AngleSharp – a standards‑compliant HTML parser for .NET

说明与用途

AngleSharp 是一个 .NET 库，实现了 DOM 规范，能够在无浏览器环境下解析 HTML、SVG、MathML、CSS 和 XML。它从一个个人实验成长为广泛使用的组件，下载量超过 5 亿次，应用于清理、测试和渲染等场景。

问题

Developers needed a reliable, spec‑conformant HTML/CSS/JS parser in C# that could be used for scraping, testing, rendering, and sanitization without writing regexes.

结果

AngleSharp grew from a side project into a widely adopted .NET foundation project with over 500 million installs, powering sanitization, testing, email rendering, and many commercial applications.

工作流

• 1. Implement a pure C# HTML5 parser from the spec.
• 2. Add CSS engine and optional JavaScript engine via modular extensions.
• 3. Expose a BrowsingContext API that mimics a browser tab.
• 4. Publish as NuGet packages and open‑source on GitHub.
• 5. Engage community for bug fixes, API improvements, and feature requests.
• 6. Integrate into downstream projects (HtmlSanitizer, bUnit, PreMailer.Net, etc.).

证据

AngleSharp is a .NET library that parses HTML, SVG, MathML, CSS, and (to a good extent) XML, and gives you back a fully-featured, spec-conformant DOM.

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The repository already had 120+ stars, and the article was ranking surprisingly well.

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AngleSharp 0.10 laid the groundwork for modularity, allowing extensions like CSS and JS to be added as separate libraries.

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The core NuGet package alone sits at over 310 million downloads.

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HtmlSanitizer uses AngleSharp to parse and re‑render HTML while stripping out anything that could be used for cross‑site scripting.

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