JavaScript's Array.flat() Is Elegant. But Your Nested Data Might Need Something Meaner.

⚡ Key Takeaways

• Array.flat() is clean and modern, but only works in ES2019+ browsers—legacy environments need alternatives 𝕏
• Recursion is intuitive but crashes on deeply nested arrays due to call stack limits 𝕏
• Stack-based iteration handles arbitrary nesting depth without overhead and is often fastest for large datasets 𝕏