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Most TypeScript codebases treat PropertyKey and string | number | symbol as interchangeable. The subtle semantic difference breaks type inference in Proxy handlers, Reflect operations, and generic object utilities.

Master tagged template literals and TemplateStringsArray to build type-safe domain-specific languages in TypeScript. Learn production patterns for HTML sanitization, SQL builders, and internationalization.

Node.js 24 ships with native SQLite support. Understand when the built-in node:sqlite module can replace better-sqlite3 in production scripts and edge workers, and when the native module still wins.