Update Rollup configuration and CI workflow for improved compatibilit… #17
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…y and performance. Changes include setting Babel presets for automatic React runtime, updating Node.js version to 22, and upgrading GitHub Actions to their latest versions.
WalkthroughThe changes update several configuration files. The GitHub Actions workflow now uses the latest action versions and Node.js 22 with an updated caching key. The package version was bumped from 1.0.0 to 1.0.1. The Rollup configuration was enhanced with new output options, revised Babel presets, added node resolution extensions, and a tweak in the CommonJS plugin for mixed modules. Changes
Sequence Diagram(s)sequenceDiagram
participant Dev as Developer
participant CI as GitHub Actions
participant Checkout as Checkout Action v4
participant Setup as Setup Node Action v4
participant Cache as Cache Action v4
Dev->>CI: Push code trigger
CI->>Checkout: Checkout repository files
Checkout-->>CI: Repository files checked out
CI->>Setup: Configure Node.js environment (v22)
Setup-->>CI: Node.js environment ready
CI->>Cache: Cache node modules with updated key
Cache-->>CI: Cache restored/updated
CI->>CI: Execute build/test steps
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🧹 Nitpick comments (1)
.github/workflows/ci.yml (1)
12-12: Fix indentation in workflow fileThe static analysis tool flagged this line for incorrect indentation. While the workflow works fine, it's best to maintain consistent indentation throughout the file.
- - uses: actions/checkout@v4 + - uses: actions/checkout@v4🧰 Tools
🪛 YAMLlint (1.35.1)
[warning] 12-12: wrong indentation: expected 6 but found 4
(indentation)
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.github/workflows/ci.yml(2 hunks)package.json(1 hunks)rollup.config.js(2 hunks)
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🧬 Code Definitions (1)
rollup.config.js (1)
gatsby-node.js (1)
pkg(2-2)
🪛 YAMLlint (1.35.1)
.github/workflows/ci.yml
[warning] 12-12: wrong indentation: expected 6 but found 4
(indentation)
🔇 Additional comments (9)
.github/workflows/ci.yml (2)
12-13: Great update to the latest GitHub Actions and Node.js!Upgrading to actions/checkout@v4, actions/setup-node@v4, and Node.js 22 brings several improvements:
- Enhanced security and performance in GitHub Actions
- Access to latest features in Node.js 22 (released April 2024)
- Better compatibility with modern JavaScript features
Also applies to: 15-15
🧰 Tools
🪛 YAMLlint (1.35.1)
[warning] 12-12: wrong indentation: expected 6 but found 4
(indentation)
27-27: Properly updated cache configuration to match Node.js versionThe cache key and restore-keys now properly reflect the Node.js 22 update, which ensures the correct dependencies are cached and restored between workflow runs.
Also applies to: 30-30, 32-32
package.json (1)
3-3: Version bump is appropriate for configuration changesThe patch version increment (1.0.0 → 1.0.1) correctly follows semantic versioning principles for non-breaking changes like configuration updates.
rollup.config.js (6)
24-26: Improved CommonJS output configurationThese changes enhance module interoperability:
esModule: falseprevents adding__esModuleflags in CommonJS outputinterop: "auto"improves compatibility between different module systems
31-32: Added sourcemap and named exports to ES module outputAdding sourcemaps improves debugging capabilities, while specifying
exports: "named"ensures consistent export behavior across both output formats.
56-57: Added JSX support to node resolverAdding
extensions: [".js", ".jsx"]to the nodeResolve configuration ensures that JSX files are properly processed during the build.
61-62: Improved CommonJS plugin configuration for mixed module supportAdding
transformMixedEsModules: trueimproves compatibility with packages that contain a mix of CommonJS and ES modules, which is increasingly common in the npm ecosystem.
71-71: External dependency for React JSX runtime properly includedThe inclusion of "react/jsx-runtime" as an external dependency aligns with the automatic runtime configuration in Babel, ensuring the new JSX transform works correctly.
49-52:Details
✅ Verification successful
Enhanced Babel configuration for modern React development
The updated Babel presets configuration brings important improvements:
modules: falsefor @babel/preset-env prevents Babel from transforming ES modules, letting Rollup handle itruntime: "automatic"for @babel/preset-react enables the new JSX Transform, eliminating the need for explicit React imports in JSX files
🌐 Web query:
What are the benefits of using the "automatic" runtime in @babel/preset-react?💡 Result:
The "automatic" runtime in
@babel/preset-reactintroduced in React 17 provides several key improvements over the classic JSX transform:Core Benefits
No Manual React Imports
JSX elements now auto-import necessary functions from React’s new JSX entry points (react/jsx-runtime), eliminating the need forimport React from 'react'in every component file[1][4][6]. This reduces boilerplate and prevents unused React imports from bloating bundle sizes.Improved Bundle Size
By replacingReact.createElementcalls with optimized runtime functions, the automatic runtime generates cleaner output code that’s more compressible and avoids unnecessary helper functions[1][4][7]. This leads to smaller production builds overall.Future-Proof Architecture
The new runtime:
- Enables React to optimize JSX compilation independently of Babel updates[4]
- Supports JSX features like fragments and the new
jsxshelper for static children without manual configuration[6][9]- Lays groundwork for React’s upcoming ES Modules support[4]
Simplified Toolchain Configuration
Key setup steps become more straightforward:// .babelrc { "presets": [ ["@babel/preset-react", { "runtime": "automatic", "importSource": "react" // Customizable for other JSX libraries }] ] }No need for additional plugins like
@babel/plugin-transform-react-jsx[4][6][9].Enhanced Development Experience
- Auto-generated component stack traces in error messages[4]
- Better type safety through explicit prop handling[6]
- Built-in support for React 17+ features like new JSX transforms[9]
To migrate existing projects, use React’s codemod script:
npx react-codemod update-react-importsThis removes obsolete React imports and converts legacy patterns to modern syntax[1][4].
First introduced in Babel 7.9.0, the automatic runtime will become the default in Babel 8, making it essential for React developers to adopt this pattern for long-term maintainability and performance[6][9].
Citations:
- 1: https://www.habilelabs.io/blog/introducing-new-jsx-transform-all-you-should-know-about
- 2: https://dev.to/rinconcamilo/setting-up-react-babel-webpack-without-create-react-app-2a1f
- 3: https://www.scaler.com/topics/react/babel-preset-react/
- 4: https://legacy.reactjs.org/blog/2020/09/22/introducing-the-new-jsx-transform.html
- 5: https://codedamn.com/news/reactjs/what-is-the-role-of-webpack-and-babel-in-a-react-application
- 6: https://babeljs.io/docs/babel-plugin-transform-react-jsx
- 7: https://moldstud.com/articles/p-boost-react-performance-with-babel-presets-explained
- 8: babel/babel#12239
- 9: https://babeljs.io/docs/babel-preset-react
- 10: https://babeljs.io/docs/babel-preset-env
- 11: evanw/esbuild#334
- 12: https://dev.to/wojtekmaj/how-to-enable-automatic-runtime-in-react-17-with-babel-preset-react-52l
Babel Preset Improvements Confirmed
The updated configuration in
rollup.config.js(lines 49-52):presets: [ ["@babel/preset-env", { modules: false }], ["@babel/preset-react", { runtime: "automatic" }] ],now leverages the new JSX Transform introduced in React 17. This change:
- Eliminates the need to import React explicitly in every JSX file by auto-importing functions from
react/jsx-runtime.- Helps reduce bundle sizes by allowing Rollup to handle ES modules without Babel transforming them.
- Simplifies the project’s configuration and future-proofs the code by aligning with modern React best practices.
Everything looks correct and no further modifications are required.
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Pull Request Overview
This PR updates the Rollup configuration and CI workflow to improve build performance and reliability by leveraging the latest tooling.
- Updates Rollup configuration with additional export options and Babel presets for automatic React runtime
- Upgrades GitHub Actions workflows (checkout, setup-node, cache) and bumps the Node.js version to 22
Reviewed Changes
Copilot reviewed 2 out of 3 changed files in this pull request and generated no comments.
| File | Description |
|---|---|
| rollup.config.js | Updated output options and Babel presets configuration for better bundling |
| .github/workflows/ci.yml | Upgraded GitHub Actions versions and updated Node.js version to 22 |
Files not reviewed (1)
- package.json: Language not supported
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rollup.config.js:49
- Consider adding tests to verify the updated Babel presets configuration, especially to confirm that the automatic React runtime behavior works as expected.
presets: [
.github/workflows/ci.yml:15
- Confirm that all CI steps and dependencies are fully compatible with Node.js 22 to avoid potential runtime issues.
node-version: '22'
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Copilot reviewed 3 out of 4 changed files in this pull request and generated no comments.
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rollup.config.js:15
- Ensure that the file './libName.cjs' exists and that this change is consistent with the project’s module naming conventions.
const libName = require("./libName.cjs");
rollup.config.js:57
- [nitpick] Confirm that including ".jsx" in the extensions is intentional for module resolution in your project.
extensions: [".js", ".jsx"]
.github/workflows/ci.yml:30
- [nitpick] Verify that the updated cache key for Node 22 does not conflict with previous caches, ensuring a smooth transition in the CI environment.
key: ${{ runner.os }}-node-22-yarn-${{ hashFiles('**/yarn.lock') }}
…y and performance. Changes include setting Babel presets for automatic React runtime, updating Node.js version to 22, and upgrading GitHub Actions to their latest versions.
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