<!DOCTYPE html>
<html>
<head>
<title>Shopping List</title>
<style>
form {
border: dashed black 1px;
width: 200px;
padding: 20px;
}
</style>
</head>
<body>
<h1>Example: Shopping List</h1>
<div id="app">
<form v-on:submit.prevent="addItem">
<p>
What do you need?
<input type="text" required placeholder="item name.." v-model="itemName">
</p>
<p>
How many?
<input type="number" placeholder="number of items.." v-model="itemNumber">
</p>
<button type="submit">Add item</button>
</form>
<div>
<p>Shopping list:</p>
<ul>
<li v-for="item in shoppingList">{{ item.name }}, {{ item.number}}</li>
</ul>
</div>
</div>
<script src="https://unpkg.com/vue@3/dist/vue.global.js"></script>
<script>
const app = Vue.createApp({
data() {
return {
itemName: null,
itemNumber: null,