Twitter bootstrap fixed table header using jQuery

README.txt

Here is a simple jQuery plugin to make a table header fixed on top when window is scrolled.
Using the code from twitter bootstrap documentation page, this code is customized for table header.

Create the table with following layout -
<table class="table-fixed-header">
  <thead class="header">
    <tr>
      <th>Column 1</th>
      <th>Column 2</th>
      <th>Column 3</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Data Column 1</td>
      <td>Data Column 2</td>
      <td>Data Column 3</td>
    </tr>
    ...
  </tbody>
</table>

Add the css from the file "table-fixed-header.css"

To apply it to above table, call -
$('.table-fixed-header').fixedHeader();

It can take two parameters -
bgColor   - background color of the fixed header
topOffset - offset from top of windows where the fixed-header will be positioned (default is 40)
            If you use any other value for topOffset, update the "top" parameter CSS as well accordingly. 

For example, if there is no fixed navbar, you can set topOffset to 0 -
$('.table-fixed-header').fixedHeader({topOffset: 0});
Also update the CSS to - top: 0;

fiddle.css

table .header-fixed {
  position: fixed;
  top: 40px;
  z-index: 1020; /* 10 less than .navbar-fixed to prevent any overlap */
  border-bottom: 1px solid #d5d5d5;
  -webkit-border-radius: 0;
     -moz-border-radius: 0;
          border-radius: 0;
  -webkit-box-shadow: inset 0 1px 0 #fff, 0 1px 5px rgba(0,0,0,.1);
     -moz-box-shadow: inset 0 1px 0 #fff, 0 1px 5px rgba(0,0,0,.1);
          box-shadow: inset 0 1px 0 #fff, 0 1px 5px rgba(0,0,0,.1);
  filter: progid:DXImageTransform.Microsoft.gradient(enabled=false); /* IE6-9 */
}

fiddle.fixed-header.js

(function($) {

$.fn.fixedHeader = function (options) {
 var config = {
   topOffset: 40,
   bgColor: '#EEEEEE'
 };
 if (options){ $.extend(config, options); }

 return this.each( function() {
  var o = $(this);

  var $win = $(window)
    , $head = $('thead.header', o)
    , isFixed = 0;
  var headTop = $head.length && $head.offset().top - config.topOffset;

  function processScroll() {
    if (!o.is(':visible')) return;
    var i, scrollTop = $win.scrollTop();
    var t = $head.length && $head.offset().top - config.topOffset;
    if (!isFixed && headTop != t) { headTop = t; }
    if      (scrollTop >= headTop && !isFixed) { isFixed = 1; }
    else if (scrollTop <= headTop && isFixed) { isFixed = 0; }
    isFixed ? $('thead.header-copy', o).removeClass('hide')
            : $('thead.header-copy', o).addClass('hide');
  }
  $win.on('scroll', processScroll);

  // hack sad times - holdover until rewrite for 2.1
  $head.on('click', function () {
    if (!isFixed) setTimeout(function () {  $win.scrollTop($win.scrollTop() - 47) }, 10);
  })

  $head.clone().removeClass('header').addClass('header-copy header-fixed').appendTo(o);
  var ww = [];
  o.find('thead.header > tr:first > th').each(function (i, h){
    ww.push($(h).width());
  });
  $.each(ww, function (i, w){
    o.find('thead.header > tr > th:eq('+i+'), thead.header-copy > tr > th:eq('+i+')').css({width: w});
  });

  o.find('thead.header-copy').css({ margin:'0 auto',
                                    width: o.width(),
                                   'background-color':config.bgColor });
  processScroll();
 });
};

})(jQuery);

fiddle.html

  <div class="container">
    <h2 id="mynav">link | link | link</h2>
    <h1>Table Fixed Header</h1>
    <table id="mytable" class="table table-bordered table-striped table-fixed-header">
      <thead class="header">
        <tr>
          <th>Column 1</th>
          <th>Column 2</th>
          <th>Column 3</th>
        </tr>
      </thead>
      <tbody>
        <tr>
          <td>Data Column 1</td>
          <td>Data Column 2</td>
          <td>Data Column 3</td>
        </tr>
      </tbody>
    </table>
    <h1>Another table</h1>
    <table id="mytable2" class="table table-bordered table-striped table-fixed-header">
      <thead class="header">
        <tr style="color:#00f;">
          <th>Column 11</th>
          <th>Column 22</th>
          <th>Column 33</th>
          <th>Column 44</th>
        </tr>
      </thead>
      <tbody>
        <tr>
          <td>Data Column 11</td>
          <td>Data Column 22</td>
          <td>Data Column 33</td>
          <td>Data Column 44</td>
        </tr>
      </tbody>
    </table>
  </div>

fiddle.js

$(document).ready(function(){
      // add 30 more rows to the table
      var row = $('table#mytable > tbody > tr:first');
      var row2 = $('table#mytable2 > tbody > tr:first');
      for (i=0; i<30; i++) {
        $('table#mytable > tbody').append(row.clone());
        $('table#mytable2 > tbody').append(row2.clone());
      }

      // make the header fixed on scroll
      $('.table-fixed-header').fixedHeader();
});

fiddle.manifest

name: Twitter Bootstrap jsFiddle demo
authors:
  - i-scorpion
  - rubysolo (Solomon White)
resources:
  - https://gist.github.com/raw/3947002/93e1c70ca0c55b39c4ff40ef2ad6004fe7448d8c/fiddle.fixed-header.js
  - https://gist.github.com/raw/3947002/d908e48bcab3d31715e5bd081a92b9b8bc3f6b9e/fiddle.mynav.css
  - http://twitter.github.com/bootstrap/assets/css/bootstrap.css
normalize_css: no

fiddle.mynav.css

#mynav {
   top: 0;
   position: fixed;
   left: 0;
   right: 0;
   margin: 0 auto;
   z-index: 1030;
   height:40px;
   color:#fff;
   background-color:#666;
   text-align: center;
 }
 body { padding-top:60px; }