In the page navigated TO

import {currentPage} from 'public/pageNavigation.js';
import {previousPage} from 'public/pageNavigation.js';

$w.onReady(function () {
 // NOTE: if navigating from Members Only page to SVCGR File Share page, then currentPage MUST
 //          be set in the Members Only page
 let prevPage = previousPage();