Parse JSON safely with error handling

JSON.parse() on invalid input throws a SyntaxError that will crash your application if uncaught. API responses, localStorage values, and user-provided data can all be malformed. Safe parsing with validation catches these errors at the point of parsing, not deep in your application logic when a missing property causes an unexpected error.

Quick Reference

• JSON.parse() throws a SyntaxError on invalid input — always use try/catch
• Validate the shape of parsed data before accessing its properties
• JSON.stringify() can return undefined for values that can't be serialized
• Use a type-safe parser (Zod, Valibot) for data from external sources

Check

Find all JSON.parse() calls in this file and check whether each one is wrapped in try/catch and whether the result is validated before use.

Fix

Add try/catch error handling to all JSON.parse() calls and add shape validation to protect against unexpected data structures.