Скачать или смотреть How to Add Class to Only One Clicked Element in jQuery

Learn how to customize your jQuery app by allowing only one clicked element to get a special class, enhancing user interaction and experience.
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This video is based on the question https://stackoverflow.com/q/63338689/ asked by the user 'Nightcrawler' ( https://stackoverflow.com/u/13362831/ ) and on the answer https://stackoverflow.com/a/63338747/ provided by the user 'Carsten Løvbo Andersen' ( https://stackoverflow.com/u/2943218/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Add Class to Only One Clicked Element in jQuery

In developing web applications, it’s often important to control how user interactions work. One common challenge developers face is ensuring that when a user clicks on an element (like a number box), only that specific element receives a special style or class. This article addresses a common issue: multiple elements being selected when only one should be at a time.

The Problem

Imagine you're creating an app using jQuery, and you have a few number boxes displayed for user selection. Each time a user clicks on a number box, you want that box to change appearance, indicating it has been selected. However, if clicking on a number box selects multiple boxes instead of just the last one that was clicked, it can be frustrating for users.

Example Scenario

You click on the number box labeled "36".

Then, you click on the number box labeled "41".

Both "36" and "41" are now highlighted, rather than just "41" being highlighted.

This is not the intended behavior, as ideally only the last clicked box should remain active.

The Solution

To achieve this, we can use jQuery to manipulate classes efficiently. Below is a simple implementation that allows only the last clicked number box to retain a special class.

Step 1: Update Your jQuery Code

You need to change the jQuery code that handles the click event so it will remove the special class from all other number boxes before adding it to the one that was clicked. Here’s how you can do that:

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

Step 2: Add the CSS for the Clicked Class

To visually differentiate the selected box from the others, you will want to style the .clickedcolor class. Here’s an updated version of your CSS:

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

Complete Example Code

Here’s a full example combining the HTML, CSS, and JavaScript:

HTML

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

CSS

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

Summary

By following these simple steps, you can effectively manage class application in your jQuery application, ensuring that only the last clicked element retains its unique styling. This small change can significantly improve user experience by providing clear and immediate feedback on their selections.

Feel free to test it out and see how it enhances the functionality of your app!