formatjs/formatjs
Dec 2025 – Dec 2025
1 Month active
Languages Used
BazelJSONJavaScriptTypeScriptYAML
Technical Skills
BazelConfiguration ManagementDevOpsESLintESMFunctional Programming
Long Ho
PROFILE
Long Ho
Worked on the formatjs/formatjs repository to deliver architectural and quality improvements focused on stability, performance, and developer experience. Led the migration of six internationalization packages and React Intl to ES Module (ESM) format, enabling modern bundlers and improved tree-shaking. Addressed exports issues and enhanced type safety using TypeScript, while refining ESLint plugin rules for better configuration flexibility. Upgraded testing reliability by tuning integration test timeouts and expanding test coverage. Applied configuration management and scripting skills with Bazel and YAML to streamline dependency handling and project automation, resulting in more predictable releases and reduced friction for both consumers and contributors.
Overall Statistics
Feature vs Bugs
50%Features
Repository Contributions
27Total
Bugs
6
Commits
27
Features
6
Lines of code
1,419
Activity Months1
Your Network
34 peopleSame Organization
@perplexity.ai6
Shared Repositories
28
Work History
December 2025
27 Commits • 6 Features
Dec 1, 2025December 2025 (2025-12) monthly summary for the formatjs/formatjs repository. Delivered major architectural and quality improvements that improve stability, performance, and developer experience across the internationalization (i18n) monorepo. Key outcomes include broad ES Module (ESM) adoption, critical exports fixes, test reliability enhancements, and targeted typing/lint improvements that reduce downstream friction for consumers and contributors. Key achievements delivered: - ES Module (ESM) migration across six packages: intl-segmenter, intl-relativetimeformat, intl-durationformat, intl-listformat, intl-displaynames, and vue-intl, enabling modern bundlers and better tree-shaking. Representative commits: 73b80a7e, 3f42e70e, b894e8a3, bef4a103, 33d83c66, 3d498b5c. - React Intl converted to ESM usage to align with modern module systems. Commit: cb93e7dc. - Exports fixed for intl-segmenter, intl-relativetimeformat, and intl-durationformat to restore clean consumption by downstream apps. Commits: 07f700d4, 6c0a0f76, 292b39ec. - ESLint plugin improvement: add support for 'children' in exclude option for no-literal-string-in-jsx, improving DX for lint configuration. Commit: 42de4e0d. - Testing and reliability upgrades: increased integration test timeout to reduce flakiness and expanded test size for intl-numberformat. Commits: 791d59ec, 88cddb45. - Quality, typing, and tooling enhancements: added 2-digit option to ResolvedDurationFormatOptions; moved @types/react to peer dependencies; fixed type in @formatjs/fast-memoize; and various maintenance scripts for lint/lerna-lite workflows. Commits: 1cd96a43, eea10ffd, b05e217c, plus multiple housekeeping commits. Overall impact: - Greater stability for downstream consumers due to reliable builds, clearer exports, and safer typing. - Improved performance and bundle quality through ESM adoption and better tree-shaking. - Faster, more predictable releases driven by improved tests and better tooling. Technologies and skills demonstrated: - Monorepo orchestration and ES Module migration across multiple packages. - TypeScript typings hardening and runtime type safety improvements. - ESLint plugin development and rule enhancements. - Test engineering: timeout tuning and test-size adjustments to balance CI speed with coverage. - Dependency and packaging strategy adjustments (peerDependencies) to reduce install-time friction and version mismatches.
27 Commits • 6 Features
Dec 1, 2025December 2025 (2025-12) monthly summary for the formatjs/formatjs repository. Delivered major architectural and quality improvements that improve stability, performance, and developer experience across the internationalization (i18n) monorepo. Key outcomes include broad ES Module (ESM) adoption, critical exports fixes, test reliability enhancements, and targeted typing/lint improvements that reduce downstream friction for consumers and contributors. Key achievements delivered: - ES Module (ESM) migration across six packages: intl-segmenter, intl-relativetimeformat, intl-durationformat, intl-listformat, intl-displaynames, and vue-intl, enabling modern bundlers and better tree-shaking. Representative commits: 73b80a7e, 3f42e70e, b894e8a3, bef4a103, 33d83c66, 3d498b5c. - React Intl converted to ESM usage to align with modern module systems. Commit: cb93e7dc. - Exports fixed for intl-segmenter, intl-relativetimeformat, and intl-durationformat to restore clean consumption by downstream apps. Commits: 07f700d4, 6c0a0f76, 292b39ec. - ESLint plugin improvement: add support for 'children' in exclude option for no-literal-string-in-jsx, improving DX for lint configuration. Commit: 42de4e0d. - Testing and reliability upgrades: increased integration test timeout to reduce flakiness and expanded test size for intl-numberformat. Commits: 791d59ec, 88cddb45. - Quality, typing, and tooling enhancements: added 2-digit option to ResolvedDurationFormatOptions; moved @types/react to peer dependencies; fixed type in @formatjs/fast-memoize; and various maintenance scripts for lint/lerna-lite workflows. Commits: 1cd96a43, eea10ffd, b05e217c, plus multiple housekeeping commits. Overall impact: - Greater stability for downstream consumers due to reliable builds, clearer exports, and safer typing. - Improved performance and bundle quality through ESM adoption and better tree-shaking. - Faster, more predictable releases driven by improved tests and better tooling. Technologies and skills demonstrated: - Monorepo orchestration and ES Module migration across multiple packages. - TypeScript typings hardening and runtime type safety improvements. - ESLint plugin development and rule enhancements. - Test engineering: timeout tuning and test-size adjustments to balance CI speed with coverage. - Dependency and packaging strategy adjustments (peerDependencies) to reduce install-time friction and version mismatches.
December 2025
Activity
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Quality Metrics
Correctness98.6%
Maintainability94.8%
Architecture97.8%
Performance94.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
BazelJSONJavaScriptTypeScriptYAML
Technical Skills
BazelConfiguration ManagementDevOpsESLintESMFunctional ProgrammingJavaScriptJavaScript developmentNode.jsReactScriptingType SafetyTypeScriptVue.jsYAML
Repositories Contributed To
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