quick-lint-js

Find bugs in JavaScript programs.

E0278: TypeScript type exports are not allowed in JavaScript

TypeScript supports exporting types using export type. It is a syntax error to write export type in JavaScript code:

// Warning: Do not instantiate directly.
// Use makeBanana instead.
class Banana {
}
// Don't allow instantiating Bananas directly.
export type {Banana};

/** @returns {Banana} */
export function makeBanana() {
  return new Banana();
}

To fix this error, export the variable normally by removing the type keyword:

// Warning: Do not instantiate directly.
// Use makeBanana instead.
class Banana {
}
export {Banana};

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