How to Remove active Class from Parent and underline Class from Child on Click in JavaScript скачать в хорошем качестве

How to Remove active Class from Parent and underline Class from Child on Click in JavaScript

Learn how to dynamically manage classes in JavaScript by removing the `active` class from parent elements and the `underline` class from child elements upon clicking list items. --- This video is based on the question https://stackoverflow.com/q/75009194/ asked by the user 'Sarah' ( https://stackoverflow.com/u/19638773/ ) and on the answer https://stackoverflow.com/a/75009384/ provided by the user 'DreamBold' ( https://stackoverflow.com/u/12743692/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions. Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: I want to drop the active class in the parent and the underline class in the child when a new list item is clicked Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l... The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license. If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com. --- Managing Active States in JavaScript: Removing and Adding CSS Classes Dynamically Managing class states in a web application is a common requirement, particularly when dealing with navigation or interactive lists. If you are looking to update CSS classes based on user interactions, you may find yourself needing to remove certain classes from elements and apply them to others upon clicking different list items. In this guide, we will explore a straightforward solution to this issue, making sure that only the clicked item remains active. The Problem You may have a list of items where the first item starts with an active class on its parent li element, as well as an underline class on its child a element. When a new item is clicked, you want to ensure that the previously active item loses its active status, along with its child's underline class, while the clicked item inherits these classes. If not handled correctly, the classes can remain on multiple items, leading to confusion for users. Our Initial Code Approach Below is an example of the starting setup and JavaScript logic you might have: HTML Structure [[See Video to Reveal this Text or Code Snippet]] JavaScript that Needs Improvement [[See Video to Reveal this Text or Code Snippet]] The Solution Enhanced JavaScript Code To effectively manage the classes across the different list items, you can refactor your JavaScript code to remove the classes from all items before applying them to the clicked item. Here’s the right way to implement it: [[See Video to Reveal this Text or Code Snippet]] Explanation of the New Code Use of forEach: Instead of a traditional for loop, we utilize the forEach method which provides a cleaner and more modern approach to iterating through the list elements. Event Listener: This code attaches an event listener to each list item (li). When an item is clicked, unlike before, it first clears the active and underline classes from all elements. Adding Classes: After clearing the classes, we apply the active and underline classes only to the clicked item. CSS to Style the Links You also need to ensure that you have the appropriate CSS to convey the visual feedback: [[See Video to Reveal this Text or Code Snippet]] Conclusion This solution effectively manages the active and underline classes on your list items, ensuring that only one item can be highlighted at a time based on user interaction. By using clear logic and modern JavaScript methods, this approach remains easy to understand and maintain. Always remember that managing user interfaces efficiently can significantly enhance the user experience on your web pages. Now you are ready to implement this functionality in your own projects. Happy coding!