Type inference explained

Understand JSON-to-TypeScript inference

Short guides explain what one sample can reveal, how object arrays merge and when to choose each declaration style.

Inference6 min read

What one JSON sample cannot tell TypeScript

Understand absent fields, empty arrays, null and runtime validation before using inferred declarations.

Arrays6 min read

See how deterministic key merging represents fields absent from some observed objects.

TypeScript6 min read

Choose a declaration style deliberately while keeping the inferred property contract identical.