Arto - A type-safe library for flexible class name management in scalable UIs.

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Arto

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Key Features

Variants: Easily define style options such as size and color without resorting to complicated conditional logic.
States: Conditional classes can be applied for various states like disabled and hovered, with optional dependency logic.
Rules & Logic: Allow for dynamic addition or removal of classes using logical operators (AND, OR, XOR, etc.) or custom callbacks.
Fully Extensible: Supports the integration of plugins, enabling additional functionality like theming and compatibility with various UI frameworks.
Type-Safe: Developed with TypeScript, ensuring robust validation for greater developer confidence and reliability.
Lightweight: Works without external dependencies, integrating smoothly with any selected framework, including React, Vue, and Svelte.
Framework Agnostic: Compatible with any CSS strategy, such as Tailwind, PostCSS, or CSS Modules.

Quick Example

Here is a simplified example demonstrating how to effectively utilize Arto:

import { arto } from 'arto'

// Create an instance of arto with basic configuration
const myArto = arto({
  className: 'btn',
  variants: {
    size: {
      small: 'btn-sm',
      large: 'btn-lg',
    },
  },
  states: {
    disabled: 'opacity-50 pointer-events-none',
  },
})

// Generate the final class string
const classString = myArto({
  variants: { size: 'large' },
  states: { disabled: true },
})

// => "btn btn-lg opacity-50 pointer-events-none"

Advanced Example

A more complex example is as follows, showcasing advanced features such as nested state definitions and conditional logic:

import { arto } from 'arto'

type Variants = {
  intent: 'info' | 'danger' | 'success'
  size: 'sm' | 'md'
}
type States = 'hovered' | 'disabled'
type Context = {
  username: string
}

const myArto = arto<Variants, States, Context>({
  className: 'base',
  variants: {
    intent: {
      info: 'intent-info',
      danger: {
        className: 'intent-danger',
        states: {
          hovered: {
            className: 'intent-danger-hovered',
            dependsOn: [{ not: ['disabled'] }],
          },
        },
      },
      success: (ctx) => (ctx?.username === 'admin' ? 'intent-success-admin' : 'intent-success'),
    },
    size: {
      sm: 'size-sm',
      md: 'size-md',
    },
  },
  states: {
    hovered: {
      className: 'global-hovered',
      dependsOn: [{ not: ['disabled'] }],
    },
    disabled: 'global-disabled',
  },
  rules: [
    {
      when: {
        variants: { intent: ['info', 'danger'] },
        states: ['hovered'],
        logic: 'AND',
      },
      add: 'rule-class',
    },
  ],
})

// Usage examples:
const exampleA = myArto({
  variants: { intent: 'info', size: 'sm' },
})
// => "base rule-class intent-info size-sm"

const exampleB = myArto({
  variants: { intent: 'danger', size: 'sm' },
  states: { hovered: true, disabled: true },
})
// => "base rule-class intent-danger size-sm global-disabled"

const exampleC = myArto({
  variants: { intent: 'success', size: 'md' },
  states: { hovered: true },
  context: { username: 'admin' },
})
// => "base intent-success-admin size-md global-hovered"

Documentation

For comprehensive documentation and further details, please visit arto.elgndy.com.

Contributions to the project are welcome and encouraged. For guidelines on contributing, refer to the Contributing Guide.

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