JavaScript Development

Optimized for ECMAScript 2024+, Node.js 22+, TypeScript 5.5+, and modern browser or server-first JavaScript runtimes.

Expert guidance for writing modern JavaScript code with ES2024+ features, async programming patterns, DOM manipulation, API integration, and best practices following official JavaScript resources at https://developer.mozilla.org/en-US/docs/Web/JavaScript.

• Leverage native parallel subagent dispatch and 200k+ context windows where available.

Anti-Patterns

• Copying outdated browser or framework patterns: Deprecated APIs and old workarounds add complexity immediately.
• Skipping abort, timeout, or response checks in async code: Network paths fail at the edges first, not on the happy path.
• Treating accessibility as a final polish pass: Markup and state shape are harder to fix after the component contract is set.

Verification Protocol

Before claiming "skill applied successfully":