Bug Report

🔎 Search Terms

allowSyntheticDefaultImports

🕗 Version & Regression Information

• TypeScript 5.0.2

I could not find this in GitHub but in the locally imported typescript package, getAllowSyntheticDefaultImports is implemented as follows:

function getAllowSyntheticDefaultImports(compilerOptions) {
  if (compilerOptions.allowSyntheticDefaultImports !== void 0) {
    return compilerOptions.allowSyntheticDefaultImports;
  }
  return getESModuleInterop(compilerOptions) || getEmitModuleKind(compilerOptions) === 4 /* System */ || getEmitModuleResolutionKind(compilerOptions) === 100 /* Bundler */;
}

🙁 Actual behavior

https://www.typescriptlang.org/tsconfig#allowSyntheticDefaultImports says that the default value for allowSyntheticDefaultImports is:

true if module is system, or esModuleInterop and module is not es6/es2015 or esnext,,false otherwise.

🙂 Expected behavior

According to the implementation (and the behavior I can observe in my project), the actual default value for allowSyntheticDefaultImports is:

true if module is system, esModuleInterop, or moduleResolution is bundler, false otherwise.