Скачать или смотреть How to Style SVG Text Elements by Adding and Removing CSS Classes Using JavaScript

Discover how to effectively manage CSS styles for SVG text elements by dynamically adding and removing classes with JavaScript. Enhance your web development skills today!
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This video is based on the question https://stackoverflow.com/q/63936488/ asked by the user 'Meryem Achemlal' ( https://stackoverflow.com/u/13390847/ ) and on the answer https://stackoverflow.com/a/63937807/ provided by the user 'A Haworth' ( https://stackoverflow.com/u/10867454/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Managing CSS Styles in SVG: Adding and Removing Classes with JavaScript

When working with SVG (Scalable Vector Graphics), you might encounter the need to style specific elements dynamically. In this guide, we’ll tackle a common problem: how to assign a specific CSS class to an SVG text element when clicked, while simultaneously removing the same class from all other text elements.

The Problem: Dynamic Class Management

Suppose you have a set of <text> elements inside your SVG and you want each one to change style when clicked. However, you don’t want multiple text elements to have the same style at once. The desired behavior is straightforward:

Clicking an SVG text element should apply a specific style.

All other SVG text elements should revert to their original styles.

The Solution: JavaScript Class Manipulation

With JavaScript, you can achieve this dynamically. Here’s how you can implement this solution:

1. Selecting the SVG Text Elements

First, ensure you have SVG text elements structured properly in your HTML. Each should have a class, for example, svg-text. Here’s a sample structure:

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

2. Adding the Click Event

You will want to add an event listener for click events on these SVG text elements. When a text element is clicked, the event will trigger a function that manages the CSS classes.

Here’s the JavaScript code needed:

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

Explanation of the Code:

Selecting Elements: The code uses document.querySelectorAll to gather all elements with the class svg-text.

Adding Event Listener: An event listener is added to each element, listening for click events.

Removing Class: On each click, it first clears the svg-style class from any SVG text element that currently has it by using getElementsByClassName.

Adding Class: Finally, it adds the svg-style class to the clicked text element using this.classList.add.

Conclusion

By following this approach, you can effectively manage the styling of SVG text elements in your web applications. This not only enhances user interaction but also improves the overall user experience by providing visual feedback.

In summary:

Use JavaScript to manipulate CSS classes dynamically.

Ensure only one text element has the specific style at any one time by clearing styles of others.

With this knowledge, you can continue to improve your web development skills and create more dynamic, interactive user interfaces! Feel free to experiment with different styles and SVG structures.