How to Persist Menu State on Page Reload: Exploring Storage Options

Persisting Menu State on Page Reload

The goal is to maintain the expanded state of a menu button on page reload. To achieve this, consider using localStorage to store the menu state. Upon page load, check if the localStorage variable exists and restore the corresponding menu item to its previously expanded state.

Implementation

Using jQuery Storage API

1. Include the jQuery Storage API plugin:

<code class="html"><script src="https://github.com/julien-maurel/jQuery-Storage-API/blob/master/jquery.storageapi.js"></script></code>

2. Initialize localStorage:

<code class="javascript">$(function () {
    $.storage.init(); 
});</code>

3. Store the menu state:

<code class="javascript">var menuState = {
    expandedItem: "..."
}
$.storage.set("menuState", menuState);</code>

4. On page load, restore the menu state:

<code class="javascript">$(function () {
    ...
    var menuState = $.storage.get("menuState");
    if (menuState) {
        var expandedItem = menuState.expandedItem;
        $("#" + expandedItem).addClass("clicked hovered");
    }
});</code>

Pros and Cons of Storage Locations

• localStorage: Persistent per browser, accessible by the same domain, survives page reloads, suitable for storing user preferences or settings.
• sessionStorage: Temporary per browser tab, lost on tab closure, suitable for storing temporary data within a single browsing session.

Alternative Storage Methods

• Cookies: Server-side storage, accessible by domain, limited capacity.
• Database: Server-side storage, requires database setup and connection, suitable for maintaining user-specific data.

Note: The specific storage location may vary based on the application requirements and performance considerations.

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