Скачать или смотреть How to Animate CSS with jQuery When Adding Classes

Discover effective techniques for animating CSS transitions with jQuery as classes are added or removed, creating smooth animations for your web projects.
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This video is based on the question https://stackoverflow.com/q/62637813/ asked by the user 'twan' ( https://stackoverflow.com/u/5941337/ ) and on the answer https://stackoverflow.com/a/62638169/ provided by the user 'Ahmed Tag Amer' ( https://stackoverflow.com/u/9765951/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Animate CSS with jQuery: A Smooth Transition for Your Logo

The problem of animating CSS when adding a class through jQuery can be tricky for many developers. You might find yourself facing unexpected jumps or abrupt changes in your elements, much like the issue described in a recent query. In this post, we'll guide you step-by-step through the solution, ensuring your logo smoothly transitions as the user scrolls down the page.

The Challenge

You want a logo that resizes smoothly when a user scrolls down the page. You have attempted to use CSS keyframes, but the logo visually jumps back to its original size when scrolling back up, rather than transitioning smoothly. This may create a frustrating user experience.

Your Initial Approach

Here’s a quick look at your current setup:

HTML Structure for the logo:

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

jQuery Functionality for scrolling:

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

CSS Styling for transition:

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

Despite attempting to add a transition to your CSS for a smoother effect, you're still encountering issues. Let's explore how we can refine this approach.

The Solution

To achieve the desired smooth transition effect when the class is added or removed, follow these steps:

1. Modify the jQuery Scroll Event

First, ensure the scroll event is set up correctly. Here’s a revised version of your jQuery script:

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

2. Adjust CSS for Smooth Transition

Next, we’ll update your CSS to ensure that the logo resizes smoothly. Instead of max-height, we’ll use height with !important to ensure our rules apply correctly. Here's what your updated CSS should look like:

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

3. Integrate Everything Together

Lastly, wrap everything in a full HTML context to implement smoothly on your webpage:

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

Final Tips

Test the Positioning: Ensure the logo's positioning is set to fixed so it behaves as expected during scrolling.

Transition Duration: Adjust the transition duration based on your design preference for smoother or quicker transitions.

With these modifications, your logo should now resize smoothly as users scroll down, avoiding any jarring jumps and maintaining a professional appearance on your website. Happy coding!