How to build a stepper in Vue

<template>
  <div class='stepper'>
    <div class='stepper-header'>
      <div
        v-for='(step, index) in steps'
        :key='index'
        class='stepper-step'
        :class='{
          active: currentStep === index,
          completed: currentStep > index
        }'
      >
        <div class='step-circle'>
          <span v-if='currentStep > index'>✓</span>
          <span v-else>{{ index + 1 }}</span>
        </div>
        <div class='step-label'>{{ step.title }}</div>
        <div v-if='index < steps.length - 1' class='step-line'></div>
      </div>
    </div>

    <div class='stepper-content'>
      <slot :name='`step-${currentStep}`'></slot>
    </div>

    <div class='stepper-actions'>
      <button
        v-if='currentStep > 0'
        @click='previousStep'
        class='btn btn-secondary'
      >
        Previous
      </button>

      <button
        v-if='currentStep < steps.length - 1'
        @click='nextStep'
        class='btn btn-primary'
        :disabled='!canProceed'
      >
        Next
      </button>

      <button
        v-if='currentStep === steps.length - 1'
        @click='finish'
        class='btn btn-success'
        :disabled='!canProceed'
      >
        Finish
      </button>
    </div>
  </div>
</template>

<script setup>
import { ref, computed } from 'vue'

const props = defineProps({
  steps: {
    type: Array,
    required: true
  },
  canProceed: {
    type: Boolean,
    default: true
  }
})

const emit = defineEmits(['step-change', 'finish'])

const currentStep = ref(0)

const nextStep = () => {
  if (currentStep.value < props.steps.length - 1 && props.canProceed) {
    currentStep.value++
    emit('step-change', currentStep.value)
  }
}

const previousStep = () => {
  if (currentStep.value > 0) {
    currentStep.value--
    emit('step-change', currentStep.value)
  }
}

const finish = () => {
  if (props.canProceed) {
    emit('finish')
  }
}

defineExpose({ currentStep, nextStep, previousStep })
</script>

<style scoped>
.stepper {
  width: 100%;
  padding: 20px;
}

.stepper-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 40px;
  position: relative;
}

.stepper-step {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
}

.step-circle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: #e0e0e0;
  color: #666;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  z-index: 2;
  transition: all 0.3s;
}

.stepper-step.active .step-circle {
  background: #007bff;
  color: white;
}

.stepper-step.completed .step-circle {
  background: #28a745;
  color: white;
}

.step-label {
  margin-top: 10px;
  font-size: 14px;
  color: #666;
  text-align: center;
}

.stepper-step.active .step-label {
  color: #007bff;
  font-weight: 600;
}

.step-line {
  position: absolute;
  top: 20px;
  left: 50%;
  width: 100%;
  height: 2px;
  background: #e0e0e0;
  z-index: 1;
}

.stepper-step.completed .step-line {
  background: #28a745;
}

.stepper-content {
  min-height: 200px;
  padding: 20px;
  border: 1px solid #ddd;
  border-radius: 4px;
  margin-bottom: 20px;
}

.stepper-actions {
  display: flex;
  justify-content: space-between;
  gap: 10px;
}

.btn {
  padding: 10px 20px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
  transition: all 0.2s;
}

.btn-primary {
  background: #007bff;
  color: white;
}

.btn-secondary {
  background: #6c757d;
  color: white;
}

.btn-success {
  background: #28a745;
  color: white;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
</style>

<template>
  <Stepper
    :steps='steps'
    :can-proceed='isStepValid'
    @step-change='handleStepChange'
    @finish='handleFinish'
  >
    <template #step-0>
      <h3>Personal Information</h3>
      <input v-model='formData.name' placeholder='Name'>
      <input v-model='formData.email' placeholder='Email'>
    </template>

    <template #step-1>
      <h3>Address</h3>
      <input v-model='formData.address' placeholder='Address'>
      <input v-model='formData.city' placeholder='City'>
    </template>

    <template #step-2>
      <h3>Review</h3>
      <p>Name: {{ formData.name }}</p>
      <p>Email: {{ formData.email }}</p>
      <p>Address: {{ formData.address }}</p>
    </template>
  </Stepper>
</template>

<script setup>
import { ref, computed } from 'vue'
import Stepper from './Stepper.vue'

const steps = ref([
  { title: 'Personal Info' },
  { title: 'Address' },
  { title: 'Review' }
])

const formData = ref({
  name: '',
  email: '',
  address: '',
  city: ''
})

const isStepValid = computed(() => {
  // Add validation logic
  return true
})

const handleStepChange = (step) => {
  console.log('Changed to step:', step)
}

const handleFinish = () => {
  console.log('Form submitted:', formData.value)
}
</script>