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README.md

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-# 💧 MistCSS
+# MistCSS
 
-[![Node.js CI](https://github.com/typicode/mistcss/actions/workflows/node.js.yml/badge.svg)](https://github.com/typicode/mistcss/actions/workflows/node.js.yml)
+> Simplicity is the ultimate sophistication
 
-> Create components with 50% less code
+MistCSS lets you create reusable visual components without JavaScript or TypeScript (_think about it for a second... no JS/TS needed_).
 
-MistCSS is a new, better and faster way to write visual components. ~~CSS-in-JS~~? Nope! JS-from-CSS 👍
+Leverage native HTML and CSS, get type safety and auto completion. Just clean and efficient styling.
 
-All major frameworks are supported.
+<img width="1116" alt="Screenshot 2024-11-01 at 03 47 44" src="https://github.com/user-attachments/assets/74aea071-be00-4d03-b43a-e46d6282e4b5">
 
-## 1. Write your component in CSS only
+_What you see above is standard HTML ([data-attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Global_attributes/data-*)) and CSS ([nested CSS](https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_nesting/Using_CSS_nesting)). MistCSS simply creates a `d.ts` file based on your CSS._
 
-`./src/Button.mist.css`
+## Features
+
+- 🥶 Below zero-runtime, it's zero JavaScript. Smaller bundles and faster code.
+- 💎 What you write is what you get. No transformations, easy debugging.
+- 🎒 Standards-based, reusable styles across frameworks, compatible with Tailwind or any CSS framework
+- ⚡️ Instantly productive, no learning curve, simple onboarding.
+- 💖 Back to basics with a modern twist: access the full power of HTML and CSS, enhanced with type safety and code completion (without the complexity).
+
+## Usage
+
+Traditional approaches require wrapping your markup/styles in JavaScript functions (`Button.tsx` → `<button/>`, `Input.tsx` → `<input/>`, ...), defining props with TypeScript types, and writing logic to manage class names.
+
+With MistCSS, styling is straightforward and minimal. Here’s how it looks:
+
+`mist.css`
 
 ```css
-@scope (button.custom-button) {
-  :scope {
-    background: black;
+button {
+  border-radius: 1rem;
+  padding: 1rem;
+  background: lightgray;
+
+  &[data-variant='primary'] {
+    background-color: black;
     color: white;
+  }
+
+  &[data-variant='secondary'] {
+    background-color: grey;
+    color: white;
+  }
+}
+```
 
-    /* 👇 Define component's props directly in your CSS */
-    &[data-variant='primary'] {
-      background: blue;
-    }
+`Page.tsx`
 
-    &[data-variant='secondary'] {
-      background: gray;
-    }
+```jsx
+<>
+  <button data-variant="primary">Save</button>
+  <button data-variant="tertiary">Save</button> {/* TS error, tertiary isn't valid */}
+</>
+```
+
+Output
+
+```jsx
+<button data-variant="primary">Save</button> {/* Same as in Page.tsx */} 
+```
+
+_This example demonstrates enums, but MistCSS also supports boolean and string props. For more details, see the FAQ._
+
+## How does it work?
+
+MistCSS parses your `mist.css` file and generates `mist.d.ts` for type safety.
+
+For instance, here’s the generated `mist.d.ts` for our button component:
+
+```typescript
+interface Mist_button extends React.DetailedHTMLProps<React.HTMLAttributes<HTMLButtonElement>, HTMLButtonElement> {
+  'data-variant'?: 'primary' | 'secondary'
+}
+
+declare namespace JSX {
+  interface IntrinsicElements {
+    button: Mist_button // ← <button/> is extended at JSX level to allow 'primary' and 'secondary' values
   }
 }
 ```
 
-## 2. Run MistCSS codegen
+That’s it! Simple yet powerful, built entirely on browser standards and TypeScript/JSX.
+
+## Install
+
+```sh
+npm install mistcss --save-dev
+```
+
+`postcss.config.js`
+
+```js
+module.exports = {
+  plugins: {
+    mistcss: {},
+  },
+}
+```
+
+`layout.tsx`
 
-```shell
-mistcss ./src --target=react --watch
-# It will create ./src/Button.mist.tsx
+```ts
+import './mist.css'
 ```
 
-## 3. Get a type-safe component without writing TypeScript
+## FAQ
+
+### Can I use CSS frameworks like Tailwind or Open Props?
+
+Absolutely, MistCSS is pure HTML and CSS, generating only `mist.d.ts`, so there are no limitations. You can integrate any CSS framework seamlessly. Here are a few examples to get you started:
+
+#### Tailwind v3 ([@apply](https://tailwindcss.com/docs/functions-and-directives#apply))
+
+```css
+button {
+  @apply bg-blue-500 text-white;
+  /* ... */
+}
+```
+
+#### Tailwind v3 ([theme](https://tailwindcss.com/docs/functions-and-directives#theme))
+
+```css
+button {
+  background: theme(colors.blue.500);
+  /* ... */
+}
+```
+
+#### Tailwind v4
+
+Tailwind v4 will support CSS variables natively (see [blog post](https://tailwindcss.com/blog/tailwindcss-v4-alpha
+)).
 
-`./src/App.tsx`
+#### Tailwind (inline style)
+
+To override some styles, you can use `className`
+
+```jsx
+<button data-variant="primary" className="p-12">
+  Save
+</button>
+```
+
+#### Open Props
+
+```css
+button {
+  background-color: var(--blue-6);
+  /* ... */
+}
+```
+
+### Can I do X without JavaScript?
+
+CSS is more powerful than ever, before reaching for JS, explore if native CSS features can accomplish what you need.
+
+### How to write enum, boolean, string props and conditions?
+
+```css
+div[data-component='section']
+  /* CSS variables */
+  --color: ...;
+
+  /* Default styles */
+  background: var(--color, green);
+  margin: ...;
+  padding: ...;
+
+  /* Enum props */
+  &[data-size="sm"] { ... }
+  &[data-size="lg"] { ... }
+
+  /* Boolean props */
+  &[data-is-active] { ... }  
+
+  /* Condition: size="lg" && is-active */
+  &[data-size="lg"]&[data-is-active] { ... }
+
+  /* Condition: size="lg" && !is-active */
+  &[data-size="lg"]:not([data-is-active]) { ... }
+}
+```
+
+```jsx
+<div
+  data-component="section"
+  data-size="foo"
+  data-is-active
+  style={{ '--color': 'red' }}
+/>
+```
+
+### How to re-use the same tag
+
+If you want both basic links and button-styled links, here’s how you can do:
+
+```css
+a { /* ... */ }
+
+a[data-component='button'] { /* ... */
+  &[data-variant='primary'] { /* ... */ }
+}
+```
 
 ```jsx
-import { CustomButton } from './Button.mist'
+<>
+  <a href="/home">Home</a>
+  <a href="/home" data-component="button">Home</a>
+  <a href="/home" data-component="button" data-variant="primary">Home</a>
+  <a href="/home" data-variant="primary">Home</a> {/* TS error, `data-variant` is only valid with `data-component="button"` */}
+</>
+```
+
+> [!NOTE]
+> `data-component` is just a naming convention. Feel free to use any attribute, like `data-style='button'` or `data-button`. It’s simply a way to differentiate between components using the same tag.
+
+
+### How to build complex components?
 
-export const App = () => (
-  <>
-    <CustomButton variant="primary">Save</CustomButton>
+`mist.css`
 
-    {/* TypeScript will catch the error */}
-    <CustomButton variant="tertiary">Cancel</CustomButton>
-  </>
-)
+```css
+article[data-component='card'] { /* ... */ }
+div[data-component='card-title'] { /* ... */ }
+div[data-component='card-content'] { /* ... */ }
+```
+
+`Card.jsx`
+
+```jsx
+export function Card({ title, children }) {
+  return (
+    <article data-component="card">
+      <div data-component="card-title">{title}</div>
+      <div data-component="card-content">{children}</div>
+    </article>
+  )
+}
 ```
 
-MistCSS can generate ⚛️ **React**, 💚 **Vue**, 🚀 **Astro**, 🧠**Svelte** and 🔥 **Hono** components. You can use 🍃 **Tailwind CSS** to style them.
+> [!TIP]
+> To indicate that these styles aren't meant to be used outside of `Card`, you can name them `data-p-component` (`p` for `private`) or use another naming convention.
 
-## Documentation
+### How to define CSS variables
+
+```css
+:root {
+  --primary-color: #007bff;
+  --secondary-color: #6c757d;
+}
+
+button {
+  background: var(--primary-color)
+  /* ... */
+```
 
-https://typicode.github.io/mistcss
+See also your CSS framework/tooling documentation for ways to define them in JS if you prefer.
 
-## Supports
+### Origin of the project name?
 
-- [Next.js](https://nextjs.org/)
-- [Remix](https://remix.run/)
-- [React](https://react.dev/)
-- [Vue](https://vuejs.org)
-- [Svelte](https://svelte.dev/)
-- [Astro](https://astro.build/)
-- [Hono](https://hono.dev/)
-- [Tailwind CSS](https://tailwindcss.com/)
+Mist is inspired by atomized water 💧 often seen near waterfalls. A nod to the _Cascading_ in CSS 🌊.