Скачать или смотреть Why the Value of My Attribute Doesn’t Change in SVG? Learn How to Fix It!

Explore the issue of changing SVG attributes in JavaScript and find a clear, structured solution to change fill color on hover!
---
This video is based on the question https://stackoverflow.com/q/64595788/ asked by the user 'KK 13' ( https://stackoverflow.com/u/14186283/ ) and on the answer https://stackoverflow.com/a/64595890/ provided by the user 'epascarello' ( https://stackoverflow.com/u/14104/ ) 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: Why value of my attribute doesn't change?

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.
---
Why the Value of My Attribute Doesn’t Change in SVG? Learn How to Fix It!

When working with SVG graphics in web development, you may run into a common issue: trying to change an attribute's value and finding it doesn’t change as expected. This guide addresses a specific question: "Why doesn’t the value of my attribute (like color) change?" In this post, I’ll walk you through the problem, its causes, and the solution to modifying SVG fill colors using JavaScript.

The Problem: Attempting to Change Fill Color

In many projects, developers wish to enhance the visual feedback of their components, such as changing the color of an SVG icon on hover. Let's look at the setup from our problem:

Example SVG Element

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

JavaScript Code Attempt

Initially, the attempt to change the color with this JavaScript code was:

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

As you see, when we tried to set the fill property directly on the SVG element, it didn’t work. The biggest issue was how we were trying to access and change the attribute.

The Cause: Incorrect Property Modification

Accessing Styles vs. Attributes

In the original code, the developer was trying to manipulate the fill property, but it was being accessed incorrectly. The fill does not directly change the style of an SVG; instead, you must engage with styles, which require a slightly different approach in JavaScript.

Key Points:

The fill property does not apply where it was expected.

Event listeners were misconfigured to find a child or nested element rather than simply applying to the SVG directly.

The Solution: Changing Style Correctly

To successfully change the fill color on hover, you should modify the style of the SVG element instead of trying to directly alter an attribute. Here’s how you can effectively implement this:

Improved JavaScript Code

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

Explained Steps

Select the SVG Element: The event listener is directly attached to the svg.

Change the Style Property: Use this.style.fill to change the color of the fill when the mouse enters and leaves the element.

Final Implementation

Here’s the full code integrating the SVG and the JavaScript:

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

Conclusion

In the end, if you face issues where the value of an attribute like fill doesn’t change, remember to focus on the style property, rather than directly altering SVG attributes with JavaScript. By adapting your approach, you'll achieve the desired visual effects in your web applications effectively!

With these insights, you’re now empowered to manipulate SVG graphics with confidence. Happy coding!