Filter JS From HTML FAQs

Question 1

When should I use this Claude Code skill?

Accepted Answer

Use this skill when building web applications that process user-generated content, developing security tools, or cleaning legacy HTML files where maintaining the exact original visual structure and formatting is critical for the application's integrity.

Question 2

What does the Filter JS From HTML skill do?

Accepted Answer

This skill equips Claude with specialized logic to identify and remove executable JavaScript—such as script tags, event handlers, and dangerous URL schemes—from HTML documents while ensuring the layout, whitespace, and entity encoding remain untouched.

Question 3

How does this skill improve my security workflow?

Accepted Answer

It implements a defense-in-depth strategy by recognizing obscure XSS vectors that simple regex filters miss. It provides a comprehensive verification checklist to test your code against bypass techniques like case variations and malformed HTML.

Question 4

Why is format preservation a key feature of this skill?

Accepted Answer

Standard HTML sanitizers often 're-pretty' or alter the whitespace and quote styles of the original document. This skill provides techniques to remove threats while strictly maintaining original formatting, which is essential for version control and layout consistency.

Question 5

What Python tools are recommended for this skill?

Accepted Answer

The skill provides specific guidance on configuring Python-based parsers like BeautifulSoup, lxml, and html.parser. It focuses on critical configurations, such as disabling character reference conversion, to ensure the output remains byte-compatible with the source.

Filter JS From HTML

Filter JS From HTML

Key Features

Use Cases

Key Features

Use Cases