js-yaml is a YAML 1.2 parser and serializer written in pure JavaScript. It provides robust and reliable YAML parsing and generation capabilities for Node.js and browsers. The package supports custom types, schema definitions, and safe loading options, making it versatile for various use cases. Its clean API and extensive test suite ensure ease of use and stability across projects. js-yaml is widely adopted for configuration files, data serialization, and other applications requiring YAML processing.