This transformation is expensive, so we only want to do it once.

The relative path from the original parent directory to the configured "outbase" directory, or to the lowest common ancestor directory.

The original extension of the file, or the name of the output file (e.g.

The CommonJS format looks like this: ..

The ES module format looks like this: ..

IIFE stands for immediately-invoked function expression.

This is used when not bundling.

A hash of the contents of this file, and the contents and output paths of all dependencies (except for their hash placeholders).

Used with ".mts" and ".cts".

The original name of the file, or the manual chunk name, or the name of the type of output file ("entry" or "chunk" or "asset").

"useDefineForClassFields" defaults to true.

"useDefineForClassFields" defaults to false.

"importsNotUsedAsValues" != "remove".

"preserveValueImports" == true.

We currently only support compile-time replacement with certain expressions: - Primitive literals - Identifiers - "Entity names" which are identifiers followed by property accesses We don't support arbitrary expressions because arbitrary expressions may require the full AST.

Note: This can currently only contain primitive values.

These flags represent the following separate "tsconfig.json" settings: - importsNotUsedAsValues - preserveValueImports - verbatimModuleSyntax TypeScript prefers for people to use "verbatimModuleSyntax" and has deprecated the other two settings, but we must still support them.