duo001/evil.js

Health v2 · maintenance only

Flags: no_releases no_license

Adoption not part of the score

2548 stars · 627 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Evil.js is a JavaScript prank library that, when imported into a project, subtly sabotages built-in behavior: Array.includes lies on certain array lengths, Array.map drops elements on Sundays, setTimeout runs a second late, JSON.stringify swaps characters, and more. It is intended as a joke 'parting gift' to leave in a project, not a legitimate utility.

Use cases

• prank a coworker's codebase before leaving a job
• demonstrate how supply-chain attacks can subtly break JavaScript apps
• teach lessons about trusting third-party dependencies
• add hidden misbehavior to a project as a joke

When to choose

• you want a novelty prank library to inject subtle bugs into a JavaScript project
• you need a real-world example of malicious dependency behavior for security training

When to avoid

• any real, production, or team project - it deliberately corrupts runtime behavior
• you need reliable standard library semantics
• your organization has security or code-review policies, since this is effectively a trojan dependency

Facets

library · maturity maintenance

developer-tools security developer-tools programming-languages browser prank joke sabotage evil trojan novelty nodejs javascript

Member repositories

For agents

markdown · JSON · MCP: product_card(name="duo001/evil.js")