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                控制切換一個元素的顯示也相當簡單: ~~~ <div id="app-3"> <p v-if="seen">Now you see me</p> </div> ~~~ ~~~ var app3 = new Vue({ el: '#app-3', data: { seen: true } }) ~~~ 繼續在控制臺設置 app3.seen = false,你會發現 “Now you see me” 消失了。 這個例子演示了我們不僅可以綁定 DOM 文本到數據,也可以綁定 DOM 結構到數據。而且,Vue.js 也提供一個強大的過渡效果系統,可以在 Vue 插入/刪除元素時自動應用過渡效果。 也有一些其它指令,每個都有特殊的功能。例如, v-for 指令可以綁定數據到數組來渲染一個列表: ~~~ <div id="app-4"> <ol> <li v-for="todo in todos"> {{ todo.text }} </li> </ol> </div> ~~~ ~~~ var app4 = new Vue({ el: '#app-4', data: { todos: [ { text: 'Learn JavaScript' }, { text: 'Learn Vue' }, { text: 'Build something awesome' } ] } }) ~~~ 1. learn javascript 2. learn vue 3. learn php
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