80 lines
1.8 KiB
HTML
80 lines
1.8 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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<style>
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*{
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margin: 0;
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padding: 0;
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}
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#app>div{
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font-size: 20px;
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text-align: center;
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margin: 20px;
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font-weight: bolder;
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}
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ul{
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list-style: none;
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text-align: center;
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}
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li{
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text-align: center;
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display: inline-block;
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}
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</style>
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</head>
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<body>
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<div id="app">
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<div>总数量：{{PrintSummer}}</div>
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<ul>
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<li :style="isChangeStyle()" v-for="list in item">{{list}}</li>
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</ul>
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</div>
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</body>
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<script src="../JavaScript/vue.min.js"></script>
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<script>
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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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item:[
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{bid:01,name:"vue实验指南",count:66},
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{bid:02,name:"C Primser",count:13},
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{bid:01,name:"零基础学python",count:34},
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{bid:01,name:"java程序设计",count:55},
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{bid:01,name:"python从入门到精通",count:76},
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],
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isFontSize:"20px",
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isColor:"#f00",
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},
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methods: {
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isChangeStyle(){
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return {fontSize:this.isFontSize,color:this.isColor}
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}
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},
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computed:{
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PrintSummer(){
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//推荐写法： for(let book of this.item){
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// sum+=book.count;
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// }
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// for(let book in this.item){
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// sum+=this.item[book].count
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// }
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// return sum;
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// for(let i=0;i<this.item.length;i++){
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// sum+=this.item[i].count
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// }
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// return sum
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for(let book of this.item){
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sum+=book.count
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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> |