Table header to stay fixed at the top when user scrolls it out of view with jQuery

Question

I am trying to design an HTML table where the header will stay at the top of the page when AND ONLY when the user scrolls it out of view. For example, the table may be 500

Answer 1

In this solution fixed header is created dynamically, the content and style is cloned from THEAD

all you need is two lines for example:

var $myfixedHeader = $("#Ttodo").FixedHeader(); //create fixed header $(window).scroll($myfixedHeader.moveScroll); //bind function to scroll event

My jquery plugin FixedHeader and getStyleObject provided below you can to put in the file .js

// JAVASCRIPT



/*
 * getStyleObject Plugin for jQuery JavaScript Library
 * From: http://upshots.org/?p=112
 
Basic usage:
$.fn.copyCSS = function(source){
  var styles = $(source).getStyleObject();
  this.css(styles);
}
*/

(function($){
    $.fn.getStyleObject = function(){
        var dom = this.get(0);
        var style;
        var returns = {};
        if(window.getComputedStyle){
            var camelize = function(a,b){
                return b.toUpperCase();
            };
            style = window.getComputedStyle(dom, null);
            for(var i = 0, l = style.length; i < l; i++){
                var prop = style[i];
                var camel = prop.replace(/\-([a-z])/g, camelize);
                var val = style.getPropertyValue(prop);
                returns[camel] = val;
            };
            return returns;
        };
        if(style = dom.currentStyle){
            for(var prop in style){
                returns[prop] = style[prop];
            };
            return returns;
        };
        return this.css();
    }
})(jQuery);



   
//Floating Header of long table  PiotrC
(function ( $ ) {
    var tableTop,tableBottom,ClnH;
    $.fn.FixedHeader = function(){
        tableTop=this.offset().top,
        tableBottom=this.outerHeight()+tableTop;
        //Add Fixed header
        this.after('');
        //Clone Header
        ClnH=$("#fixH").html(this.find("thead").clone());
        //set style
        ClnH.css({'position':'fixed', 'top':'0', 'zIndex':'60', 'display':'none',
        'border-collapse': this.css('border-collapse'),
		'border-spacing': this.css('border-spacing'),
        'margin-left': this.css('margin-left'),
        'width': this.css('width')            
        });
        //rewrite style cell of header
        $.each(this.find("thead>tr>th"), function(ind,val){
            $(ClnH.find('tr>th')[ind]).css($(val).getStyleObject());
        });
    return ClnH;}
    
    $.fn.moveScroll=function(){
        var offset = $(window).scrollTop();
        if (offset > tableTop && offsettableBottom){
            if(!ClnH.is(':hidden'))ClnH.hide();
        }
    };
})( jQuery );





var $myfixedHeader = $("#repTb").FixedHeader();
$(window).scroll($myfixedHeader.moveScroll);

/* CSS - important only NOT transparent background */

#repTB{border-collapse: separate;border-spacing: 0;}

#repTb thead,#fixH thead{background: #e0e0e0 linear-gradient(#d8d8d8 0%, #e0e0e0 25%, #e0e0e0 75%, #d8d8d8 100%) repeat scroll 0 0;border:1px solid #CCCCCC;}

#repTb td{border:1px solid black}

example
 


Col1
Column2
Description

info
info
info
info
info
info
info
info
info
info
info
info
info
info
info
info
info
info
info
info
info
info
info
info
info
info
info
info
info
info
info
info
info