SkillHub

web

v1.0.0

Build, debug, and deploy websites with HTML, CSS, JavaScript, modern frameworks, and production best practices.

Sourced from ClawHub, Authored by Iván

Installation

Please help me install the skill `web` from SkillHub official store. npx skills add ivangdavila/web

Quick Reference

Need See
HTML/CSS issues html-css.md
JavaScript patterns javascript.md
React/Next.js/frameworks frameworks.md
Deploy to production deploy.md
Performance/SEO/a11y performance.md

Critical Rules

  1. DOCTYPE matters — Missing <!DOCTYPE html> triggers quirks mode; layouts break unpredictably
  2. CSS specificity beats cascade — .class overrides element selectors regardless of order
  3. === not == — Type coercion causes "0" == false to be true
  4. Async/await in loops — forEach doesn't await; use for...of or Promise.all
  5. CORS is server-side — No client-side fix; configure Access-Control-Allow-Origin on the server
  6. Responsive = viewport meta — Without <meta name="viewport">, mobile renders desktop-width
  7. Form without preventDefault — Page reloads; call e.preventDefault() in submit handler
  8. Images need dimensions — Missing width/height causes layout shift (CLS penalty)
  9. HTTPS or blocked — Mixed content (HTTP resources on HTTPS pages) gets blocked by browsers
  10. Environment variables leak — NEXT_PUBLIC_* exposes to client; never prefix secrets

Common Requests

"Make it responsive" → Mobile-first CSS with media queries; test at 320px, 768px, 1024px "Deploy to production" → See deploy.md for Vercel/Netlify/VPS patterns "Fix CORS error" → Server must send headers; proxy through same-origin if you can't control server "Improve performance" → Lighthouse audit; focus on LCP, CLS, FID; lazy-load below-fold images "Add SEO" → Title/description per page, semantic HTML, OG tags, sitemap.xml

Framework Decision Tree

  • Static content, fast builds → Astro or plain HTML
  • Blog/docs with MDX → Astro or Next.js App Router
  • Interactive app with auth → Next.js or Remix
  • Full SSR/ISR control → Next.js
  • Simple SPA, no SEO needed → Vite + React/Vue