How to make fixed header table with table and cell width in percents in CSS?

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I have found the following solution for fixed header table:

table {   width: 450px;   border-collapse: collapse; }  thead {   display: block;   width: 450px;   overflow: auto;   color: #fff;   background: #000; }  tbody {   display: block;   width: 450px;   height: 200px;   background: pink;   overflow: auto; }  th, td {   padding: 0;   text-align: left;   vertical-align: top;   border-left: 1px solid #fff; }
<table>   <thead>     <tr>       <th style="width:200px">Header 1</th>       <th style="width:200px">Header 2</th>     </tr>   </thead>   <tbody>     <tr>       <td style="width:200px">Cell 1, Row 1</td>       <td style="width:200px">Cell 2, Row 1</td>     </tr>     <tr>       <td>Cell 1, Row 2</td>       <td>Cell 2, Row 2</td>     </tr>     <tr>       <td>Cell 1, Row 3</td>       <td>Cell 2, Row 3</td>     </tr>     <tr>       <td>Cell 1, Row 4</td>       <td>Cell 2, Row 4</td>     </tr>     <tr>       <td>Cell 1, Row 5</td>       <td>Cell 2, Row 5</td>     </tr>     <tr>       <td>Cell 1, Row 6</td>       <td>Cell 2, Row 6</td>     </tr>     <tr>       <td>Cell 1, Row 7</td>       <td>Cell 2, Row 7</td>     </tr>     <tr>       <td>Cell 1, Row 8</td>       <td>Cell 2, Row 8</td>     </tr>     <tr>       <td>Cell 1, Row 9</td>       <td>Cell 2, Row 9</td>     </tr>     <tr>       <td>Cell 1, Row 10</td>       <td>Cell 2, Row 10</td>     </tr>     <tr>       <td>Cell 1, Row 11</td>       <td>Cell 2, Row 11</td>     </tr>     <tr>       <td>Cell 1, Row 12</td>       <td>Cell 2, Row 12</td>     </tr>   </tbody> </table>

The problem with this solution is that it sets fixed width both for table and cells in pixels. However, I need <table style="width:100%"> and <td style="width:X%">. How to make fixed header table with table and cell width in percents in CSS using only one html table and without JS?


Check this solution posted on a different question. Fixed Header solution.

Or directly try out this Fiddle

The header content is placed inside a "div" in the "th". This div has position absolute and other styling to show the header as fixed.

html, body{   margin:0;   padding:0;   height:100%; } section {   position: relative;   border: 1px solid #000;   padding-top: 37px;   background: #500; } section.positioned {   position: absolute;   top:100px;   left:100px;   width:800px;   box-shadow: 0 0 15px #333; } .container {   overflow-y: auto;   height: 200px; } table {   border-spacing: 0;   width:100%; } td + td {   border-left:1px solid #eee; } td, th {   border-bottom:1px solid #eee;   background: #ddd;   color: #000;   padding: 10px 25px; } th {   height: 0;   line-height: 0;   padding-top: 0;   padding-bottom: 0;   color: transparent;   border: none;   white-space: nowrap; } th div{   position: absolute;   background: transparent;   color: #fff;   padding: 9px 25px;   top: 0;   margin-left: -25px;   line-height: normal;   border-left: 1px solid #800; } th:first-child div{   border: none; }
<section class="">   <div class="container">     <table>       <thead>         <tr class="header">           <th>             Table attribute name             <div>Table attribute name</div>           </th>           <th>             Value             <div>Value</div>           </th>           <th>             Description             <div>Description</div>           </th>         </tr>       </thead>       <tbody>         <tr>           <td>align</td>           <td>left, center, right</td>           <td>Not supported in HTML5. Deprecated in HTML 4.01. Specifies the alignment of a table according to surrounding text</td>         </tr>         <tr>           <td>bgcolor</td>           <td>rgb(x,x,x), #xxxxxx, colorname</td>           <td>Not supported in HTML5. Deprecated in HTML 4.01. Specifies the background color for a table</td>         </tr>         <tr>           <td>border</td>           <td>1,""</td>           <td>Specifies whether the table cells should have borders or not</td>         </tr>         <tr>           <td>cellpadding</td>           <td>pixels</td>           <td>Not supported in HTML5. Specifies the space between the cell wall and the cell content</td>         </tr>         <tr>           <td>cellspacing</td>           <td>pixels</td>           <td>Not supported in HTML5. Specifies the space between cells</td>         </tr>         <tr>           <td>frame</td>           <td>void, above, below, hsides, lhs, rhs, vsides, box, border</td>           <td>Not supported in HTML5. Specifies which parts of the outside borders that should be visible</td>         </tr>         <tr>           <td>rules</td>           <td>none, groups, rows, cols, all</td>           <td>Not supported in HTML5. Specifies which parts of the inside borders that should be visible</td>         </tr>         <tr>           <td>summary</td>           <td>text</td>           <td>Not supported in HTML5. Specifies a summary of the content of a table</td>         </tr>         <tr>           <td>width</td>           <td>pixels, %</td>           <td>Not supported in HTML5. Specifies the width of a table</td>         </tr>       </tbody>     </table>   </div> </section>

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