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Aleksei Aleinikov
Aleksei Aleinikov

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πŸ” Safe String Keys in TypeScript β€” No More Silent Failures

Renaming a field shouldn't break your app after deployment. I built a tiny validatePath() helper that ensures string-based property access is compile-time safe β€” even for nested keys.
βœ… Zero runtime cost
βœ… Works with any object shape
βœ… IDE autocomplete for deep paths

🧠 Learn how template literal types and type recursion can save you hours of debugging:
πŸ‘‰ Read on Medium
https://javascript.plainenglish.io/safe-string-keys-in-2025-my-battle-tested-trick-35a0c9b37902

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