Next-generation HTML+ERB parsing for smarter developer tooling and more.
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HTML-aware
Intelligently recognizes and navigates HTML structure within ERB templates, ensuring precise parsing across interleaved markup and Ruby code.
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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.
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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, JavaScript/TypeScript, and other high-level programming languages.
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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.
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