如何Convert Markdown 到 HTML

问题

你有 Markdown 内容和 need 到渲染它 as HTML 开 web page.

前置条件

• Understanding 的 Markdown syntax
• Knowledge 的 HTML

步骤

1. 1. Parse the Markdown

   Use a Markdown parser to convert the text to an HTML AST. The parser handles headings, bold, italic, lists, code blocks, links, images, and tables. Choose a parser that supports the Markdown flavor you are using (CommonMark, GFM, MDX).

   输入

   # Hello\n**bold** text

   输出

   parsed AST

2. 2. Render to HTML

   Serialize the AST to HTML. The output includes appropriate HTML tags: <h1> for headings, <strong> for bold, <ul>/<li> for lists, <pre><code> for code blocks. Ensure the parser handles edge cases like nested lists and reference-style links.

   输入

   # Hello\n**bold**

   输出

   <h1>Hello</h1>\n<p><strong>bold</strong></p>

3. 3. Sanitize the HTML output

   Markdown can contain raw HTML, which is an XSS risk. Pass the output through an HTML sanitizer (like DOMPurify) that allows safe tags and attributes but removes scripts, event handlers, and dangerous URLs. Never render unsanitized Markdown HTML.

   输入

   raw HTML output

   输出

   sanitized, safe HTML

预期结果

安全 HTML 该 renders Markdown 内容无 XSS vulnerabilities.

常见错误

Raw HTML in Markdown causes XSS

Use a Markdown parser that can disable raw HTML, or sanitize the output with an allowlist-based HTML sanitizer.

Markdown flavor not supported

Choose a parser that supports your flavor. GFM adds tables and strikethrough; CommonMark is the standard baseline.

排障指引

• If output looks wrong, check the Markdown flavor and parser options.
• If tables or other GFM features don't render, enable GFM support in the parser.

安全限制

• Always sanitize Markdown-to-HTML output. Raw HTML in Markdown is a common XSS vector.