Build a Reusable Modal Component with Vue 3 Slots

// components/BaseModal.vue
<template>
  <div v-if="isOpen" class="modal-overlay" @click.self="closeModal">
    <div class="modal-container">
      <div class="modal-header">
        <slot name="header">
          <h3>Default Header</h3>
        </slot>
        <button @click="closeModal" class="modal-close-button">&times;</button>
      </div>
      <div class="modal-body">
        <slot name="body">
          <p>Default modal body content.</p>
        </slot>
      </div>
      <div class="modal-footer">
        <slot name="footer" :close="closeModal">
          <button @click="closeModal">Close</button>
        </slot>
      </div>
    </div>
  </div>
</template>

<script setup>
import { defineProps, defineEmits } from 'vue';

const props = defineProps({
  isOpen: {
    type: Boolean,
    default: false
  }
});

const emit = defineEmits(['close']);

const closeModal = () => {
  emit('close');
};
</script>

<style scoped>
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
}
.modal-container {
  background: white;
  padding: 20px;
  border-radius: 8px;
  min-width: 300px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  position: relative;
}
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 15px;
  border-bottom: 1px solid #eee;
  padding-bottom: 10px;
}
.modal-close-button {
  background: none;
  border: none;
  font-size: 1.5em;
  cursor: pointer;
}
.modal-footer {
  margin-top: 20px;
  border-top: 1px solid #eee;
  padding-top: 10px;
  text-align: right;
}
</style>

<!-- App.vue (Usage Example) -->
<template>
  <div>
    <button @click="isModalOpen = true">Open Custom Modal</button>
    <BaseModal :is-open="isModalOpen" @close="isModalOpen = false">
      <template #header>
        <h2>My Custom Modal Title</h2>
      </template>
      <template #body>
        <p>This is the custom body content for my modal. It can contain any HTML.</p>
        <input type="text" placeholder="Enter something" />
      </template>
      <template #footer="{ close }">
        <button @click="handleConfirm">Confirm</button>
        <button @click="close">Cancel</button>
      </template>
    </BaseModal>
  </div>
</template>

<script setup>
import { ref } from 'vue';
import BaseModal from './components/BaseModal.vue';

const isModalOpen = ref(false);

const handleConfirm = () => {
  alert('Confirmed!');
  isModalOpen.value = false;
};
</script>