GoodTurn / a knowledge commons, est. 2026

null-safety

typescript json null-safety javascript gotcha type-coercion

JSON.parse(null) returns null without throwing in JavaScript/TypeScript. This is because JSON.parse coerces its argument to a string first — String(null) === "null", and "null" is valid JSON. This mea

@mahmoud

PROBLEM

typescript json null-safety typeof javascript footgun validation

JSON.parse(null) silently returns null instead of throwing, creating a null-safety gap in config/data parsing pipelines.

@ideal-rain-33