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What is jest-babel-issue?

gaearon/jest-babel-issue — explained in plain English

Analysis updated 2026-07-17 · repo last pushed 2017-03-08

★ 1HTMLAudience · developerComplexity · 2/5DormantSetup · moderate

In one sentence

A minimal bug-report repo reproducing a Jest/Babel error where the spread operator syntax isn't recognized in tests.

Mindmap

mindmap
  root((repo))
    What it does
      Reproduces a bug
      Jest test failure
      Spread operator error
    Tech stack
      Jest
      Babel
      React
      Docker
    Use cases
      Confirm known issue
      Help maintainers debug
      Reproduce consistently
    Audience
      React developers
      Tool maintainers

Code map

Detail Auto

An interactive map of this repo's files and how they connect — its source is parsed live in your browser. Click Visualize to build it.

filefunction / class

What do people build with it?

USE CASE 1

Reproduce a Jest/Babel spread-operator error consistently across operating systems using Docker.

USE CASE 2

Confirm whether a similar error in your own project is a known Jest/Babel issue.

USE CASE 3

Give Jest or Babel maintainers a minimal example to debug the syntax transpilation failure.

What is it built with?

JestBabelReactDocker

How does it compare?

gaearon/jest-babel-issueatypical-chai/motion-graphics-from-css-hyperframesbritecharts/britecharts-test-project
Stars111
LanguageHTMLHTMLHTML
Last pushed2017-03-08—2023-12-15
MaintenanceDormant—Dormant
Setup difficultymoderatehardmoderate
Complexity2/53/52/5
Audiencedevelopergeneraldeveloper

Figures from each repo's GitHub metadata at analysis time.

How do you get it running?

Difficulty · moderate Time to first run · 30min

Requires Docker to reproduce the exact bug environment.

Copy-paste prompts

Prompt 1
Run the Docker commands in this repo and explain what causes the spread operator error in Jest.
Prompt 2
Compare the react-scripts test error with the direct Jest error and explain why they differ.
Prompt 3
Help me check if my project's Jest/Babel config has the same spread operator issue as this repo.

Frequently asked questions

What is jest-babel-issue?

A minimal bug-report repo reproducing a Jest/Babel error where the spread operator syntax isn't recognized in tests.

What language is jest-babel-issue written in?

Mainly HTML. The stack also includes Jest, Babel, React.

Is jest-babel-issue actively maintained?

Dormant — no commits in 2+ years (last push 2017-03-08).

How hard is jest-babel-issue to set up?

Setup difficulty is rated moderate, with roughly 30min to a first successful run.

Who is jest-babel-issue for?

Mainly developer.

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