Creating Modals and Notifications with Vue 3 Teleport

<!-- public/index.html (add a target div) -->
<!--
<div id="app"></div>
<div id="modals-container"></div>
-->

<!-- src/components/MyModal.vue -->
<template>
  <Teleport to="#modals-container">
    <div v-if="isOpen" class="modal-backdrop" @click="closeModal">
      <div class="modal-content" @click.stop>
        <h3>{{ title }}</h3>
        <p><slot>Default modal content.</slot></p>
        <button @click="closeModal">Close</button>
      </div>
    </div>
  </Teleport>
</template>

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

const props = defineProps({
  isOpen: Boolean,
  title: String
});

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

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

<style scoped>
.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: white;
  padding: 20px;
  border-radius: 8px;
  min-width: 300px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  z-index: 1001;
}
</style>

<!-- src/App.vue (or parent component) -->
<template>
  <div>
    <h1>Teleport Example</h1>
    <button @click="isModalOpen = true">Open Modal</button>

    <MyModal v-model:is-open="isModalOpen" title="Important Notice">
      <p>This modal is rendered in a different DOM location!</p>
      <p>It uses `Teleport` to avoid z-index or overflow issues from parent components.</p>
    </MyModal>

    <div style="height: 1000px; background: lightblue; padding: 20px; margin-top: 20px;">
      <p>This is some other content.</p>
      <p>Scroll down to see if the modal is affected by this parent's styling (it shouldn't be!).</p>
    </div>
  </div>
</template>

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

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