Migrate from Node.js 20 to Node.js 24

[Copilot]

Migration Plan: Node.js 20 to 24

• Update action.yml to use node24 runtime
• Update .node-version to use Node.js 24.x (v24.12.0 LTS)
• Verify build works with updated configuration
• Fix unit test failures (error message format change in Node.js)
• All tests passing (20/20)
• Code review completed - no issues found
• Security scan completed - no vulnerabilities found
• Verify no breaking changes introduced by migration

Summary

Successfully migrated the GitHub Action from Node.js 20 to Node.js 24.

Changes Made

1. action.yml: Updated runtime from node20 to node24
2. .node-version: Updated from v22.11.0 to v24.12.0 (latest LTS)
3. tests/fetch.test.ts: Updated test to match Node.js 24 error message format

Validation

✅ Build successful
✅ Linter passes
✅ All tests pass (20/20)
✅ Code review passed
✅ Security scan passed
✅ No breaking changes

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Migrate from node.js 20 to 24</issue_title>
<issue_description>

Discussed in JamesIves/github-pages-deploy-action#1939

^{Originally posted by harsha-venugopal-ledn January 7, 2026}
This is basically the same thing again as aws-actions/amazon-ecr-login#608

Github is in the process of migrating to Node.js 24. The announcement and time schedule are: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Actions that use node20 will fail some time around April 2026.

</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Migrate from node.js 20 to 24 #1229

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

[JamesIves]

@copilot Resolve the unit test failures

[Copilot]

@copilot Resolve the unit test failures

Fixed in commit 34bd721. The test failure was due to Node.js 24 changing the error message format for invalid encoding arguments. Updated the test to match the new format and all 20 tests now pass.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.94%. Comparing base (9e121f4) to head (34bd721).
⚠️ Report is 12 commits behind head on dev.

Additional details and impacted files

@@           Coverage Diff           @@
##              dev    #1230   +/-   ##
=======================================
  Coverage   98.94%   98.94%           
=======================================
  Files           4        4           
  Lines          95       95           
  Branches       29       30    +1     
=======================================
  Hits           94       94           
  Misses          1        1           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.