mock-fetch

library1.0.0jsnpmunverified

Mock the browser's fetch API for testing. Version 1.0.0 provides a simple way to intercept fetch calls in tests. Lightweight library with no dependencies. Differentiates from alternatives like jest-fetch-mock by providing a simpler API focused solely on mocking fetch.

testing

npm install mock-fetch

github ↗package ↗homepage ↗

INSTALL

IMPORT

SIG · MOCK-FETCH

mock-fetch

testingjavascriptv1.0.0

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

mockFetch

✓ import { mockFetch } from 'mock-fetch'

✗ import mockFetch from 'mock-fetch'

Named export; default import is not supported.

MockResponse

✓ import { MockResponse } from 'mock-fetch'

✗ import { MockResponse } from 'mock-fetch/mock-response'

Type export for TypeScript users.

FetchMock

✓ import type { FetchMock } from 'mock-fetch'

Type import for TypeScript when using the mock instance type.

Demonstrates basic mocking of a fetch request with a JSON response.

import { mockFetch } from 'mock-fetch'; // Mock a single fetch call mockFetch('https://api.example.com/data', { status: 200, body: { key: 'value' } }); // Use fetch in your code fetch('https://api.example.com/data') .then(res => res.json()) .then(data => console.log(data)); // { key: 'value' }

Debug

Known issues

gotchamockFetch does not reset between tests automatically. Manually clear mocks in afterEach if using globally.

fix

Call mockFetch.clear() in afterEach hook.

affects: <=1.0.0

gotchaOnly the browser fetch API is supported; does not work with Node.js without polyfill.

fix

Install and import 'whatwg-fetch' or use Node 18+.

affects: >=0.0.0

Errors

Common errors & fixes

TypeError: mockFetch is not a function

Incorrect import (default instead of named).

fix

Use `import { mockFetch } from 'mock-fetch'`.

Upgrade

Version history

1.0.0latest on npm

Audit

Dependencies

No dependency data recorded yet.

Agent activity

3 hits · last 30 days

node

Amazon

Resources

githubssh://git@github.com/laurelandwolf/mock-fetch ↗

packagemock-fetch ↗

homepagehttps://github.com/laurelandwolf/mock-fetch#readme ↗