46 lines
1.2 KiB
HTML
46 lines
1.2 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta http-equiv="X-UA-Compatible" content="IE=edge">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Document</title>
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</head>
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<body>
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<div id="app">
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<div>学生书籍总数量：{{BookCounts}}</div>
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</div>
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</body>
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<script src="../00-tools/JavaScript/vue.js"></script>
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<script>
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/*
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for循环ES6语法格式：for(变量 of 数组)
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输出数据的插值语法内容调用的是computed的属性
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*/
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let sum=0
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let vue=new Vue({
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el:"#app",
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data:{
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items:[
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{"sid":"2020103501","sname":"陈天恩","sbook":123},
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{"sid":"2020103502","sname":"窦兴","sbook":6},
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{"sid":"2020103503","sname":"蒋凯亮","sbook":9},
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{"sid":"2020103504","sname":"龚浩","sbook":20},
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{"sid":"2020103505","sname":"聂靖涛","sbook":8},
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{"sid":"2020103506","sname":"颜瑞景","sbook":10},
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{"sid":"2020103507","sname":"张可荣","sbook":3},
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{"sid":"2020103508","sname":"张天赐","sbook":8},
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]
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},
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computed:{
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BookCounts:function(){
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for(let book of this.items){
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sum+=book.sbook;
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}
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return sum
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}
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}
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})
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</script>
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</html> |