HerbThe modern HTML+ERB Toolchain

An ecosystem of powerful and seamless developer tools for HTML+ERB templates.

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Install in VS Code

GitHub

What's new in v0.9

Herb Playground

Prism Playground

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HTML-aware

Intelligently recognizes and navigates HTML structure within ERB templates, ensuring precise parsing across interleaved markup and Ruby code.

💎

Built on Prism

Powered by Prism, Ruby's new official default parser as of Ruby 3.4. Prism is designed to be error-tolerant and is adopted by major Ruby runtimes including CRuby, JRuby, TruffleRuby.

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Error-Tolerant

Designed to handle errors gracefully, it provides accurate results even when encountering syntax errors.

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Engineered for Speed

Parses input fast enough to update on every keystroke, ensuring real-time responsiveness in text editors and other tools.

📏

Whitespace-Aware

Accurately preserves spacing and formatting in the parse result.

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LSP-Ready

Works seamlessly with Language Server Protocols (LSP) for a better experience in modern editors.

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Precise Position Tracking

Tracks precise locations down to individual character offsets for every node and token, enabling precise debugging, annotations, and diagnostics.

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Works Across Languages

Native bindings for Ruby, Node.js, JavaScript/TypeScript, Java, and Rust.

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Expanding Template Language Support

Future updates will expand beyond ERB through a unified parser and syntax tree architecture that maintains consistent APIs across different templating languages.