{"library":"fastparse","type":"library","category":null,"description":"The `fastparse` library, currently at version 1.1.2, offers a very simple and efficient state machine-based parser driven entirely by regular expressions. It's designed for lightweight text processing tasks, not complex language parsing, and excels at extracting specific patterns from structured text or simple domain-specific languages. The library's core mechanism involves compiling a user-defined state machine description into optimized regular expressions for each state, leveraging the native JavaScript regex engine for high-performance pattern matching. This approach makes it exceptionally fast for its intended use cases. While its release cadence appears slow, suggesting a stable and mature project rather than one with frequent new feature development, its explicit simplicity is a key differentiator, focusing on minimal overhead and direct regex delegation. This makes it an ideal choice when a full-fledged AST-generating parser is overkill, and targeted extraction of information is the primary goal.","language":"javascript","status":"maintenance","version":"1.1.2","tags":["javascript","parser","regexp"],"last_verified":"Wed May 27","install":[{"cmd":"npm install fastparse","imports":["import Parser from 'fastparse';","const Parser = require('fastparse');","const parser = new Parser(description);"]},{"cmd":"yarn add fastparse","imports":[]},{"cmd":"pnpm add fastparse","imports":[]}],"homepage":null,"github":"https://github.com/webpack/fastparse","docs":null,"changelog":null,"pypi":null,"npm":"https://www.npmjs.com/package/fastparse","openapi_spec":null,"status_page":null,"smithery":null,"compatibility":{"summary":{"python_range":"18–22","success_rate":0,"avg_install_s":null,"avg_import_s":null,"wheel_type":null},"url":"https://checklist.day/v1/registry/fastparse/compatibility"}}