Implementing simple paging control based on jquery

Implementing simple paging control based on jquery_jquery

WBOY

Release： 2016-05-16 15:10:34

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There are many front-end paging controls. Here I share my paging control pagination.js version 1.0. This control is based on jquery.

Let’s take a look at the preview first:

By default, clicking on the page number will add "#p page number" after the URL just like the blog park.

The control has 2 parameters that need attention:

1. beforeRender: Will be called before each page number item is rendered, and the parameter is the jQuery object of the page number. At this time we can do some processing before rendering, such as adding our own attributes, etc. By default, clicking on the page number will add "#p page number" after the URL. Such URL will not refresh the page. If we need to refresh the page, for example, the url is, "default.aspx?index=page number", we can handle it in this callback function.

2. callback: Triggered by clicking on the page number, the parameter is the entire options. Clicking on the page number will not initiate an ajax request and needs to be handled by yourself. options.index is the page number clicked this time. Sometimes our total number may change, and the callback can return the options parameter. Here we just need to reset the total number and then return.

You can understand it by looking at the calling example.

Source code:

/*分页控件v1.0
 date:2015.08.26
*/
(function(window,$){
  $.fn.pagination = function(options){
    var _dftOpts = {
      count:0,//总数
      size:10,//每页数量
      index:1,//当前页
      lrCount:5,//当前页左右最多显示的数量
      lCount:0,//最开始预留的数量
      rCount:0,//最后预留的数量
      first:"首页",
      last:"尾页",
      before:"上一页",
      next:"下一页",     
      callback:null,//点击事件
      beforeRender:null//项呈现前
    };
    $.extend(_dftOpts,options);
    var count = _dftOpts.count;
    if(count <= 0) return;
    var _ellipsis = "...";
    var _size = _dftOpts.size > 0 &#63; (_dftOpts.size > count &#63; count : _dftOpts.size) : 1;
    var _page = Math.ceil(count / _size);
    var _index = _dftOpts.index > 0 &#63; (_dftOpts.index > _page &#63; _page : _dftOpts.index) : 1;
    var _lrcount = _dftOpts.lrCount * 2 + 1 > _page &#63; parseInt((_page - 1) / 2) : _dftOpts.lrCount;    
    var _continueCount = _lrcount * 2 + 1;
    var _lCount = _dftOpts.lCount <= 0 &#63; 0 : (_dftOpts.lCount > _page &#63; _page - 1 : _dftOpts.lCount);
    var _rCount = _dftOpts.rCount <= 0 &#63; 0 : (_dftOpts.rCount > _page &#63; _page - 1 : _dftOpts.rCount);
    var _first = _dftOpts.first;
    var _before = _dftOpts.before;
    var _last = _dftOpts.last;
    var _next = _dftOpts.next;
    var _FromTo;
    var _url = location.pathname + location.search + "#p";
    var jthis = this;
    var jPager = $("<div>",{"class":"pager"});    
    initJPager();    
    jthis.append(jPager);
    regisiterEvent();
    return jthis;
     
    /*function*/    
    function initJPager(){
      _FromTo = GetFromTo();
      var from = _FromTo.from;
      var to = _FromTo.to;
      var before = _index <= 1 &#63; 1 : _index - 1;
      var next = _index >= _page &#63; _page : _index + 1;
      var beforeLast = _page - 1;
      var jPrevs,jNexts;
      var i;
          
      //前   
      if(from === 2 && _lCount > 0){
        appendLink(1);
      }else if(from > _lCount + 1){
        for(i = 0;i < _lCount;i++){
          appendLink(i + 1);          
        }
        if(_lCount > 0){
          appendEllipsis();
        }
      }else{        
        for(i = 1;i < from;i++){
          appendLink(i);
        }
      }
       
      //连续部分
      for(i = from;i <= to;i++){
        if(i === _index){              
          appendLink(i,true);
        }else{
          appendLink(i);
        }
      }
       
      //后
      if(to === beforeLast && _rCount > 0){      
        appendLink(_page);
      }else if(to < _page - _rCount){
        if(_rCount > 0){
          appendEllipsis();
        }
        for(i = _page - _rCount;i < _page;i++){
          appendLink(i + 1);
        }
      }else{
        for(i = to;i < _page;i++){
          appendLink(i + 1);
        }
      }
       
      appendFirstAndLast();
    }
    function GetFromTo(){
      var from,to;
      from = _index - _lrcount;
      if(from <= 1){
        return {from:1,to:_continueCount};
      }
      if(_page - _index < _lrcount){
        from = _page - _continueCount + 1;        
        return {from:from,to:_page};
      }
      to = _index + _lrcount;
      to = to > _page &#63; _page : to;    
      return {from:from,to:to};      
    }    
    function appendLink(index,active){
      var jA = $("<a>",{text:index,href:_url+index});
      if(active){
        jA.addClass("active");
      }
      if(_dftOpts.beforeRender){
        _dftOpts.beforeRender(jA);
      }
      jPager.append(jA);
    }
    function appendFirstAndLast(){
      var jFirst = $("<a>",{text:_first});
      var jBefore = $("<a>",{text:_before});
      var jLast = $("<a>",{text:_last});
      var jNext = $("<a>",{text:_next});
      jPager.append(jNext).append(jLast);
      jBefore.insertBefore(jPager.find("a").first());
      jFirst.insertBefore(jBefore);
      if(_index === 1){
        jFirst.addClass("disabled");
        jBefore.addClass("disabled");
      }else{
        jFirst.attr("href",_url+1);
        jBefore.attr("href",_url+(_index-1));
      }
      if(_index === _page){
        jLast.addClass("disabled");
        jNext.addClass("disabled");
      }else{
        jLast.attr("href",_url+_page);          
        jNext.attr("href",_url+(_index+1));
      }     
    }
    function appendEllipsis(){
      jPager.append(_ellipsis);
    }
    //event
    function regisiterEvent(){
      jPager.on("mouseenter","a",function(){
        var jthis = $(this);
        if(!jthis.hasClass("active") && !jthis.hasClass("disabled")){
          jthis.addClass("hover");
        }
      }).on("mouseout","a",function(){
        var jthis = $(this);
        if(!jthis.hasClass("active")){
          jthis.removeClass("hover");
        }
      }).on("click","a",function(){
        var jItem = $(this);
        if(jItem.hasClass("disabled")){
          return;
        }
        var text = jItem.text();
        var index = 0;
        switch(text){
          case _first:
            index = 1;
            break;
          case _before:
            index = _index - 1;
            break;
          case _last:
            index = _page;
            break;
          case _next:
            index = _index + 1;
            break;
          default:
            index = parseInt(text);
            break;
        }        
        var callback = _dftOpts.callback;
        var newOpts;
        _dftOpts.index = index;
        jPager.remove();
        if(callback){
          newOpts = callback(_dftOpts);
        }
        if(newOpts){
          _dftOpts = newOpts;
        }
        jthis.pagination(_dftOpts);        
      });           
    }
  }
})(window,$);

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Style:

The style is very simple and you can adjust it yourself.

.pager{height:30px;line-height:30px;font-size: 12px;margin: 25px 0px;text-align: center;color: #2E6AB1;overflow: hidden;}
.pager a{border:1px solid #9AAFE5;color:#2E6AB1;margin:0px 5px;padding:5px 8px;text-decoration: none;}
.pager a.hover,.pager a.active{background-color:#2E6AB1;border-color:#000080;color:#FFF;}
.pager a.disabled{color:#C8CDD2;cursor:auto;}

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Usage example:

$(".div1").pagination({
   count:200,
   size:10,
   index:1,
   lrCount:3,
   lCount:1,
   rCount:1,     
   callback:function(options){
     //alert(options.index);     
     //options.count = 300;
     //return options;
   },
   beforeRender:function(jA){
     //jA.attr("href","default.aspx&#63;index="+jA.text());
   }  
 });

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pagination.js 1.0 may still have some shortcomings and bugs, and I will correct them in time.

The above is the entire content of this article, I hope it will be helpful to everyone’s study.