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A comprehensive guide on how to effectively manage dropdown menus using JavaScript and CSS to ensure only one submenu is open at a time.
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This video is based on the question https://stackoverflow.com/q/71910231/ asked by the user 'nickfindley' ( https://stackoverflow.com/u/636781/ ) and on the answer https://stackoverflow.com/a/71910488/ provided by the user 'ruleboy21' ( https://stackoverflow.com/u/6214210/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Toggling Submenus in Dropdown Menus Made Easy

Dropdown menus are a popular feature in web design, enabling user-friendly navigation. However, a common issue arises when multiple submenus remain open simultaneously. This can lead to a cluttered interface and confuse users. So, how do you ensure that only one submenu is displayed at any time? In this post, we will explore a simple and effective solution using JavaScript and CSS.

The Problem

When you click on a first submenu link, it opens as expected, but if you click on another submenu link, the first submenu remains open. This lack of control can frustrate users who expect the previous submenu to close when they open a new one.

The Solution

We can solve this problem by modifying our JavaScript code a bit. The goal is to hide any other submenus when a new one is opened. Below, I’ll explain how to implement this functionality step-by-step.

Step 1: Update Your HTML Structure

We will use a standard HTML structure for our dropdown menus. Here’s a simple example:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: CSS Styling

Next, we need to add CSS to initially hide all submenus and only show the ones that are selected:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: JavaScript Code to Manage Toggle

Now, let’s write the JavaScript that will manage the opening and closing of the submenus:

[[See Video to Reveal this Text or Code Snippet]]

Explanation of the Code

Event Listener: We add a click event listener to each submenu link.

Toggle Logic: When a submenu link is clicked, we first check if its associated submenu is already visible. If it is, we close it. Otherwise, we hide all other submenus and only show the clicked one.

CSS Classes: We utilize classes menu-hide and menu-show to manage visibility without adding complexity with more CSS classes.

Conclusion

By following these simple steps, you can effectively ensure that only one submenu is visible at a time in your dropdown menus. Not only does this enhance user experience, but it also keeps your design clean and organized. Feel free to modify the styles to suit your design needs, and happy coding!