JavaScript Snippet

Flatten a Nested Data Object

Difficulty: Medium

Analytics events, form payloads, and config files often arrive as deeply nested objects, but databases, query strings, and CSV exporters want a flat key-value map. This snippet builds a recursive flattener that produces dot-path keys, extends it to handle arrays with bracket notation, and adds the inverse `unflatten` so the round-trip is lossless. Drop it next to your event tracker or form serializer.