[js/main.js] Replace setInterval with requestAnimationFrame in scroll handler

[yugalkaushik]

Description
Fixed a memory leak in the scroll handler that was causing unnecessary CPU usage.

• Replaced setInterval with requestAnimationFrame
• Now only runs when user actually scrolls
• Stops automatically when tab is inactive

This PR fixes #2470

Notes for Reviewers

Signed commits

• Yes, I signed my commits.

[welcome]

Yay, your first pull request! 👍 A contributor will be by to give feedback soon. In the meantime, please review the Newcomers' Guide and sure to join the community Slack.
Be sure to double-check that you have signed your commits. Here are instructions for making signing an implicit activity while peforming a commit.

[netlify]

✅ Deploy Preview for mesheryio-preview ready!

Name	Link
🔨 Latest commit	902dd75
🔍 Latest deploy log	https://app.netlify.com/projects/mesheryio-preview/deploys/695960c75d489b0008ddb605
😎 Deploy Preview	https://deploy-preview-2471--mesheryio-preview.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify project configuration.

[gemini-code-assist]

Summary of Changes

Hello @yugalkaushik, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request addresses a performance issue and memory leak within the application's scroll handler. By transitioning from a fixed-interval setInterval approach to the more efficient requestAnimationFrame, the changes ensure that scroll-related updates are synchronized with the browser's rendering cycle, leading to smoother performance and reduced CPU consumption. The handler is now more intelligent, only running when needed and pausing when the tab is not in focus.

Highlights

• Performance Optimization: Replaced setInterval with requestAnimationFrame in the scroll handler to significantly reduce CPU usage and fix a memory leak.
• Efficient Scroll Handling: The scroll handler now only executes its logic when the user is actively scrolling, preventing unnecessary computations.
• Resource Management: The scroll handling mechanism automatically pauses when the browser tab is inactive, conserving system resources and battery life.

Using Gemini Code Assist

The full guide for Gemini Code Assist can be found on our documentation page, here are some quick tips.

Invoking Gemini

You can request assistance from Gemini at any point by creating a comment using either /gemini <command> or @gemini-code-assist <command>. Below is a summary of the supported commands on the current page.

Feature	Command	Description
Code Review	/gemini review	Performs a code review for the current pull request in its current state.
Pull Request Summary	/gemini summary	Provides a summary of the current pull request in its current state.
Comment	@gemini-code-assist	Responds in comments when explicitly tagged, both in pull request comments and review comments.
Help	/gemini help	Displays a list of available commands.

Customization

To customize Gemini Code Assist for GitHub experience, repository maintainers can create a configuration file and/or provide a custom code review style guide (such as PEP-8 for Python) by creating and adding files to a .gemini/ folder in the base of the repository. Detailed instructions can be found here.

Limitations & Feedback

Gemini Code Assist may make mistakes. Please leave feedback on any instances where its feedback is incorrect or counter productive. You can react with 👍 and 👎 on @gemini-code-assist comments. If you're interested in giving your feedback about your experience with Gemini Code Assist for Github and other Google products, sign up here.

You can also get AI-powered code generation, chat, as well as code reviews directly in the IDE at no cost with the Gemini Code Assist IDE Extension.

Footnotes

1. Review the Privacy Notices, Generative AI Prohibited Use Policy, Terms of Service, and learn how to configure Gemini Code Assist in GitHub here. Gemini can make mistakes, so double check it and use code with caution. ↩

[gemini-code-assist]

Code Review

This pull request effectively replaces an inefficient setInterval-based scroll handler with a more performant requestAnimationFrame approach. This is a great improvement for performance and user experience. However, I've identified a potential issue with error handling in the new implementation. If the changeHeader() function were to throw an error, the scroll handler would become permanently disabled. I've left a specific comment with a suggestion to make the implementation more robust by using a try...finally block. Otherwise, the change is excellent.

[kishore08-07]

@yugalkaushik
Thank you for your contribution!
Let's discuss this during the website call today at 6:30 PM IST | 7 AM CT
Add it as an agenda item to the meeting minutes, if you would :)

[kishore08-07]

@yugalkaushik
Thank you for your contribution!
Let's discuss this during the websites meet on 05/01/2026 at 6:30 PM IST | 7 AM CT
Add it as an agenda item to the meeting minutes, if you would :)

[yugalkaushik]

@kishore08-07 this PR needs some more work so I'll add this in next meeting.