<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script src="https://cdn.jsdelivr.net/npm/axios/dist/axios.min.js"></script>
<style>
img {
width: 200px;
height: 100px;
}
</style>
</head>
<body>
<script src="/static/js/vue.js"></script>
<div id="app">
<button @click="fn(-1)">上一页</button>
<img :src="list[idx]" alt="">
<button @click="fn(1)">下一页</button>
</div>
<script>
const app = new Vue({
el: '#app',
data: {
list: [
'https://img95.699pic.com/element/40094/7120.png_860.png',
'https://img95.699pic.com/element/40094/7121.png_860.png',
'https://img95.699pic.com/element/40134/5131.png_860.png'
],
idx: 0,
},
methods: {
fn(a) {
if (this.idx == 0 && a == -1)
this.idx = 2
else if (this.idx == 2 && a == 1)
this.idx = 0
else this.idx += a;
}
}
});
</script>
</body>
</html>
