Creedengo-JS is an eco-responsibility static code analyzer for JavaScript/TypeScript projects that identifies code patterns with negative environmental impact, such as energy overconsumption and "fatware". It provides both a SonarQube plugin and standalone ESLint plugin to help developers optimize web applications and server-side code for reduced environmental footprint. The tool supports multiple frameworks including React, NestJS, and React Native, making it suitable for environmentally-conscious developers and teams looking to minimize their software's ecological impact.