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feat: implement Pure CSS Scroll-Driven Header Morphing System #82512 - #82629

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feat: implement Pure CSS Scroll-Driven Header Morphing System #82512#82629
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Dev1822:feature/scroll-driven-header-morph-82512

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@Dev1822

@Dev1822 Dev1822 commented Aug 13, 2026

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Description

Implement a scroll-driven header system where a large hero header smoothly morphs, shrinks, and docks into a compact sticky navigation bar as the page scrolls down using native CSS \�nimation-timeline: scroll(root);\ and \�nimation-range: 0px 250px;.

Fixes Issue

Closes #82512

Changes Introduced

  • Added \components/header-morph.css\ with @Keyframes headerMorph\ and @supports not (animation-timeline: scroll())\ fallback rules.
  • Registered component in \easemotion.css\ and rebuilt minified bundles (\easemotion.min.css, \docs/easemotion.min.css).
  • Added unit tests in \ ests/smoke.test.js.
  • Provided a full page demo and documentation in \submissions/examples/scroll-driven-header-morph/.

Verification


  • pm test: 5/5 test files passed (61/61 tests passed).

  • pm run lint: 0 lint errors.

  • pm run release:check: Passed.

@github-actions github-actions Bot added animation Animation effects, hover interactions, motion ideas, transitions good first issue Good for newcomers GSSoC-26 Official GSSoC 2026 issue gssoc:approved Approved for GSSoC contributions help wanted Extra attention needed level:intermediate Requires moderate project understanding type:feature New functionality or enhancement contribution documentation labels Aug 13, 2026
@SAPTARSHI-coder SAPTARSHI-coder added the invalid This doesn't seem right label Aug 13, 2026
@SAPTARSHI-coder

SAPTARSHI-coder commented Aug 13, 2026

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🔒 Pull Request Closed: This PR has been automatically closed because it modifies files inside the docs/ directory. The docs/ folder is maintained by the core team only. Contributors must place their work exclusively inside submissions/examples/your-feature-name/. Thank you!

@SAPTARSHI-coder

SAPTARSHI-coder commented Aug 13, 2026

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❌ PR Closed — Files Outside submissions/ Folder

@Dev1822, this PR has been automatically closed because it modifies files outside the allowed submissions/ directory:

  • components/header-morph.css
  • docs/easemotion.min.css
  • easemotion.css
  • easemotion.min.css
  • tests/smoke.test.js

What to do

Contributions must only add files inside the submissions/ folder. Please:

  1. Create a new branch
  2. Add only your submission files under submissions/examples/your-feature-name/
  3. Open a new PR

See the contribution guide for details.

— EaseMotion CSS Guard

@github-actions github-actions Bot added gssoc:invalid invalid-submission and removed gssoc:approved Approved for GSSoC contributions labels Aug 13, 2026
@github-actions

github-actions Bot commented Aug 13, 2026

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🔒 PR Closed (Unmerged). This PR was closed without being merged. No GSSoC points or credit awarded.

@SAPTARSHI-coder

SAPTARSHI-coder commented Aug 13, 2026

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❌ Submission Validation Failed

Thank you for your contribution! However, some required files are missing or incorrect.

📋 Required Structure

submissions/your-category/your-feature-name/ (e.g., submissions/examples/ or submissions/docs/)
├── demo.html     ← Interactive demo with DOCTYPE, html, head, body tags
├── style.css     ← Your original CSS (not copy-pasted from a template)
└── README.md     ← Brief description of your feature

🔍 Issues Found:

🔠 Strict Code Integrity Protection

  • ❌ Repository rule violation: You are not allowed to change existing code. Modified existing files: docs/easemotion.min.css, easemotion.css, easemotion.min.css, tests/smoke.test.js.
  • ❌ Repository rule violation: You are not allowed to delete any code.

🔠 Core Framework Protection

  • ❌ PR modifies core framework/configuration files: components/header-morph.css, docs/easemotion.min.css, tests/smoke.test.js. Contributors may only modify files inside the submissions/ directory.

📝 How to Fix:

  1. Ensure all 3 files exist with real, original content
  2. demo.html must have <!DOCTYPE html>, <html>, <head>, <body> tags
  3. style.css must contain your own CSS (not copy-pasted boilerplate)
  4. Push fixes to this branch — the validator will re-run automatically

📖 See CONTRIBUTING.md for full guidelines.

@SAPTARSHI-coder

SAPTARSHI-coder commented Aug 13, 2026

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🔒 Pull Request Closed

This PR was automatically closed because it failed the submission validation check.

Please fix the issues listed above, then open a new pull request. Thank you!

@github-actions

github-actions Bot commented Aug 13, 2026

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📊 CSS Bundle Size Benchmark

This PR changes the size of easemotion.min.css.

Metric Base Branch This PR Difference
Raw 174.09 KB 176.92 KB 📈 +2.83 KB
Gzip 28.61 KB 29.02 KB 📈 +0.41 KB
Brotli 22.66 KB 23.01 KB 📈 +0.35 KB

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Labels

animation Animation effects, hover interactions, motion ideas, transitions contribution documentation good first issue Good for newcomers gssoc:invalid GSSoC-26 Official GSSoC 2026 issue help wanted Extra attention needed invalid This doesn't seem right invalid-submission level:intermediate Requires moderate project understanding needs-files type:feature New functionality or enhancement

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[FEATURE] Pure CSS Scroll-Driven Header Morphing System

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