Stepper Component in the Next.js Supabase SaaS kit

The Stepper component is a versatile UI element designed to display a series of steps in a process or form. It provides visual feedback on the current step and supports different visual styles.

Usage

import { Stepper } from '@kit/ui/stepper';
function MyComponent() {
  return (
    <Stepper
      steps={['Step 1', 'Step 2', 'Step 3']}
      currentStep={1}
      variant="default"
    />
  );
}

Props

The Stepper component accepts the following props:

• steps: string[] (required): An array of strings representing the labels for each step.
• currentStep: number (required): The index of the currently active step (0-based).
• variant?: 'numbers' | 'default' (optional): The visual style of the stepper. Defaults to 'default'.

Variants

The Stepper component supports two visual variants:

1. default: Displays steps as a horizontal line with labels underneath.
2. numbers: Displays steps as numbered circles with labels between them.

Features

• Responsive design that adapts to different screen sizes
• Dark mode support
• Customizable appearance through CSS classes and variants
• Accessibility support with proper ARIA attributes

Component Breakdown

Main Stepper Component

The main Stepper function renders the overall structure of the component. It:

• Handles prop validation and default values
• Renders nothing if there are fewer than two steps
• Uses a callback to render individual steps
• Applies different CSS classes based on the chosen variant

Steps Rendering

Steps are rendered using a combination of divs and spans, with different styling applied based on:

• Whether the step is currently selected
• The chosen variant (default or numbers)

StepDivider Component

For the 'numbers' variant, a StepDivider component is used to render the labels between numbered steps. It includes:

• Styling for selected and non-selected states
• A divider line between steps (except for the last step)

Styling

The component uses a combination of:

• Tailwind CSS classes for basic styling
• cva (Class Variance Authority) for managing variant-based styling
• classNames function for conditional class application

Accessibility

• The component uses aria-selected to indicate the current step
• Labels are associated with their respective steps for screen readers

Customization

You can further customize the appearance of the Stepper by:

1. Modifying the classNameBuilder function to add or change CSS classes
2. Adjusting the Tailwind CSS classes in the component JSX
3. Creating new variants in the cva configuration

Example

<Stepper
  steps={['Account', 'Personal Info', 'Review']}
  currentStep={1}
  variant="numbers"
/>

This will render a numbered stepper with three steps, where "Personal Info" is the current (selected) step.

The Stepper component provides a flexible and visually appealing way to guide users through multi-step processes in your application. Its support for different variants and easy customization makes it adaptable to various design requirements.