Created attachment 148594 [details]
demo sidebar in falkon browser

SUMMARY
I have a website rendered with mdBook-0.4.18 (static site generator for documentation). mdbook using
localStorage.getItem to store the item object and display the toc (table of contents) sidebar.

        <!-- Hide / unhide sidebar before it is displayed -->
        <script type="text/javascript">
            var html = document.querySelector('html');
            var sidebar = 'hidden';
            if (document.body.clientWidth >= 1080) {
                try { sidebar = localStorage.getItem('mdbook-sidebar'); } catch(e) { }
                sidebar = sidebar || 'visible';
            }
            html.classList.remove('sidebar-visible');
            html.classList.add("sidebar-" + sidebar);
        </script>

The sidebar appearance is saved when uploaded to https (panduan.langitketujuh.id), but is not successfully saved when the website is opened offline. I don't know if this is because it doesn't support it in Falkon browser or from the mdbook side. I just wanted to report it. Thank you ^^

STEPS TO REPRODUCE
1. $ git clone https://gitlab.com/langitketujuh/l7-docs #or other mdbook site.
2. $ cd l7-docs/
3. $ mdbook build
4. open docs/html/index.html with falkon browser.
5. enable sidebar.
6. go to next page.
7. sidebar again closes. should still be open.

OBSERVED RESULT
-

EXPECTED RESULT
localStorage.getItem() works properly when the file is offline.

SOFTWARE/OS VERSIONS
Operating System: Void Linux
KDE Plasma Version: 5.24.4
KDE Frameworks Version: 5.93.0
Qt Version: 5.15.2

ADDITIONAL INFORMATION
-