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                >[success] # v-memo(新)-- 緩存指定值 1. 數組里的每個值都與最后一次的渲染相同,那么整個子樹的更新將被跳過 * 下面案例中 點擊`改變信息`,內容不會更改因為` v-memo` 中`name, age` 沒有發生改變,因此這個節點中即使`height `改變了也不會渲染視圖 ~~~ <html lang="en"> <head> <meta charset="UTF-8" /> <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <meta name="viewport" content="width=device-width, initial-scale=1.0" /> <title>Document</title> </head> <body> <div id="app"> <div v-memo="[name, age]"> <h2>姓名: {{ name }}</h2> <h2>年齡: {{ age }}</h2> <h2>身高: {{ height }}</h2> </div> <button @click="updateInfo">改變信息</button> </div> <script src="https://unpkg.com/vue@next"></script> <script> // 1.創建app const app = Vue.createApp({ // data: option api data: function () { return { name: 'www', age: 18, height: 1.88, } }, methods: { updateInfo: function () { this.name = 'www' this.age = 18 this.height = 10000000 }, }, }) // 2.掛載app app.mount('#app') </script> </body> </html> ~~~
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