Source: https://seerepo.com/r/jestjs/jest
Markdown source: https://seerepo.com/r/jestjs/jest.md
Description: jestjs/jest is a TypeScript repo with 195,068 lines written. jest is built with React and react.

# What's inside jestjs/jest

jestjs/jest is a TypeScript repo with 195,068 lines written. jest is built with React and react.

Its description on GitHub: “Delightful JavaScript Testing.”

TypeScript · MIT · 45,474 stars · GitHub: https://github.com/jestjs/jest

Read on November 10, 2026, at commit 7261444.

## More on this repo

- [What is jest built with?](https://seerepo.com/r/jestjs/jest/built): jest is built with React and react.
- [How much of jest did AI write?](https://seerepo.com/r/jestjs/jest/ai): No AI tool signed any of the 7,528 commits of jest.

## In figures

- 195,068 lines written: The ones people and agents wrote: product, tests, schemas and tooling. Generated code doesn’t count.
- 413 product files: The product’s own files. Test files are counted apart.
- 1,729 test files: The files that test the code.
- 4 technologies: Each service with the file and line that prove it.

SeeRepo read the facts in its code and kept none of it. AI only helps sort its packages and folders by their names, and never sees its code.

## Frequently asked questions

### What is jestjs/jest?

jestjs/jest is a TypeScript repo with 195,068 lines written. Its description on GitHub: “Delightful JavaScript Testing.”

The proof: [its page on GitHub](https://github.com/jestjs/jest)

### What is jest built with?

jest is built with React and react.

The proof: [each service with its file and line](https://seerepo.com/r/jestjs/jest/built)

### What license does jest have?

jest is released under the MIT license.

The proof: [its page on GitHub](https://github.com/jestjs/jest)

### How many stars does jest have on GitHub?

jest had 45,474 stars on GitHub on November 10, 2026.

The proof: [its page on GitHub](https://github.com/jestjs/jest)

## Add this badge to your README

It links to this page and updates itself each time SeeRepo reads the repo.

```markdown
[![jestjs/jest on SeeRepo](https://seerepo.com/badge/jestjs/jest.svg)](https://seerepo.com/r/jestjs/jest?de=insignia)
```

## What is your repo built with?

Any public repo, with no account: https://seerepo.com/r/owner/repo/built, with the owner and name it has on GitHub.