25 JSON Mistakes Every Developer Makes

Short summary

JSON enforces strict syntax rules unlike JavaScript objects: all keys and strings require double quotes, trailing commas are forbidden, and special types like Date and undefined need careful handling. Watch for unescaped quotes, circular references, and BigInt precision loss. Always use JSON.parse() with try-catch to prevent crashes.

• •JSON forbids single quotes, trailing commas, unquoted keys—syntax must be perfect or it fails to parse
• •Data types like Date, NaN, and large integers require special handling or conversion to strings to preserve values
• •Wrap JSON.parse() in try-catch and never use eval() to avoid crashes and security vulnerabilities

Generated with AI, which can make mistakes.