This document describes that are not a bug. If you file an issue that is described in this issue, the issue will be closed without any additional information.

Class fields are undefined

• Inconsistent useDefineForClassFields behavior #6985
• https://swc.rs/docs/migrating-from-tsc#usedefineforclassfields

jest.mock of ESM fails / Cannot modify ES modules.

• jest.mock of ESM should fail, and it's correct #5205

Evaluation order of module: "commonjs" is different from tsc.

The behavior of tsc is wrong. ESM is an established standard, and the specification explicitly says that ESM imports are hoisted.

• Compiler allows for using a value before it is imported microsoft/TypeScript#16166

Cyclic imports of ESM do not work (as what you want)

ESM is an established standard, and as SWC is a compiler, SWC always follows specifications.

I can't import CJS Modules from node.js ESM.

• Two named exports creates invalid CommonJS #7665 (comment)

TDZ semantics is broken

• ES5 target breaks TDZ semantics: missing ReferenceError for let access before initialization #11045 (comment)