<div id="app">
<div class="p-5">
<div id="app">
<h3>使用 methods 處理複雜資料</h3>
<ul>
<li v-for="product in products">
{{ product.name }} / {{ product.price }}
<button type="button" @click="addToCart(product)">加入購物車</button>
</li>
</ul>
<h6>購物車項目</h6>
<ul>
<li v-for="item in carts">{{ item.name }}</li>
</ul>
總金額 {{ sum }}
<h3>作為 $filter 使用（取代複雜表達式）</h3>
總金額 {{ convertToAmount(sum) }}
</div>
</div>
</div>
const App = {
data() {
return {
num: 10,
products: [
{
name: '蛋餅',
price: 30,
vegan: false
},
{
name: '飯糰',
price: 35,
vegan: false
},
{
name: '小籠包',
price: 60,
vegan: false
},
{
name: '蘿蔔糕',
price: 30,
vegan: true
},
],
carts: [],
sum: 0,
}
},
methods: {
trigger(name) {
console.log(name, '此事件被觸發了')
},
callOtherMethod() {
this.trigger('由 callOtherMethod 觸發')
},
methodParameter(a, b, c, d) {
console.log(a, b, c, d)
},
addToCart(product) {
this.carts.push(product)
this.calculate();
},
calculate() {
let total = 0;
this.carts.forEach(item => {
total += item.price;
});
this.sum = total;
},
convertToAmount(price) {
return `NT$ ${price}`;
}
},
created() {
this.trigger('由生命週期觸發');
}
};
Vue.createApp(App).mount('#app');
