javascript - 使用vue做個抽獎問題

程式碼：

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title></title>
    <script src="//cdn.bootcss.com/vue/2.3.4/vue.min.js"></script>
    <style>
        * {
            margin: 0;
            padding: 0;
        }

        #app ul li {
            width: 100px;
            height: 100px;
            box-sizing: border-box;
            background: #ccc;
            float: left;
        }

        #app ul li.active {
            border: 3px solid red;
        }
    </style>
</head>
<body>
<p id="app">
    <ul>
        <li v-for="(item, index) of items" :class="{active: index == actvieIndex}">{{ item.name }}</li>
    </ul>
</p>
<script>
var app = new Vue({
    el: '#app',
    data () {
        return {
            actvieIndex: 0,
            items: [
                {name: '1'},
                {name: '2'},
                {name: '3'},
                {name: '4'},
                {name: '5'},  // 这些都假设是一些用户名字
                {name: '6'},
                {name: '7'},
                {name: '8'},
                {name: '9'},
                {name: '10'},
                {name: '11'},
                {name: '12'},
                {name: '13'},
                {name: '14'},
                {name: '15'},
                {name: '16'},
                {name: '17'},
            ]
        }
    },
    mounted () {
        setInterval(() => {
            this.actvieIndex++;
            if(this.actvieIndex >= this.items.length ) this.actvieIndex = 0;
        }, 50);
    }
})
</script>
</body>
</html>

例如10秒就要停止顯示，快到10秒了，就應該慢慢的停止。這樣用戶才會有那種激動感。

相信大家都玩過轉盤，就跟那個類似。但是不知道怎麼做。

ringa_lee2692 天前820

<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title></title> <script src="//cdn.bootcss.com/vue/2.3.4/vue.min.js"></script> <style> * { margin: 0; padding: 0; } #app ul li { width: 100px; height: 100px; box-sizing: border-box; background: #ccc; float: left; } #app ul li.active { border: 3px solid red; } </style> </head> <body> <p id="app"> <ul> <li v-for="(item, index) of items" :class="{active: index == actvieIndex}">{{ item.name }}</li> </ul> </p> <script> var app = new Vue({ el: '#app', data () { return { actvieIndex: 0, i: 0, count: 0, items: [ {name: '1'}, {name: '2'}, {name: '3'}, {name: '4'}, {name: '5'}, // 这些都假设是一些用户名字 {name: '6'}, {name: '7'}, {name: '8'}, {name: '9'}, {name: '10'}, {name: '11'}, {name: '12'}, {name: '13'}, {name: '14'}, {name: '15'}, {name: '16'}, {name: '17'}, ] } }, methods: { go(seconds) { const SECONDS = seconds * 1000; const HALF_SECONDS = SECONDS / 2; const FREQUENCY = 50; setTimeout(() => { console.log(this.count) this.actvieIndex++; if(this.actvieIndex >= this.items.length ) this.actvieIndex = 0; if (this.count >= HALF_SECONDS) { this.i+= 10; this.count += 50 + this.i; } else { this.count += 50; } if (this.count <= SECONDS) { this.go(seconds) } }, FREQUENCY + this.i); } }, mounted () { this.go(5) } }) </script> </body> </html>

javascript - 使用vue做個抽獎問題

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