<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="https://unpkg.com/vue/dist/vue.js"></script>
</head>
<body>
<div id="app">
<p>{{ message }}</p>
<p>{{ totalPrice }}</p>
</div>
<script>
new Vue({
el: '#app',
data: {
message: 'Hello Vue.js!',
books: [{
id: 1,
name: 'HTML/HTML5基础',
price: 58
},
{
id: 2,
name: '高健壮性CSS',
price: 68
},
{
id: 3,
name: '深入学习JS',
price: 78
}
]
},
computed: {
totalPrice: function() {
let result = 0;
for (let i = 0; i < this.books.length; i++) {
result += this.books[i].price;
}
return result;
},
totalPrice: function() {
let result = 0;
for (let i in this.books) {
result += this.books[i].price;
}
return result;
},
}
})
</script>
</body>
</html>
