Wie in Konvertieren Markdown in HTML

问题

You haben Markdown content und brauchen in rendern it als HTML auf ein Web Seite.

Voraussetzungen

• Understanding of Markdown syntax
• Knowledge of HTML

Schritte

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).

   Eingabe

   # 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.

   Eingabe

   # 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.

   Eingabe

   raw HTML output

   输出

   sanitized, safe HTML

Erwartetes Ergebnis

Sicher HTML das renders der Markdown content ohne XSS vulnerabilities.

Häufige Fehler

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.

Troubleshooting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.

Sicherheitsgrenzen

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