Function next

src/useMultistepForm.ts:6–11

()

  const [currentStepIndex, setCurrentStepIndex] = useState(0)

  function next() {
    setCurrentStepIndex(i => {
      if (i >= steps.length - 1) return i
      return i + 1
    })
  }

  function back() {
    setCurrentStepIndex(i => {