話不多說，直接上代碼
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>翻頁</title>
<style>
#ol1 li{
width: 100px;
height: 50px;
line-height: 50px;
}
</style>
</head>
<body>
<div>
<ol id="ol1">
</ol>
<div>
<button class="pageChange" pageNum="0">第一頁</button>
<button class="pageChange" pageNum="1">第二頁</button>
<button class="pageChange" pageNum="2">第三頁</button>
</div>
</div>
<script type="text/javascript">
window.onload = function ()
{
// 自定義數據 實際開發中 數據是從後臺獲取
var data = [
{ name: "aa", age: 10},
{ name: "bb", age: 11},
{ name: "cc", age: 12},
{ name: "dd", age: 23},
{ name: "ee", age: 50},
{ name: "ff", age: 24},
{ name: "gg", age: 62},
{ name: "hh", age: 16},
{ name: "ii", age: 35}
];
// 取前三條數據初始化頁面
var oOl = document.getElementById('ol1');
var outStr = "";
for (var i = 0; i < 3; i++) {
outStr += '<li><span>' + data[i].name + '</span> <span>' + data[i].age + '</span></li>';
}
oOl.innerHTML = outStr;
// 實現翻頁功能
var aBtn = document.getElementsByClassName('pageChange');
for (var j = 0; j < aBtn.length; j++) { // 爲每個頁數按鈕都設置點擊事件
aBtn[j].onclick = function (event) {
var pageNum = parseInt(event.target.getAttribute("pageNum")); // 獲取自定義屬性pageNum的值 並將其轉換爲數字類型 釋：pageNum表明當前時第幾頁
outStr = "";
for (var i = pageNum*3; i < pageNum*3+3; i++) { //通過頁數獲取data中相應段的值
outStr += '<li><span>' + data[i].name + '</span> <span>' + data[i].age + '</span></li>';
}
oOl.innerHTML = outStr;
}
}
}
</script>
</body>
</html>運行結果：
點擊頁面按鈕就可切換顯示不同的數據