| name | just-html |
| description | Build self-contained, drop-in HTML components (hero, pricing, features, testimonials, footer, etc.) that work inside any existing page without conflicts. Outputs a single code block with scoped CSS, semantic HTML, and minimal JS. |
| user_invocable | true |
Self-Contained HTML Component Builder
Build drop-in HTML sections that work inside any existing page without conflicts. One code block. No dependencies. No collisions.
When to Use This Skill
- Building a standalone section (hero, pricing, features, testimonials, CTA, footer, etc.)
- Creating HTML for paste into WordPress Custom HTML blocks, Bricks code elements, GenerateBlocks containers, or raw PHP templates
- When the component must not interfere with existing page styles or scripts
Step 1: Gather Requirements
Before writing any code, ask the user these questions (skip any already answered):
- What component? — e.g., hero, pricing table, feature grid, testimonial carousel, FAQ accordion, footer
- Namespace prefix — 2-4 letter prefix for all classes and CSS variables (e.g.,
gh, gl, ai). Default: first two letters of brand/project name
- Brand tokens — Ask for CSS variables or hex values for: primary color, secondary color, text color, background color, border color, shadow. If not provided, use sensible defaults and note them
- Content — Headings, body text, CTAs, card content, pricing tiers, testimonial quotes, etc. Ask for specifics based on the component type
- Design reference — Any URL, screenshot, or description of the desired look. If none, build a clean modern default
- Special behavior — Toggles, counters, text cycling, scroll animations, tabs? Default: static with hover states only
Once requirements are clear, proceed to build.
Build Rules
Structure
- Output a single code block containing:
<style>, <section>, and <script> (if needed) in that order
- No
<!DOCTYPE>, <html>, <head>, <body>, or <meta> tags
- No font imports or declarations (the host page handles fonts)
- No CSS resets beyond the component scope
- The
<section> must have a unique class name: [prefix]-[component] (e.g., brand-hero, brand-pricing)
CSS Scoping
- Define ALL design tokens as CSS custom properties on the section's root class, not on
:root
- Prefix every custom property with a short namespace:
--[xx]- (e.g., --gh-primary, --gh-text)
- Prefix every class name with the same short namespace:
[xx]- (e.g., gh-inner, gh-title)
- Use
color-mix() for derived colors (soft backgrounds, hovers, light borders) instead of hardcoded hex values
- Scope the universal box-sizing reset to the component:
.component *, .component *::before, .component *::after { box-sizing: border-box; }
- Never use bare element selectors (h1, p, a, span). Always use prefixed classes
- All keyframe names must be prefixed to avoid collisions (e.g.,
ghFadeUp not fadeUp)
HTML
- Use
<a> tags for CTAs and navigation links, not <button> with onclick
- Use semantic HTML (section, nav, header) where appropriate
- Inline SVG for icons (no icon font dependencies)
- No external image URLs unless the user provides them. Use CSS, SVG, or Unicode for visual elements
JavaScript
- Wrap everything in an IIFE:
(function(){ ... })();
- No global variables or functions
- Use
document.querySelector scoped to component classes
- Keep it minimal: counters, text cycling, scroll triggers. No frameworks
- Omit the
<script> block entirely if the component is purely static
Responsive
- Include breakpoints at 1100px, 768px, and 480px
- Progressively hide less important elements on smaller screens (don't just shrink everything)
- Stack layouts vertically on tablet and below
- Buttons go full-width on mobile
What NOT to Include
- No Google Fonts or font-face declarations
- No normalize.css or reset.css
- No external JS libraries
- No localStorage or sessionStorage
- No fetch calls or API requests
- No comments explaining what CSS properties do (only section separators are fine)
Override Pattern
Because tokens are CSS custom properties on the section class, the user can override from their theme stylesheet without touching the component:
.brand-hero {
--gh-primary: #2563EB;
}
Output Format
Return the complete component as a single fenced code block (```html). No file splitting. No build steps. Copy-paste ready.
