Скачать или смотреть Resolve Your JavaScript Class-Name Dilemma: Change Styles on Click

Struggling to change the styles of clicked elements in JavaScript without affecting others? Learn how to fix class name issues and implement targeted changes with this guide.
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This video is based on the question https://stackoverflow.com/q/73780118/ asked by the user 'kujitsu kuji' ( https://stackoverflow.com/u/20037656/ ) and on the answer https://stackoverflow.com/a/73780180/ provided by the user 'Barmar' ( https://stackoverflow.com/u/1491895/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Change Styles on Click Without Affecting All Elements in JavaScript

When building interactive web applications, you may encounter a common problem: how to change the styles of specific elements without affecting all elements with the same class. This guide addresses a user's challenge where clicking on a button changes the color of multiple elements. Let’s break down the issue and how to effectively solve it.

The Problem

Imagine a scenario where you have several buttons that share a common class name. You want to change the style (like background color or text color) of only the clicked button and its associated element, rather than all elements with that class. In our example, clicking one button inadvertently changes the color of all key-selector elements, which is not the desired outcome.

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

This means we need to ensure that only the specific button and its related elements get updated when clicked.

Understanding the Code

Let's take a look at the JavaScript code that is currently causing the issue. The code iterates through all elements with the class button and applies an event listener for the click event:

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

Key Issue

The problem lies in this section:

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

This snippet selects all key-selector elements and changes their color when any button is clicked, instead of just the one related to the clicked button.

The Solution

To fix the issue, we need to isolate the key-selector element related to the button that was clicked. This is done by selecting the key-selector within the current button's scope rather than applying it to all.

Revised JavaScript Code

Here's a fixed version of the JavaScript code:

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

Key Changes

Using querySelector: The change utilizes the querySelector method to only affect the key-selector within the currently clicked button. This prevents the style changes from affecting other unrelated elements.

Conclusion

By following this guide, you can ensure that only the clicked button and its associated elements are affected by your JavaScript styling logic. This enhances user experience and eliminates unintended style changes when interacting with multiple elements.

Feel free to implement this solution in your projects and achieve the desired interactive behavior!