padcom/index.html

## index.html
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Dialogs</title>
  <script src="https://unpkg.com/vue"></script>
</head>
<body>
  <div id="app">
    <button @click="open">Show dialog</button>
    <notification-dialog ref="dialog">
      <p>{{ message }}</p>
      <template #buttons="{ close }">
        <button @click="close('ok')">OK</button>
        <button @click="close('cancel')">Cancel</button>
      </template>
    </notification-dialog>
  </div>

  <template id="notification-dialog">
    <dialog ref="dialog" @close="close(null)">
      <h2>{{ title }}</h2>
      <div class="dialog__body">
        <slot></slot>
      </div>
      <div class="dialog__buttons">
        <slot name="buttons" :close="close"></slot>
      </div>
    </dialog>
  </template>

  <script>
    Vue.component('notification-dialog', {
      template: '#notification-dialog',
      props: {
        title: { type: String, default: 'Notification' }
      },
      methods: {
        open() {
          return new Promise(resolve => {
            this.resolve = resolve
            this.$refs.dialog.showModal()
          })
        },
        close(result) {
          this.$refs.dialog.close()
          this.resolve && this.resolve(result)
          this.resolve = null
        }
      }
    })
  </script>

  <script>
    new Vue({
      el: '#app',
      data: {
        message: 'Hello, world!'
      },
      methods: {
        async open() {
          const result = await this.$refs.dialog.open()
          console.log('Dialog result:', result)
        }
      }
    })
  </script>
</body>
</html>
	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<title>Dialogs</title>
	<script src="https://unpkg.com/vue"></script>
	</head>
	<body>
	<div id="app">
	<button @click="open">Show dialog</button>
	<notification-dialog ref="dialog">
	<p>{{ message }}</p>
	<template #buttons="{ close }">
	<button @click="close('ok')">OK</button>
	<button @click="close('cancel')">Cancel</button>
	</template>
	</notification-dialog>
	</div>

	<template id="notification-dialog">
	<dialog ref="dialog" @close="close(null)">
	<h2>{{ title }}</h2>
	<div class="dialog__body">
	<slot></slot>
	</div>
	<div class="dialog__buttons">
	<slot name="buttons" :close="close"></slot>
	</div>
	</dialog>
	</template>

	<script>
	Vue.component('notification-dialog', {
	template: '#notification-dialog',
	props: {
	title: { type: String, default: 'Notification' }
	},
	methods: {
	open() {
	return new Promise(resolve => {
	this.resolve = resolve
	this.$refs.dialog.showModal()
	})
	},
	close(result) {
	this.$refs.dialog.close()
	this.resolve && this.resolve(result)
	this.resolve = null
	}
	}
	})
	</script>

	<script>
	new Vue({
	el: '#app',
	data: {
	message: 'Hello, world!'
	},
	methods: {
	async open() {
	const result = await this.$refs.dialog.open()
	console.log('Dialog result:', result)
	}
	}
	})
	</script>
	</body>
	</html>