Implementing a Modal Component with Vue 3 Teleport

// components/MyModal.vue
<template>
  <teleport to="body">
    <div v-if="isVisible" class="modal-backdrop" @click.self="closeModal">
      <div class="modal-content">
        <header class="modal-header">
          <h3>{{ title }}</h3>
          <button class="close-button" @click="closeModal">&times;</button>
        </header>
        <div class="modal-body">
          <slot></slot>
        </div>
        <footer class="modal-footer">
          <button @click="closeModal">Close</button>
        </footer>
      </div>
    </div>
  </teleport>
</template>

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

const props = defineProps({
  isVisible: {
    type: Boolean,
    default: false,
  },
  title: {
    type: String,
    default: 'Modal Title',
  },
});

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

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

<style scoped>
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
}

.modal-content {
  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;
}

.close-button {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
}
</style>

<!-- App.vue (example usage) -->
<template>
  <div>
    <h1>My App</h1>
    <button @click="showModal = true">Open Modal</button>

    <MyModal :isVisible="showModal" title="Important Notice" @close="showModal = false">
      <p>This is the content of the modal. It can be anything you want!</p>
      <p>It's rendered directly into the body thanks to Teleport.</p>
    </MyModal>
  </div>
</template>

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

const showModal = ref(false);
</script>