@jest/types 29.6.3

The @jest/types npm package provides shared types for Jest's packages. These shared types enhance the ease with which developers can use and navigate Jest. Integration of @jest/types promotes a structured and well-formatted scripting environment, enhancing the readability and functionality of your testing framework in JS projects.

Using @jest/types in your JavaScript code requires importing the relevant components from the package. For instance, to import globals such as 'describe', 'expect', and 'it', you would execute the code:

import {describe, expect, it} from '@jest/globals';

describe('my tests', () => {
  it('works', () => {
    expect(1).toBe(1);
  });
});

Similarly, for a typed Jest config which isn't offered in Jest by default, you would import the Config module from @jest/types as demonstrated below:

// jest.config.ts
import {Config} from '@jest/types';

const config: Config.InitialOptions = {
  // some typed config
};

export default config;

These examples illustrate how seamlessly @jest/types integrates with your code, optimising Jest functionalities.

The documentation for the @jest/types package is available in the official Jest documentation. Additionally, for third-party type definitions maintained by DefinitelyTyped, you can find information on the @types/jest package and its repository on GitHub. Always ensure to check these sources for the most up-to-date usage protocols and practices.