Codebase Compiler FAQ

Frequently Asked Questions

How can I find out if a type is number[]?

getElementTypeOfArrayType(t) === numberType

getElementTypeOfArrayType returns undefined if t is not an array type. Use isArrayType or isArrayLikeType if that's all you need to know.

How can I delete nodes in a transformer?

Probably you return undefined instead of a new or existin node, but look at src/compiler/transformers/ts.ts. Deleting type annotations is its main job.