#434 Multi-Stepper Component

Create a reusable Multi-Stepper UI component in React + TypeScript.

The component visually represents a sequence of steps (like a checkout wizard) and exposes imperative helpers to move forward/backward.

Requirements

1. Props

   interface StepperProps {
     steps: string[];           // Step titles / labels
     initialStep?: number;      // default 0
     onChange?: (index: number) => void; // called after a step change
     allowSkip?: boolean;       // if true, clicking ahead skips steps
     vertical?: boolean;        // render vertically instead of horizontally
   }

2. API – the component must forward a ref exposing:

   interface StepperRef {
     next: () => void;
     prev: () => void;
     goTo: (index: number) => void;
     reset: () => void;
   }

3. Behaviour

   • Highlight the current step.
   • Disable prev on first step and next on last step.
   • Emit onChange every time the active step changes.
   • If allowSkip is false, clicking a future step does nothing.
   • When vertical is true, render the steps top-to-bottom, otherwise left-to-right.

4. Accessibility

   • Use semantic buttons for step controls.
   • Provide aria-current="step" on the active step.

Example Usage

const Wizard = () => {
  const stepperRef = useRef<StepperRef>(null);

  return (
    <>
      <Stepper ref={stepperRef} steps={["Cart", "Address", "Payment", "Review"]} />
      <button onClick={() => stepperRef.current?.prev()}>Back</button>
      <button onClick={() => stepperRef.current?.next()}>Next</button>
    </>
  );
};