marcoroth/herb

HTML+ERB (HTML + Embedded Ruby)

Powerful and seamless HTML-aware ERB parsing and tooling.

Herb is an ecosystem of developer tooling built specifically around HTML+ERB (.html.erb) files. It is designed to simplify and enhance the experience of working with HTML+ERB templates through precise, accurate tooling.

At the core of Herb is the Herb Parser, a fast, portable, and HTML-aware ERB parser written in C. The parser generates a detailed, accurate syntax tree that serves as the foundation for reliable code analysis, transformations, and developer tooling.

The Herb ecosystem includes developer tools (CLI, language server, formatter, linter), language bindings (for Ruby, Node.js, and the Browser using WebAssembly), and utility libraries (language service, highlighter, minifier, printer). All these components leverage the Herb Parser's syntax tree to provide consistent, accurate, and helpful tooling experiences.

Herb provides a complete ecosystem of HTML+ERB tooling, designed to simplify and enhance your daily workflow. Built on the Herb Parser, it offers multiple tools that integrate seamlessly into editors, developer environments, and CI pipelines:

You can use Herb programmatically in Ruby, as well as in JavaScript via Node.js, WebAssembly, or directly in browsers.

For a complete overview of all available tools, libraries, and integrations, visit the Projects page on our documentation site.