Render Modals and Overlays with Vue 3 Teleport

// ModalComponent.vue
<template>
  <teleport to="body"> <!-- Teleports the modal content directly into the body -->
    <div v-if="isOpen" class="modal-backdrop" @click.self="closeModal">
      <div class="modal-content">
        <h2>{{ title }}</h2>
        <p>This is the content of the modal. It appears outside its parent component's DOM tree.</p>
        <slot></slot>
        <button @click="closeModal">Close</button>
      </div>
    </div>
  </teleport>
</template>

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

const props = defineProps({
  isOpen: {
    type: Boolean,
    required: true,
  },
  title: {
    type: String,
    default: 'Modal Title',
  },
});

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

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

<style scoped>
/* Basic styling for the modal */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
}
.modal-content {
  background-color: white;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  max-width: 500px;
  width: 90%;
}
</style>

// App.vue
<template>
  <div>
    <h1>My App</h1>
    <p>Welcome to the main application content.</p>
    <button @click="isModalOpen = true">Open Modal</button>

    <ModalComponent :is-open="isModalOpen" title="Important Notice" @close="isModalOpen = false">
      <p>You can pass custom content into the modal via slots!</p>
    </ModalComponent>
  </div>
</template>

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

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