Building Reusable Overlay Components with Vue 3 Teleport

// src/components/ModalOverlay.vue
<template>
  <teleport to="body">
    <div v-if="isOpen" class="modal-backdrop" @click.self="closeModal">
      <div class="modal-content">
        <button class="modal-close" @click="closeModal">×</button>
        <slot></slot>
      </div>
    </div>
  </teleport>
</template>

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

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

const emit = defineEmits(['update:isOpen']);

const closeModal = () => {
  emit('update:isOpen', false);
};
</script>

<style scoped>
.modal-backdrop {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
}
.modal-content {
  background: white;
  padding: 20px;
  border-radius: 8px;
  min-width: 300px;
  max-width: 80%;
  position: relative;
}
.modal-close {
  position: absolute;
  top: 10px;
  right: 10px;
  border: none;
  background: transparent;
  font-size: 1.5em;
  cursor: pointer;
}
</style>

// src/App.vue (example usage)
<template>
  <div>
    <h1>My App</h1>
    <button @click="showModal = true">Open Modal</button>
    
    <ModalOverlay v-model:is-open="showModal">
      <h2>Modal Title</h2>
      <p>This content is inside the modal and can be anything!</p>
      <button @click="showModal = false">Close from inside</button>
    </ModalOverlay>
  </div>
</template>

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

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