原生js版分页插件

var tableStyle =
    `.page {font-size: 14px;background-color: transparent;width: 100%;height: 50px;line-height: 50px;display: none;}
    .page .page-l select {width: 60px;height: 30px;}
    .page .page-l .page-size-box {display: inline-block;margin-left: 20px;}
    .page .page-r {float: right;padding-top: 10px;}
    .page .page-r ul {float: left;list-style: none;margin: 0;height: 30px;box-sizing: border-box;padding: 0;}
    .page .page-r ul li {float: left;list-style: none;height: 100%;line-height: 30px;border: 1px solid #ccc;border-right: 0 none;box-sizing: border-box;}
    .page .page-r ul li:hover {background-color: #f5f2f2;}
    .page .page-r ul li:last-child {border-right: 1px solid #ccc;}
    .page .page-r ul li a {text-decoration: none;display: block;height: 100%;padding:0 10px; color: #777;}
    .page .page-r ul li a.active {background-color: #09aeb0;color: #fff;}
    .page .page-r ul li span {display: block;height: 100%;padding:0 10px; color: #777;cursor: pointer;}
    .page .page-r ul li span.ellipsis {cursor: default;}`;

var styleNode = document.createElement(‘style‘);
styleNode.innerHTML = tableStyle;
var headNode = document.getElementsByTagName(‘head‘)[0];
headNode.appendChild(styleNode);

function Paging(paramsObj, callback) {
    this.pageSize = paramsObj.pageSize || 10;    //每页条数（不设置时，默认为10）
    this.pageIndex = paramsObj.pageIndex || 1;    //当前页码
    this.totalCount = paramsObj.totalCount || 0;   //总记录数
    this.totalPage = Math.ceil(paramsObj.totalCount / paramsObj.pageSize) || 0;     //总页数
    this.prevPage = paramsObj.prevPage || ‘<‘;     //上一页（不设置时，默认为：<）
    this.nextPage = paramsObj.nextPage || ‘>‘;     //下一页（不设置时，默认为：>）
    this.firstPage = paramsObj.firstPage || ‘<<‘;     //首页（不设置时，默认为：<<）
    this.lastPage = paramsObj.lastPage || ‘>>‘;     //末页（不设置时，默认为：>>）
    this.degeCount = paramsObj.degeCount || 3;             //当前页前后两边可显示的页码个数（不设置时，默认为3）
    this.ellipsis = paramsObj.ellipsis; //是否显示省略号不可点击按钮（true：显示，false：不显示）
    this.ellipsisBtn = (paramsObj.ellipsis == true || paramsObj.ellipsis == null) ? ‘<li><span class="ellipsis">…</span></li>‘ : ‘‘;
    var that = this;

    document.getElementById(‘page_size‘).value = this.pageSize;
    callback && callback(this.pageIndex, this.pageSize);    //立即执行回调函数

    // 生成分页DOM结构
    this.initPage = function (totalCount, totalPage, pageIndex) {
        this.totalCount = totalCount;
        this.totalPage = totalPage;
        this.pageSize = Math.ceil(totalCount / totalPage);
        var degeCount = this.degeCount;
        var pageHtml = ‘‘;
        var tmpHtmlPrev = ‘‘;
        var tmpHtmlNext = ‘‘;
        if(pageIndex - degeCount >= degeCount-1 && totalPage - pageIndex >= degeCount+1){   //前后都需要省略号按钮
            var count = degeCount;  //前后各自需要显示的页码个数
            for(var i=0; i<count; i++){
                if(pageIndex != 1){
                    tmpHtmlPrev += ‘<li><a href="javascript:;" class="page-number">‘+(pageIndex-(count-i))+‘</a></li>‘;
                }
                tmpHtmlNext += ‘<li><a href="javascript:;" class="page-number">‘+((pageIndex-0)+i+1)+‘</a></li>‘;
            }
            pageHtml = ‘<li><a id="first_page" href="javascript:;">‘+this.firstPage+‘</a></li>‘+
                ‘<li><a id="prev_page" href="javascript:;">‘+this.prevPage+‘</a></li>‘+
                ((pageIndex>degeCount+1) ? this.ellipsisBtn : ‘‘ )+
                tmpHtmlPrev +
                ‘<li><a href="javascript:;" class="active">‘+pageIndex+‘</a></li>‘+
                tmpHtmlNext +
                this.ellipsisBtn+
                ‘<li><a id="next_page" href="javascript:;">‘+this.nextPage+‘</a></li>‘+
                ‘<li><a id="last_page" href="javascript:;">‘+this.lastPage+‘</a></li>‘;
        }else if(pageIndex - degeCount >= degeCount-1 && totalPage - pageIndex < degeCount+1) { //前面需要省略号按钮，后面不需要
            var count = degeCount;  //前需要显示的页码个数
            var countNext = totalPage - pageIndex;  //后需要显示的页码个数
            if(pageIndex != 1){
                for(var i=0; i<count; i++){
                    tmpHtmlPrev += ‘<li><a href="javascript:;" class="page-number">‘+(pageIndex-(count-i))+‘</a></li>‘;
                }
            }
            for(var i=0; i<countNext; i++){
                tmpHtmlNext += ‘<li><a href="javascript:;" class="page-number">‘+((pageIndex-0)+i+1)+‘</a></li>‘;
            }
            pageHtml =  ‘<li><a id="first_page" href="javascript:;">‘+this.firstPage+‘</a></li>‘+
                ‘<li><a id="prev_page" href="javascript:;">‘+this.prevPage+‘</a></li>‘+
                ((pageIndex>degeCount+1) ? this.ellipsisBtn : ‘‘ )+
                tmpHtmlPrev +
                ‘<li><a href="javascript:;" class="active">‘+pageIndex+‘</a></li>‘+
                tmpHtmlNext +
                ‘<li><a id="next_page" href="javascript:;">‘+this.nextPage+‘</a></li>‘+
                ‘<li><a id="last_page" href="javascript:;">‘+this.lastPage+‘</a></li>‘;
        }else if(pageIndex - degeCount < degeCount-1 && totalPage - pageIndex >= degeCount+1){ //前面不需要，后面需要省略号按钮
            var countPrev = pageIndex - 1;  //前需要显示的页码个数
            var count = degeCount;  //后需要显示的页码个数
            if(pageIndex != 1){
                for(var i=0; i<countPrev; i++){
                    tmpHtmlPrev += ‘<li><a href="javascript:;" class="page-number">‘+(pageIndex-(countPrev-i))+‘</a></li>‘;
                }
            }
            for(var i=0; i<count; i++){
                tmpHtmlNext += ‘<li><a href="javascript:;" class="page-number">‘+((pageIndex-0)+i+1)+‘</a></li>‘;
            }
            pageHtml =  ‘<li><a id="first_page" href="javascript:;">‘+this.firstPage+‘</a></li>‘+
                ‘<li><a id="prev_page" href="javascript:;">‘+this.prevPage+‘</a></li>‘+
                tmpHtmlPrev +
                ‘<li><a href="javascript:;" class="active">‘+pageIndex+‘</a></li>‘+
                tmpHtmlNext +
                this.ellipsisBtn+
                ‘<li><a id="next_page" href="javascript:;">‘+this.nextPage+‘</a></li>‘+
                ‘<li><a id="last_page" href="javascript:;">‘+this.lastPage+‘</a></li>‘;
        }else if(pageIndex - degeCount < degeCount-1 && totalPage - pageIndex < degeCount+1){   //前后都不需要省略号按钮
            var countPrev = pageIndex - 1;  //前需要显示的页码个数
            var countNext = totalPage - pageIndex;  //后需要显示的页码个数
            if(pageIndex != 1){
                for(var i=0; i<countPrev; i++){
                    tmpHtmlPrev += ‘<li><a href="javascript:;" class="page-number">‘+(pageIndex-(countPrev-i))+‘</a></li>‘;
                }
            }
            for(var i=0; i<countNext; i++){
                tmpHtmlNext += ‘<li><a href="javascript:;" class="page-number">‘+((pageIndex-0)+i+1)+‘</a></li>‘;
            }
            pageHtml =  ‘<li><a id="first_page" href="javascript:;">‘+this.firstPage+‘</a></li>‘+
                ‘<li><a id="prev_page" href="javascript:;">‘+this.prevPage+‘</a></li>‘+
                tmpHtmlPrev +
                ‘<li><a href="javascript:;" class="active">‘+pageIndex+‘</a></li>‘+
                tmpHtmlNext +
                ‘<li><a id="next_page" href="javascript:;">‘+this.nextPage+‘</a></li>‘+
                ‘<li><a id="last_page" href="javascript:;">‘+this.lastPage+‘</a></li>‘;
        }
        document.getElementById(‘page_ul‘).innerHTML = pageHtml;
        document.getElementById(‘total_count‘).innerHTML = totalCount;
    };

    // 点击页码（首页、上一页、下一页、末页、数字页）
    document.getElementById(‘page_ul‘).addEventListener(‘click‘, function (e) {
        var _this = e.target;   //当前被点击的a标签
        var idAttr = _this.id;  //id属性
        var className = _this.className;    //class属性
        if(idAttr == ‘first_page‘){ //如果是点击的首页
            that.pageIndex = 1;
        }else if(idAttr == ‘prev_page‘){    //如果点击的是上一页
            that.pageIndex = that.pageIndex == 1 ? that.pageIndex : that.pageIndex - 1 ;
        }else if(idAttr == ‘next_page‘){ //如果点击的是下一页
            that.pageIndex = that.pageIndex == that.totalPage ? that.pageIndex : parseInt(that.pageIndex) + 1;
        }else if(idAttr == ‘last_page‘){ //如果点击的是末页
            that.pageIndex = that.totalPage;
        }else if(className == ‘page-number‘){   //如果点击的是数字页码
            that.pageIndex = _this.innerText;
        }
        callback && callback(that.pageIndex, that.pageSize);
    });

    // 改变每页条数
    document.getElementById(‘page_size‘).addEventListener(‘change‘, function () {
        var _this = this;
        that.pageIndex = paramsObj.pageIndex = 1;
        that.pageSize = paramsObj.pageSize = _this.value - 0;
        callback && callback(that.pageIndex, that.pageSize);
    })
}

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>js版分页插件</title>
    <style>
        .data {
            width: 70%;
            margin: 0 auto;
        }
        .params {
            margin: 20px 0;
        }
        .params input {
            height: 30px;
            box-sizing: border-box;
        }
        .params .search-btn {
            float: right;
            width: 80px;
            border: 0 none;
            background-color: #666;
            color: #fff;
            font-size: 14px;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            text-align: center;
        }
        th, td {
            border: 1px solid #999;
            height: 26px;
            line-height: 26px;
        }
        .no-data {
            display: block;
            height: 80px;
            line-height: 80px;
            text-align: center;
            color: #aaa;
        }
    </style>
</head>
<body>
    <div class="data">
        <div class="params">
            <label for="course_id">课程ID：</label><input type="text" id="course_id" value="536">
            <input type="button" value="查询" class="search-btn" id="search_btn">
        </div>
        <table>
            <thead>
                <tr>
                    <th>序号</th>
                    <th>课程ID</th>
                    <th>昵称</th>
                    <th>创建时间</th>
                </tr>
            </thead>
            <tbody id="data_list"></tbody>
        </table>
        <div class="no-data">未查询到数据</div>

        <!-- 分页结构 -->
        <div class="page">
            <div class="page-l" id="page_l" style="float: left;">
                <span>总共 <span id="total_count"></span> 条</span>
                <div class="page-size-box">
                    <span>每页显示</span>
                    <select id="page_size">
                        <option value="10">10</option>
                        <option value="20">20</option>
                        <option value="50">50</option>
                        <option value="100">100</option>
                    </select>条
                </div>
            </div>
            <div class="page-r">
                <ul id="page_ul" class="page-ul"></ul>
            </div>
        </div>
    </div>

    <script src="jquery.js"></script>
    <script src="paging.js"></script>
    <script>
        $(function () {

            //分页参数（参数名固定不可变）
            var pageConfig = {
                pageSize: 10,                //每页条数（不设置时，默认为10）
                prevPage: ‘上页‘,             //上一页（不设置时，默认为：<）
                nextPage: ‘下页‘,             //下一页（不设置时，默认为：>）
                firstPage: ‘首页‘,            //首页（不设置时，默认为：<<）
                lastPage: ‘末页‘,             //末页（不设置时，默认为：>>）
                degeCount: 4,                //当前页前后两边可显示的页码个数（不设置时，默认为3）
                ellipsis: true               //是否显示省略号按钮(不可点击)（true:显示，false:不显示，不设置时，默认为显示）
            }
            getList();  //初始加载就查询

            //点击查询按钮
            $(‘#search_btn‘).click(function () {
                getList();
            })

            //查询列表数据
            function getList() {
                var courseId = $(‘#course_id‘).val();
                //初始化Paging实例(pageConfig参数也可以为空对象，此时就是默认设置)
                var pageIng = new Paging(pageConfig, function (pageIndex, pageSize) {
                    $.ajax({
                        url: ‘http://******‘,　　//接口地址隐藏
                        type: ‘get‘,
                        data: {
                            page: pageIndex,
                            pageSize: pageSize,
                            course_id: courseId
                        },
                        headers: {Authorization: ‘******‘},　　//请求头信息隐藏
                        success: function (res) {
                            if(res.success){
                                if(res.data.list.length > 0){  //如果查询到了数据
                                    $(‘.page‘).show();
                                    $(‘.no-data‘).hide();
                                    var dataList = res.data.list;
                                    var html = ‘‘
                                    dataList.forEach(function (item, i) {
                                        html += ‘<tr>‘+
                                                    ‘<td style="width: 20%;">‘+((pageIndex-1)*pageSize+i+1)+‘</td>‘+
                                                    ‘<td style="width: 20%;">‘+item.id+‘</td>‘+
                                                    ‘<td style="width: 30%;">‘+item.nickname+‘</td>‘+
                                                    ‘<td style="width: 30%;">‘+item.create_time+‘</td>‘+
                                                ‘</tr>‘;
                                    });
                                    $(‘#data_list‘).html(html);
                                    var totalCount = res.data.totalCount;   //接口返回的总条数
                                    var totalPage = Math.ceil(totalCount / pageSize);   //根据总条数和每页条数计算总页码数

                                    // 调用Paging实例的 initPage()方法生成分页DOM结构
                                    pageIng.initPage(totalCount, totalPage, pageIndex);
                                }else{  //如果未查询到数据
                                    $(‘#data_list‘).html(‘‘);
                                    $(‘.page‘).hide();
                                    $(‘.no-data‘).show();
                                }
                            }else{
                                $(‘#data_list‘).html(‘‘);
                                $(‘.page‘).hide();
                                $(‘.no-data‘).show();
                            }
                        }
                    })
                });
            }
        })
  
    </script>
</body>
</html>