# How to use Jest mocks

DevFeed: [How to use Jest mocks](<https://devfeed.tech/articles/how-to-use-jest-mocks-38398.md>)

Original publisher: [Read original article](<https://blog.danlew.net/2026/05/28/how-to-use-jest-mocks/>)

Author: Dan Lew

Published: 2026-05-28T13:10:16Z

Content type: tutorial

Language: en

Sources: [Dan Lew Blog](<https://devfeed.tech/sources/dan-lew-blog.md>)

Topics: [Jest](<https://devfeed.tech/topics/jest.md>), [Mocking](<https://devfeed.tech/topics/mocking.md>), [JavaScript](<https://devfeed.tech/topics/javascript.md>), [Dependency injection](<https://devfeed.tech/topics/dependency-injection.md>)

Tags: [dependency-injection](<https://devfeed.tech/tags/dependency-injection.md>), [how-to](<https://devfeed.tech/tags/how-to.md>), [javascript](<https://devfeed.tech/tags/javascript.md>), [jest](<https://devfeed.tech/tags/jest.md>), [mocking](<https://devfeed.tech/tags/mocking.md>), [testing](<https://devfeed.tech/tags/testing.md>)

## AI overview

A practical introduction to Jest mocks covering module mocking, mock hoisting, automock behavior, and configuring mocked return values. It also notes limitations in the documentation and discusses considerations for TypeScript users.

## Source excerpt

For better or worse, my life has become infested by Jest mocks. I come from the land of dependency injection (I even gave a talk once!), but whenever I talk about dependency injection to JavaScript developers I get this reaction: Instead, mocking is king. Unfortunately, I've found Jests&