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frontend-security-coder

Enforce XSS and injection defenses for React, TypeScript, and JavaScript UI code.

70|42|Updated Mar 27, 2026
Search Tags:#sanitization#clickjacking#session-management#frontend-security#content-security-policy#xss-prevention#dom-manipulation
One-click install
npx skills add https://github.com/tranhieutt/software_development_department --skill frontend-security-coder-tranhieutt
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: frontend-security-coder
Source: https://github.com/tranhieutt/software_development_department/tree/main/.claude/skills/frontend-security-coder
Command: npx skills add https://github.com/tranhieutt/software_development_department --skill frontend-security-coder-tranhieutt

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Prevents insecure frontend practices from introducing client-side vulnerabilities such as XSS, unsafe DOM updates, and weak CSP configurations by codifying expert security guidance.

Core Features & Use Cases

  • Safe DOM manipulation: Replaces innerHTML and other unsafe sinks with textContent, secure element creation, and Trusted Types-aware patterns.
  • CSP and browser policy guidance: Helps configure nonce/hash-based CSP directives, inline script elimination, and trusted policies to block injection.
  • Input validation and navigation security: Validates and sanitizes user input, secures redirects, and enforces clickjacking protections for rich interfaces.
  • Use Case: Harden a React TypeScript SPA by sanitizing user comments, configuring CSP/reporting, validating redirect targets, and adding clickjacking defenses before launch.

Quick Start

Ask the skill to review the UI and replace insecure DOM writes with sanitized text handling wherever user data appears.

Frequently Asked Questions about frontend-security-coder

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I prevent XSS vulnerabilities when manipulating the DOM in a React TypeScript application?▼

This approach enforces secure DOM manipulation by replacing innerHTML with textContent and Trusted Types-aware patterns, preventing XSS vulnerabilities. It applies safe element creation to block client-side injection attacks.

What is the best way to configure Content Security Policy directives to block client-side injection?▼

Configuring Content Security Policy to block injection requires nonce or hash-based CSP directives, inline script elimination, and trusted policy enforcement. This stops unauthorized script execution and protects the frontend interface.

How do I add clickjacking protections and secure redirect handling for a single page application?▼

Adding clickjacking protections and secure redirect handling involves validating user input, securing navigation targets, and enforcing frame-breaking safeguards. This prevents UI redressing and open redirect vulnerabilities in rich interfaces.

Does this frontend security approach work without external dependencies?▼

Yes, this frontend security approach works without external dependencies. It codifies expert security guidance directly into React, TypeScript, or JavaScript UI work streams to enforce secure DOM manipulation and input validation natively.

How do I sanitize user input and validate navigation targets before launching a frontend interface?▼

Sanitizing user input and validating navigation targets requires applying strict sanitization rules and securing redirect targets before launch. This ensures session safeguards and trusted browser feature configurations meet compliance.

Why should I replace innerHTML with textContent for safe DOM updates?▼

Replacing innerHTML with textContent for safe DOM updates prevents the browser from parsing injected HTML strings. This neutralizes cross-site scripting attempts by treating user input strictly as plain text data.

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