My defaultOpenJSLanguage

Node.js (plain JavaScript)

My default language. Best fit for the problem wins, but it's usually this.

One language from the edge to the database to the infrastructure code.

Use it when

Lambda, Workers, Web Functions, Pulumi programs, scripts.

Don't use it when

The problem clearly needs another language (data science in Python, for example).

Last reviewed 18 October 2026 by Nicolas Dao

Also in Build and test

Default Claude Code: AI coding agent
Default GitHub: Code hosting
Default OpenAI Codex: Second AI agent
Default Playwright, Vitest, pytest: Testing
Default Stryker mutation testing: Test quality
Skip TypeScript
Never GitLab, Bitbucket and Atlassian

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