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html5rw-jsoo

v1.0.0

Published

Pure OCaml HTML5 parser and validator compiled to JavaScript/WebAssembly via js_of_ocaml

Vulnerabilities

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Links

Git

Maintainers

avsmavsm

Keywords

ocamlhtml5parserjs_of_ocamlwasmwebassemblyvalidatorwhatwg

Readme

html5rw

Pure OCaml HTML5 parser compiled to JavaScript and WebAssembly via js_of_ocaml.

Note: This package is browser-only. It uses DOM APIs and browser events for initialization and cannot be used in Node.js.

This is a fully compliant HTML5 parser implementing the WHATWG HTML5 specification, passing the html5lib-tests conformance suite. It is based on transpiling https://github.com/validator/validator into OCaml.

Installation

npm install html5rw-jsoo

Usage (Browser Only)

JavaScript Version

<!DOCTYPE html>
<html>
<head>
  <script src="node_modules/html5rw/htmlrw.js"></script>
</head>
<body>
  <script>
    // The library initializes on DOMContentLoaded
    // API documentation coming soon
  </script>
</body>
</html>

WebAssembly Version

<!DOCTYPE html>
<html>
<head>
  <script src="node_modules/html5rw/htmlrw.wasm.js"></script>
</head>
<body>
  <script>
    // Same API as JavaScript version, but runs as WASM
    // Automatically loads WASM modules from htmlrw_js_main.bc.wasm.assets/
  </script>
</body>
</html>

Web Worker (Background Validation)

For non-blocking HTML validation in a separate thread:

const worker = new Worker('node_modules/html5rw/htmlrw-worker.js');

worker.onmessage = (e) => {
  console.log('Validation result:', e.data);
};

worker.postMessage({ html: '<div><p>Hello' });

WASM version:

const worker = new Worker('node_modules/html5rw/htmlrw-worker.wasm.js');

Files Included

| File | Description | |------|-------------| | htmlrw.js | Main library (JavaScript) | | htmlrw.wasm.js | Main library (WebAssembly loader) | | htmlrw-worker.js | Web Worker (JavaScript) | | htmlrw-worker.wasm.js | Web Worker (WebAssembly loader) | | htmlrw-tests.js | Browser test runner (JavaScript) | | htmlrw-tests.wasm.js | Browser test runner (WebAssembly loader) | | htmlrw_js_main.bc.wasm.assets/ | WASM modules for main library | | htmlrw_js_worker.bc.wasm.assets/ | WASM modules for web worker | | htmlrw_js_tests_main.bc.wasm.assets/ | WASM modules for test runner |

Features

  • Full HTML5 parsing per WHATWG specification
  • Encoding detection and conversion
  • Error recovery (like browsers)
  • CSS selector queries
  • DOM manipulation
  • HTML serialization

Source Code

The OCaml source code is available on the main branch: https://tangled.org/anil.recoil.org/ocaml-html5rw

License

MIT