inikulin/parse5
Parse5
parse5 is a WHATWG HTML parser and serializer for Node.js. It transforms HTML strings into a document object model and converts those trees back into valid HTML strings, following the logic defined by the HTML Living Standard.
The project functions as a streaming HTML processor, using incremental parsing to handle large documents in chunks. It includes an HTML5 compliant tokenizer that uses a state-machine approach to break input into tokens according to official web specifications.
The toolset covers HTML document parsing, serialization, and real-time rewriting via streams. These capabilities allow for programmatic analysis and data extraction from HTML documents while maintaining consistency across different environments.
Features
- XML and HTML Document Parsers - Parses HTML5 content from strings or files into in-memory document trees for traversal and manipulation.
- WHATWG HTML Standard Implementations - Implements the exact parsing and serialization logic defined by the HTML Living Standard for cross-browser consistency.
- Incremental Parsing - Processes large HTML documents in small chunks via incremental parsing to minimize memory consumption.
- HTML - Provides incremental parsing of HTML documents via streams to handle large files without loading the entire source into memory.
- HTML Serialization - Converts structured document object model trees back into valid HTML text strings.
- HTML Tokenization - Implements a state-machine driven tokenizer that converts character streams into HTML tokens according to web specifications.
- State-Based Parsing - Implements state-machine driven parsing to track context and handle incoming characters according to HTML standards.
- DOM Tree Construction - Transforms a sequence of tokens into a hierarchical document object model using specific nesting and stacking rules.
- DOM Serialization - Transforms a structured document object model back into an HTML string for output or storage.
- HTML and XML Serialization - Provides the complete pipeline of parsing HTML into a tree and serializing that tree back into HTML strings.
- HTML String Parsing - Converts HTML strings into a structured tree representation for programmatic analysis of document content.
- HTML Living Standard Compliance - Ensures parsing and serialization behave consistently by following the official WHATWG HTML Living Standard.
- HTML Parsers - Provides a complete toolset for parsing and serializing HTML strings into a document object model following WHATWG standards.
- Large Scale Streaming - Enables parsing and rewriting of massive HTML files using streams to prevent system memory overload.
- HTML Response Rewriting - Modifies HTML content during the streaming process to perform real-time transformations of the document structure.
- Incremental HTML Processing - Processes large HTML documents in chunks to minimize memory usage during analysis and real-time rewriting.
- Parsing Tools - HTML parsing and serialization.
- Parsing Utilities - Spec-compliant HTML parser.
