<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8" />
        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
        <title>Flex Layout Example</title>
        <script>
            (function () {
                const saved = localStorage.getItem("sidebar-splitview-sidebarWidth");
                const root = document.documentElement;

                if (saved) {
                    root.style.setProperty("--sidebar-splitview-sidebar-width", `${saved}vw`);
 