js实现页面分页效果

本文介绍如何使用原生JavaScript实现一个简单的分页功能,包括生成页码、页面切换和响应onchange事件等关键步骤。

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最近接触老项目,项目要求修改表格添加分页功能,采用的bootstrap-table,在完成项目后,决定原生简单实现一下分页效果。

效果:

首先,分页最重要的几个参数:

  1. 每页显示条数:pageSize
  2. 总数据量:data;                                                 
  3. 总共多少页:totalpages= (data-1)/pageSize+1 

然后,就是根据总页数生成分页

 var str= '';
for (var i = 1; i <= totalpages; i++) {
           str+='<li>'+i+'</li>'
       }
 bBtn.innerHTML=str;


再就是点击页码的事件:

var aLi = bBtn.getElementsByTagName("li");
        for (var i = 0; i <= totalpages - 1; i++) {
            aLi[i].index = i;
            aLi[0].style.background = "#fff000";
            aLi[i].style.left = i * 40 + "px";
            //点击页码做3件事
            aLi[i].onclick = function() {
                b = this.index;
                // 1.当前页码active(简单功能)
                for (var j = 0; j < aLi.length; j++) {
                    aLi[j].style.background = "#00ff00";
                }
                this.style.background = "#fff000";
                //2.页面切换
                for (var j = 0; j < oLi.length; j++) {//点击第b页,先让 所有页面隐藏
                    oLi[j].style.display = "none";
                }
                var a=0;
                //判断是否为最后一条数据
                b ==(totalpages-1) ?  a=oLi.length :   a=(b+1)*pageSize;
                for (var j = (b * pageSize); j <a; j++) {//每页显示条数:第一条 b * 10条 至 每页最后一条数据()(重难点)
                    oLi[j].style.display = "block";
                }
            }
        }

然后就是监听onchange事件,进行页码之间的切换,附上代码


<style>
ol,ul,li {
    list-style:none;
}
.box {
    width:550px;height:500px;position:relative; margin:20px auto;
}
#conten {
    width:500px;height:410px;   border:1px solid #ccc;overflow:auto; margin: 0 auto;
}
#conten li {
    width:100%;height:40px;border-bottom:1px solid #ff0000;text-align: center;
}
#btn {
    width:180px;height:30px;margin:20px auto;padding:5px 10px;position:relative;
}
#btn  li{
    width:30px; height:30px; background:#00ff00; margin:0 5px;display: inline-block;position:absolute; transition:left 0.5s;text-align:center;
 }
.pageList{
    height: 100px;display: flex;justify-content: space-around;align-items: center;
}
select{
    width: 40px;
}
</style>
</head>
<body>
<div class="box">
    <ul id="conten">//这是要分页的内容</ul>
    <div class="pageList">
        <p>共<span class="pageNumber"></span>条记录</p>
        <p>每页显示<select>
            <option value="5">5</option>
            <option value="10">10</option>
            <option value="15">15</option>
        </select>>条记录</p>
        <ul id="btn"></ul>
    </div> 
</div>
<script>
window.onload = function() {
    var oConten = document.getElementById("conten");
    var oLi = oConten.getElementsByTagName("li");
    var bBtn = document.getElementById("btn");
    var num=document.getElementsByClassName('pageNumber')[0];
    var oSelect=document.getElementsByTagName('select')[0];
    var pageSize=0;
    var str= '';
    oSelect.onchange=function(){
        pageSize=oSelect.value; 
        var totalpages = parseInt((oLi.length-1)/pageSize+1)//页面数量()
        num.innerHTML=oLi.length;
        num.style.color="#00ff00"
        //添加页码标签(几个页面就添加几个页码)
        for (var i = 1; i <= totalpages; i++) {
           str+='<li>'+i+'</li>'
        }
        bBtn.innerHTML=str;
        str='';
        var aLi = bBtn.getElementsByTagName("li");
        for (var i = 0; i <= totalpages - 1; i++) {
            aLi[i].index = i;
            aLi[0].style.background = "#fff000";
            aLi[i].style.left = i * 40 + "px";
            //点击页码做3件事
            aLi[i].onclick = function() {
                b = this.index;
                // 1.当前页码active(简单功能)
                for (var j = 0; j < aLi.length; j++) {
                    aLi[j].style.background = "#00ff00";
                }
                this.style.background = "#fff000";
                //2.页面切换
                for (var j = 0; j < oLi.length; j++) {//点击第b页,先让 所有页面隐藏
                    oLi[j].style.display = "none";
                }
                var a=0;
                //判断是否为最后一条数据
                b ==(totalpages-1) ?  a=oLi.length :   a=(b+1)*pageSize;
                for (var j = (b * pageSize); j <a; j++) {//每页显示条数:第一条 b * 10条 至 每页最后一条数据()(重难点)
                    oLi[j].style.display = "block";
                }
            }
        }
        aLi[0].onclick(); //切换每页显示条数时默认显示第一个页码
    }
    oSelect.onchange(); //页面加载时,默认触发一次onchange事件
}
</script>

 

<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <meta name="Copyright" content="懒人图库 http://www.makewing.com/" /> <meta name="description" content="学会偷懒,并懒出境界是提高工作效率最有效的方法!" /> <meta content="懒人图库" name="keywords" /> <title>懒人图库</title> <style> body {font-size: 12px;} /* Pages Main Tyle */ .pages { color: #000000; cursor: default; font-size: 10px; font-family: Tahoma, Verdana; padding: 3px 0px 3px 0px; } .pages .count, .pages .number, .pages .arrow { color: #000000; font-size: 10px; background-color: #F7F7F7; border: 1px solid #CCCCCC; } /* Page and PageCount Style */ .pages .count { font-weight: bold; border-right: none; padding: 2px 10px 1px 10px; } /* Mode 0,1,2 Style (Number) */ .pages .number { font-weight: normal; padding: 2px 10px 1px 10px; } .pages .number a, .pages .number span { font-size: 10px; } .pages .number span { color: #999999; margin: 0px 3px 0px 3px; } .pages .number a { color: #000000; text-decoration: none; } .pages .number a:hover { color: #0000ff; } /* Mode 3 Style (Arrow) */ .pages .arrow { font-weight: normal; padding: 0px 5px 0px 5px; } .pages .arrow a, .pages .arrow span { font-size: 10px; font-family: Webdings; } .pages .arrow span { color: #999999; margin: 0px 5px 0px 5px; } .pages .arrow a { color: #000000; text-decoration: none; } .pages .arrow a:hover { color: #0000ff; } /* Mode 4 Style (Select) */ .pages select, .pages input { color: #000000; font-size: 10px; font-family: Tahoma, Verdana; } /* Mode 5 Style (Input) */ .pages .input input.ititle, .pages .input input.itext, .pages .input input.icount { color: #666666; font-weight: bold; background-color: #F7F7F7; border: 1px solid #CCCCCC; } .pages .input input.ititle { width: 70px; text-align: right; border-right: none; } .pages .input input.itext { width: 25px; color: #000000; text-align: right; border-left: none; border-right: none; } .pages .input input.icount { width: 35px; text-align: left; border-left: none; } .pages .input input.ibutton { height: 17px; color: #FFFFFF; font-weight: bold; font-family: Verdana; background-color: #999999; border: 1px solid #666666; padding: 0px 0px 2px 1px; margin-left: 2px; cursor: hand; } </style> <script language="JavaScript"> <!-- /* showPages v1.1 ================================= Infomation ---------------------- Author : Lapuasi E-Mail : lapuasi@gmail.com Web : http://www.lapuasi.com Date : 2005-11-17 Example ---------------------- var pg = new showPages('pg'); pg.pageCount = 12; //定义总页数(必要) pg.argName = 'p'; //定义参数名(可选,缺省为page) pg.printHtml(); //显示页数 Supported in Internet Explorer, Mozilla Firefox */ function showPages(name) { //初始化属性 this.name = name; //对象名称 this.page = 1; //当前页数 this.pageCount = 1; //总页数 this.argName = 'page'; //参数名 this.showTimes = 1; //打印次数 } showPages.prototype.getPage = function(){ //丛url获得当前页数,如果变量重复只获取最后一个 var args = location.search; var reg = new RegExp('[\?&]?' + this.argName + '=([^&]*)[&$]?', 'gi'); var chk = args.match(reg); this.page = RegExp.$1; } showPages.prototype.checkPages = function(){ //进行当前页数和总页数的验证 if (isNaN(parseInt(this.page))) this.page = 1; if (isNaN(parseInt(this.pageCount))) this.pageCount = 1; if (this.page < 1) this.page = 1; if (this.pageCount < 1) this.pageCount = 1; if (this.page > this.pageCount) this.page = this.pageCount; this.page = parseInt(this.page); this.pageCount = parseInt(this.pageCount); } showPages.prototype.createHtml = function(mode){ //生成html代码 var strHtml = '', prevPage = this.page - 1, nextPage = this.page + 1; if (mode == '' || typeof(mode) == 'undefined') mode = 0; switch (mode) { case 0 : //模式1 (页数,首页,前页,后页,尾页) strHtml += '<span class="count">Pages: ' + this.page + ' / ' + this.pageCount + '</span>'; strHtml += '<span class="number">'; if (prevPage < 1) { strHtml += '<span title="First Page">?</span>'; strHtml += '<span title="Prev Page">?</span>'; } else { strHtml += '<span title="First Page"><a href="javascript:' + this.name + '.toPage(1);">?</a></span>'; strHtml += '<span title="Prev Page"><a href="javascript:' + this.name + '.toPage(' + prevPage + ');">?</a></span>'; } for (var i = 1; i <= this.pageCount; i++) { if (i > 0) { if (i == this.page) { strHtml += '<span title="Page ' + i + '">[' + i + ']</span>'; } else { strHtml += '<span title="Page ' + i + '"><a href="javascript:' + this.name + '.toPage(' + i + ');">[' + i + ']</a></span>'; } } } if (nextPage > this.pageCount) { strHtml += '<span title="Next Page">?</span>'; strHtml += '<span title="Last Page">?</span>'; } else { strHtml += '<span title="Next Page"><a href="javascript:' + this.name + '.toPage(' + nextPage + ');">?</a></span>'; strHtml += '<span title="Last Page"><a href="javascript:' + this.name + '.toPage(' + this.pageCount + ');">?</a></span>'; } strHtml += '</span><br />'; break; case 1 : //模式1 (10页缩略,首页,前页,后页,尾页) strHtml += '<span class="count">Pages: ' + this.page + ' / ' + this.pageCount + '</span>'; strHtml += '<span class="number">'; if (prevPage < 1) { strHtml += '<span title="First Page">?</span>'; strHtml += '<span title="Prev Page">?</span>'; } else { strHtml += '<span title="First Page"><a href="javascript:' + this.name + '.toPage(1);">?</a></span>'; strHtml += '<span title="Prev Page"><a href="javascript:' + this.name + '.toPage(' + prevPage + ');">?</a></span>'; } if (this.page % 10 ==0) { var startPage = this.page - 9; } else { var startPage = this.page - this.page % 10 + 1; } if (startPage > 10) strHtml += '<span title="Prev 10 Pages"><a href="javascript:' + this.name + '.toPage(' + (startPage - 1) + ');">...</a></span>'; for (var i = startPage; i < startPage + 10; i++) { if (i > this.pageCount) break; if (i == this.page) { strHtml += '<span title="Page ' + i + '">[' + i + ']</span>'; } else { strHtml += '<span title="Page ' + i + '"><a href="javascript:' + this.name + '.toPage(' + i + ');">[' + i + ']</a></span>'; } } if (this.pageCount >= startPage + 10) strHtml += '<span title="Next 10 Pages"><a href="javascript:' + this.name + '.toPage(' + (startPage + 10) + ');">...</a></span>'; if (nextPage > this.pageCount) { strHtml += '<span title="Next Page">?</span>'; strHtml += '<span title="Last Page">?</span>'; } else { strHtml += '<span title="Next Page"><a href="javascript:' + this.name + '.toPage(' + nextPage + ');">?</a></span>'; strHtml += '<span title="Last Page"><a href="javascript:' + this.name + '.toPage(' + this.pageCount + ');">?</a></span>'; } strHtml += '</span><br />'; break; case 2 : //模式2 (前后缩略,页数,首页,前页,后页,尾页) strHtml += '<span class="count">Pages: ' + this.page + ' / ' + this.pageCount + '</span>'; strHtml += '<span class="number">'; if (prevPage < 1) { strHtml += '<span title="First Page">?</span>'; strHtml += '<span title="Prev Page">?</span>'; } else { strHtml += '<span title="First Page"><a href="javascript:' + this.name + '.toPage(1);">?</a></span>'; strHtml += '<span title="Prev Page"><a href="javascript:' + this.name + '.toPage(' + prevPage + ');">?</a></span>'; } if (this.page != 1) strHtml += '<span title="Page 1"><a href="javascript:' + this.name + '.toPage(1);">[1]</a></span>'; if (this.page >= 5) strHtml += '<span>...</span>'; if (this.pageCount > this.page + 2) { var endPage = this.page + 2; } else { var endPage = this.pageCount; } for (var i = this.page - 2; i <= endPage; i++) { if (i > 0) { if (i == this.page) { strHtml += '<span title="Page ' + i + '">[' + i + ']</span>'; } else { if (i != 1 && i != this.pageCount) { strHtml += '<span title="Page ' + i + '"><a href="javascript:' + this.name + '.toPage(' + i + ');">[' + i + ']</a></span>'; } } } } if (this.page + 3 < this.pageCount) strHtml += '<span>...</span>'; if (this.page != this.pageCount) strHtml += '<span title="Page ' + this.pageCount + '"><a href="javascript:' + this.name + '.toPage(' + this.pageCount + ');">[' + this.pageCount + ']</a></span>'; if (nextPage > this.pageCount) { strHtml += '<span title="Next Page">?</span>'; strHtml += '<span title="Last Page">?</span>'; } else { strHtml += '<span title="Next Page"><a href="javascript:' + this.name + '.toPage(' + nextPage + ');">?</a></span>'; strHtml += '<span title="Last Page"><a href="javascript:' + this.name + '.toPage(' + this.pageCount + ');">?</a></span>'; } strHtml += '</span><br />'; break; case 3 : //模式3 (箭头样式,首页,前页,后页,尾页) (only IE) strHtml += '<span class="count">Pages: ' + this.page + ' / ' + this.pageCount + '</span>'; strHtml += '<span class="arrow">'; if (prevPage < 1) { strHtml += '<span title="First Page">9</span>'; strHtml += '<span title="Prev Page">7</span>'; } else { strHtml += '<span title="First Page"><a href="javascript:' + this.name + '.toPage(1);">9</a></span>'; strHtml += '<span title="Prev Page"><a href="javascript:' + this.name + '.toPage(' + prevPage + ');">7</a></span>'; } if (nextPage > this.pageCount) { strHtml += '<span title="Next Page">8</span>'; strHtml += '<span title="Last Page">:</span>'; } else { strHtml += '<span title="Next Page"><a href="javascript:' + this.name + '.toPage(' + nextPage + ');">8</a></span>'; strHtml += '<span title="Last Page"><a href="javascript:' + this.name + '.toPage(' + this.pageCount + ');">:</a></span>'; } strHtml += '</span><br />'; break; case 4 : //模式4 (下拉框) if (this.pageCount < 1) { strHtml += '<select name="toPage" disabled>'; strHtml += '<option value="0">No Pages</option>'; } else { var chkSelect; strHtml += '<select name="toPage" onchange="' + this.name + '.toPage(this);">'; for (var i = 1; i <= this.pageCount; i++) { if (this.page == i) chkSelect=' selected="selected"'; else chkSelect=''; strHtml += '<option value="' + i + '"' + chkSelect + '>Pages: ' + i + ' / ' + this.pageCount + '</option>'; } } strHtml += '</select>'; break; case 5 : //模式5 (输入框) strHtml += '<span class="input">'; if (this.pageCount < 1) { strHtml += '<input type="text" name="toPage" value="No Pages" class="itext" disabled="disabled">'; strHtml += '<input type="button" name="go" value="GO" class="ibutton" disabled="disabled"></option>'; } else { strHtml += '<input type="text" value="Input Page:" class="ititle" readonly="readonly">'; strHtml += '<input type="text" id="pageInput' + this.showTimes + '" value="' + this.page + '" class="itext" title="Input page" onkeypress="return ' + this.name + '.formatInputPage(event);" onfocus="this.select()">'; strHtml += '<input type="text" value=" / ' + this.pageCount + '" class="icount" readonly="readonly">'; strHtml += '<input type="button" name="go" value="GO" class="ibutton" onclick="' + this.name + '.toPage(document.getElementById(\'pageInput' + this.showTimes + '\').value);"></option>'; } strHtml += '</span>'; break; default : strHtml = 'Javascript showPage Error: not find mode ' + mode; break; } return strHtml; } showPages.prototype.createUrl = function (page) { //生成页面跳转url if (isNaN(parseInt(page))) page = 1; if (page < 1) page = 1; if (page > this.pageCount) page = this.pageCount; var url = location.protocol + '//' + location.host + location.pathname; var args = location.search; var reg = new RegExp('([\?&]?)' + this.argName + '=[^&]*[&$]?', 'gi'); args = args.replace(reg,'$1'); if (args == '' || args == null) { args += '?' + this.argName + '=' + page; } else if (args.substr(args.length - 1,1) == '?' || args.substr(args.length - 1,1) == '&') { args += this.argName + '=' + page; } else { args += '&' + this.argName + '=' + page; } return url + args; } showPages.prototype.toPage = function(page){ //页面跳转 var turnTo = 1; if (typeof(page) == 'object') { turnTo = page.options[page.selectedIndex].value; } else { turnTo = page; } self.location.href = this.createUrl(turnTo); } showPages.prototype.printHtml = function(mode){ //显示html代码 this.getPage(); this.checkPages(); this.showTimes += 1; document.write('<div id="pages_' + this.name + '_' + this.showTimes + '" class="pages"></div>'); document.getElementById('pages_' + this.name + '_' + this.showTimes).innerHTML = this.createHtml(mode); } showPages.prototype.formatInputPage = function(e){ //限定输入页数格式 var ie = navigator.appName=="Microsoft Internet Explorer"?true:false; if(!ie) var key = e.which; else var key = event.keyCode; if (key == 8 || key == 46 || (key >= 48 && key <= 57)) return true; return false; } //--> </script> </head> <body> <p> <script language="JavaScript"> <!-- var pg = new showPages('pg'); pg.pageCount =12; // 定义总页数(必要) //pg.argName = 'p'; // 定义参数名(可选,默认为page) document.write('<br>Show Times: ' + pg.showTimes + ', Mood Default'); pg.printHtml(); document.write('<br>Show Times: ' + pg.showTimes + ', Mood 0'); pg.printHtml(0); document.write('<br>Show Times: ' + pg.showTimes + ', Mood 1'); pg.printHtml(1); document.write('<br>Show Times: ' + pg.showTimes + ', Mood 2'); pg.printHtml(2); document.write('<br>Show Times: ' + pg.showTimes + ', Mood 3 (only IE)'); pg.printHtml(3); document.write('<br>Show Times: ' + pg.showTimes + ', Mood 4'); pg.printHtml(4); document.write('<br>Show Times: ' + pg.showTimes + ', Mood 5'); pg.printHtml(5); //--> </script> </p> <p>查找更多代码,请访问:<a href="http://www.lanrentuku.com" target="_blank">懒人图库</a></p> </body> </html>
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