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E0267: TypeScript types are not allowed in JavaScript

TypeScript type aliases can be declared with the type keyword. It is a syntax error to write a TypeScript type alias in JavaScript code:

type Response<T> = {
  ok: boolean;
  error?: string;
  data?: T;

To fix this error, rename your file to have a .ts or .tsx suffix.

Alternatively, use JSDoc to declare the type:

 * @typedef {Object} Response
 * @prop {boolean} ok
 * @prop {string} [error]
 * @prop {Object} data

Introduced in quick-lint-js version 2.8.0.

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