相册图片切换效果-vue

效果：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>相册展示</title>
    <style>
        #app{
            position: relative;
            width: 500px;
        }
        img{
            width: 500px;
        }
        #left{
            position: absolute;
            top: 150px;
            left: 0;
        }
        #right{
            position: absolute;
            top: 150px;
            right: 0;
        }
        button{
            width: 30px;
            height: 60px;
        }
    </style>
    <!-- <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script> -->
    <script src="../../node_modules/vue/dist/vue.js"></script>
</head>
<body>
    <div id="app">
        <img :src="imgArr[showidx]">
        <div id="btns">
            <button id="left" @click="left()">&lt;</button>
            <button id="right" @click="right()">&gt;</button>
        </div>
    </div>
    <script>
        new Vue({
            el:"#app",
            data:{
                showidx:0,
                // imgUrl:'./images/1.jpg',
                imgArr:[
                    './images/1.jpg','./images/2.jpg','./images/3.jpg','./images/4.jpg'
                ]
            },
            methods:{
                left(){
                    this.showidx--;
                    if(this.showidx <= -1){
                        this.showidx = 3;
                    }
                    // this.imgUrl = this.imgArr[this.showidx];
                    console.log(this.showidx)
                },
                right(){
                    this.showidx++;
                    if(this.showidx >= this.imgArr.length){
                        this.showidx = 0;
                    }
                    // this.imgUrl = this.imgArr[this.showidx];
                    console.log(this.showidx)

                }
            }
        })
    </script>
</body>
</html>