<table> with fixed <thead> and scrollable <tbody>

Chrome, FF, Edge
the simplest solution is to use th { position: sticky; top: 0; }

/* JUST COMMON TABLE STYLES... */
table { border-collapse: collapse; width: 100%; }
th, td { background: #fff; padding: 8px 16px; }


.tableFixHead {
  overflow: auto;
  height: 100px;
}

.tableFixHead thead th {
  position: sticky;
  top: 0;
}
<div class="tableFixHead">
  <table>
    <thead>
      <tr><th>TH 1</th><th>TH 2</th></tr>
    </thead>
    <tbody>
      <tr><td>A1</td><td>A2</td></tr>
      <tr><td>B1</td><td>B2</td></tr>
      <tr><td>C1</td><td>C2</td></tr>
      <tr><td>D1</td><td>D2</td></tr>
      <tr><td>E1</td><td>E2</td></tr>
    </tbody>
  </table>
</div>

IE11

To sloppily support IE11 (2.5% market share as of 10/2018), a bit jaggy but at least THs are on top - you could add this JavaScript:

function isIE() {
  return navigator.userAgent.indexOf('MSIE') > -1 || navigator.appVersion.indexOf('Trident/') > -1
}


if (isIE()) {

  // Fix table head
  function tableFixHead(ths) {
    var sT = this.scrollTop;
    [].forEach.call(ths, function(th) {
      th.style.transform = "translateY(" + sT + "px)";
    });
  }

  [].forEach.call(document.querySelectorAll(".tableFixHead"), function(el) {
    var ths = el.querySelectorAll("thead th");
    el.addEventListener("scroll", tableFixHead.bind(el, ths));
  });

}

which will (since IE ignores sticky position) use transform translateY to position the TH elements.

PS: the above JS (without the wrapping if statement) works pretty decently for all other evergreen browsers too - in case position: sticky; does not fits your needs...


This solution fulfills all 5 requirements:

table {
  width: 100%;
}

table, td {
  border-collapse: collapse;
  border: 1px solid #000;
}

thead {
  display: table; /* to take the same width as tr */
  width: calc(100% - 17px); /* - 17px because of the scrollbar width */
}

tbody {
  display: block; /* to enable vertical scrolling */
  max-height: 200px; /* e.g. */
  overflow-y: scroll; /* keeps the scrollbar even if it doesn't need it; display purpose */
}

th, td {
  width: 33.33%; /* to enable "word-break: break-all" */
  padding: 5px;
  word-break: break-all; /* 4. */
}

tr {
  display: table; /* display purpose; th's border */
  width: 100%;
  box-sizing: border-box; /* because of the border (Chrome needs this line, but not FF) */
}

td {
  text-align: center;
  border-bottom: none;
  border-left: none;
}
<table> 
  <thead> 
    <tr>
      <th>Table Header 1</th>
      <th>Table Header 2</th>
      <th>Table Header 3</th>
    </tr> 
  </thead>
  <tbody>
    <tr>
      <td>Data1111111111111111111111111</td>
      <td>Data</td>
      <td>Data</td>
    </tr>
    <tr>
      <td>Data</td>
      <td>Data2222222222222222222222222</td>
      <td>Data</td>
    </tr>
    <tr>
      <td>Data</td>
      <td>Data</td>
      <td>Data3333333333333333333333333</td>
    </tr>
    <tr>
      <td>Data</td>
      <td>Data</td>
      <td>Data</td>
    </tr>
    <tr>
      <td>Data</td>
      <td>Data</td>
      <td>Data</td>
    </tr>
    <tr>
      <td>Data</td>
      <td>Data</td>
      <td>Data</td>
    </tr>
    <tr>
      <td>Data</td>
      <td>Data</td>
      <td>Data</td>
    </tr>
    <tr>
      <td>Data</td>
      <td>Data</td>
      <td>Data</td>
    </tr>
    <tr>
      <td>Data</td>
      <td>Data</td>
      <td>Data</td>
    </tr>
    <tr>
      <td>Data</td>
      <td>Data</td>
      <td>Data</td>
    </tr>
  </tbody>
</table>

.table-sticky>thead>tr>th,
.table-sticky>thead>tr>td {
	background: #009688;
	color: #fff;
	top: 0px;
	position: sticky;
}
.table-height {
	height: 320px;
	display: block;
	overflow: scroll;
	width: 100%;
}

table {
	border-collapse: collapse;
	border-spacing: 0;
}

.table-bordered>thead>tr>th,
.table-bordered>tbody>tr>th,
.table-bordered>thead>tr>td,
.table-bordered>tbody>tr>td {
	border: 1px solid #ddd;
}
<!DOCTYPE html>
<html lang="en">
   <head>
      <meta charset="UTF-8" />
      <title>Fixed Table Header</title>
      <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0" />
   </head>
   <body>
      <div id="container">
         <div class="table-responsive table-height">
            <table class="table table-bordered table-striped table-hover table-sticky">
               <thead style="background:#1e91cf;color:#fff">
                  <tr>
                     <th class="text-center" rowspan="2"> Product</th>
                     <th class="text-center" colspan="2"> Sellable</th>
                     <th class="text-center" colspan="2"> Unsellable</th>
                     <th class="text-center" colspan="2"> Total</th>
                     <th class="text-center" colspan="6">2018-July</th>
                     <th class="text-center" colspan="6">2018-June</th>
                     <th class="text-center" colspan="6">2018-May</th>
                     <th class="text-center" colspan="6">2018-April</th>
                  </tr>
                  <tr>
                     <th class="text-center" style="top: 23px;"> Units</th>
                     <th class="text-center" style="top: 23px;"> Amount</th>
                     <th class="text-center" style="top: 23px;"> Units</th>
                     <th class="text-center" style="top: 23px;"> Amount</th>
                     <th class="text-center" style="top: 23px;"> Units</th>
                     <th class="text-center" style="top: 23px;"> Amount</th>
                     <th class="text-center" style="top: 23px;">SU</th>
                     <th class="text-center" style="top: 23px;">SA</th>
                     <th class="text-center" style="top: 23px;">UU</th>
                     <th class="text-center" style="top: 23px;">UA</th>
                     <th class="text-center" style="top: 23px;">TU</th>
                     <th class="text-center" style="top: 23px;">TA</th>
                     <th class="text-center" style="top: 23px;">SU</th>
                     <th class="text-center" style="top: 23px;">SA</th>
                     <th class="text-center" style="top: 23px;">UU</th>
                     <th class="text-center" style="top: 23px;">UA</th>
                     <th class="text-center" style="top: 23px;">TU</th>
                     <th class="text-center" style="top: 23px;">TA</th>
                     <th class="text-center" style="top: 23px;">SU</th>
                     <th class="text-center" style="top: 23px;">SA</th>
                     <th class="text-center" style="top: 23px;">UU</th>
                     <th class="text-center" style="top: 23px;">UA</th>
                     <th class="text-center" style="top: 23px;">TU</th>
                     <th class="text-center" style="top: 23px;">TA</th>
                     <th class="text-center" style="top: 23px;">SU</th>
                     <th class="text-center" style="top: 23px;">SA</th>
                     <th class="text-center" style="top: 23px;">UU</th>
                     <th class="text-center" style="top: 23px;">UA</th>
                     <th class="text-center" style="top: 23px;">TU</th>
                     <th class="text-center" style="top: 23px;">TA</th>
                  </tr>
               </thead>
               <tbody>
                  <tr>
                     <td class="text-left">INFOCUS-TURBO5-GG-16GB-D</td>
                     <td class="text-left">1244</td>
                     <td class="text-left">75,12,756</td>
                     <td class="text-left">173</td>
                     <td class="text-left">10,50,827</td>
                     <td class="text-left">1417</td>
                     <td class="text-left">85,63,583</td>
                     <td class="text-left">11</td>
                     <td class="text-left">65,989</td>
                     <td class="text-left">3</td>
                     <td class="text-left">18,497</td>
                     <td class="text-left">14</td>
                     <td class="text-left">84,486</td>
                     <td class="text-left">112</td>
                     <td class="text-left">6,71,888</td>
                     <td class="text-left">17</td>
                     <td class="text-left">1,01,983</td>
                     <td class="text-left">129</td>
                     <td class="text-left">7,73,871</td>
                     <td class="text-left">649</td>
                     <td class="text-left">38,93,351</td>
                     <td class="text-left">85</td>
                     <td class="text-left">5,10,415</td>
                     <td class="text-left">734</td>
                     <td class="text-left">44,03,766</td>
                     <td class="text-left">472</td>
                     <td class="text-left">28,81,528</td>
                     <td class="text-left">68</td>
                     <td class="text-left">4,19,932</td>
                     <td class="text-left">540</td>
                     <td class="text-left">33,01,460</td>
                  </tr>
                  <tr>
                     <td class="text-left">INFOCUS-TURBO5-GG-32GB-D</td>
                     <td class="text-left">2140</td>
                     <td class="text-left">1,50,25,360</td>
                     <td class="text-left">453</td>
                     <td class="text-left">31,98,547</td>
                     <td class="text-left">2593</td>
                     <td class="text-left">1,82,23,907</td>
                     <td class="text-left">222</td>
                     <td class="text-left">15,53,778</td>
                     <td class="text-left">41</td>
                     <td class="text-left">2,86,959</td>
                     <td class="text-left">263</td>
                     <td class="text-left">18,40,737</td>
                     <td class="text-left">558</td>
                     <td class="text-left">39,05,442</td>
                     <td class="text-left">113</td>
                     <td class="text-left">7,90,887</td>
                     <td class="text-left">671</td>
                     <td class="text-left">46,96,329</td>
                     <td class="text-left">798</td>
                     <td class="text-left">55,85,202</td>
                     <td class="text-left">168</td>
                     <td class="text-left">11,78,332</td>
                     <td class="text-left">966</td>
                     <td class="text-left">67,63,534</td>
                     <td class="text-left">562</td>
                     <td class="text-left">39,80,938</td>
                     <td class="text-left">131</td>
                     <td class="text-left">9,42,369</td>
                     <td class="text-left">693</td>
                     <td class="text-left">49,23,307</td>
                  </tr>
                  <tr>
                     <td class="text-left">INFOCUS-TURBO5-MG-16GB-DAR</td>
                     <td class="text-left">371</td>
                     <td class="text-left">22,25,629</td>
                     <td class="text-left">45</td>
                     <td class="text-left">2,69,955</td>
                     <td class="text-left">416</td>
                     <td class="text-left">24,95,584</td>
                     <td class="text-left">39</td>
                     <td class="text-left">2,33,961</td>
                     <td class="text-left">9</td>
                     <td class="text-left">53,991</td>
                     <td class="text-left">48</td>
                     <td class="text-left">2,87,952</td>
                     <td class="text-left">294</td>
                     <td class="text-left">17,63,706</td>
                     <td class="text-left">32</td>
                     <td class="text-left">1,91,968</td>
                     <td class="text-left">326</td>
                     <td class="text-left">19,55,674</td>
                     <td class="text-left">38</td>
                     <td class="text-left">2,27,962</td>
                     <td class="text-left">4</td>
                     <td class="text-left">23,996</td>
                     <td class="text-left">42</td>
                     <td class="text-left">2,51,958</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                  </tr>
                  <tr>
                     <td class="text-left">INFOCUS-TURBO5-MG-32GB-D</td>
                     <td class="text-left">6</td>
                     <td class="text-left">44,994</td>
                     <td class="text-left">3</td>
                     <td class="text-left">22,497</td>
                     <td class="text-left">9</td>
                     <td class="text-left">67,491</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">0</td>
                     <td class="text-left">0</td>
                     <td class="text-left">1</td>
                     <td class="text-left">7,499</td>
                     <td class="text-left">1</td>
                     <td class="text-left">7,499</td>
                     <td class="text-left">3</td>
                     <td class="text-left">22,497</td>
                     <td class="text-left">1</td>
                     <td class="text-left">7,499</td>
                     <td class="text-left">4</td>
                     <td class="text-left">29,996</td>
                     <td class="text-left">3</td>
                     <td class="text-left">22,497</td>
                     <td class="text-left">1</td>
                     <td class="text-left">7,499</td>
                     <td class="text-left">4</td>
                     <td class="text-left">29,996</td>
                  </tr>
                  <tr>
                     <td class="text-left">INFOCUS-TURBO5-RG-32GB-D</td>
                     <td class="text-left">1459</td>
                     <td class="text-left">1,09,84,041</td>
                     <td class="text-left">335</td>
                     <td class="text-left">25,23,665</td>
                     <td class="text-left">1794</td>
                     <td class="text-left">1,35,07,706</td>
                     <td class="text-left">141</td>
                     <td class="text-left">10,57,359</td>
                     <td class="text-left">40</td>
                     <td class="text-left">2,99,960</td>
                     <td class="text-left">181</td>
                     <td class="text-left">13,57,319</td>
                     <td class="text-left">558</td>
                     <td class="text-left">41,84,442</td>
                     <td class="text-left">116</td>
                     <td class="text-left">8,69,884</td>
                     <td class="text-left">674</td>
                     <td class="text-left">50,54,326</td>
                     <td class="text-left">369</td>
                     <td class="text-left">27,67,131</td>
                     <td class="text-left">101</td>
                     <td class="text-left">7,57,399</td>
                     <td class="text-left">470</td>
                     <td class="text-left">35,24,530</td>
                     <td class="text-left">391</td>
                     <td class="text-left">29,75,109</td>
                     <td class="text-left">78</td>
                     <td class="text-left">5,96,422</td>
                     <td class="text-left">469</td>
                     <td class="text-left">35,71,531</td>
                  </tr>
                  <tr>
                     <td class="text-left">INFOCUS-TURBO5PLUS-MB-32GB-D</td>
                     <td class="text-left">5</td>
                     <td class="text-left">39,995</td>
                     <td class="text-left">4</td>
                     <td class="text-left">31,996</td>
                     <td class="text-left">9</td>
                     <td class="text-left">71,991</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">5</td>
                     <td class="text-left">39,995</td>
                     <td class="text-left">4</td>
                     <td class="text-left">31,996</td>
                     <td class="text-left">9</td>
                     <td class="text-left">71,991</td>
                  </tr>
                  <tr>
                     <td class="text-left">INFOCUS-VISION3-16GB-D</td>
                     <td class="text-left">4005</td>
                     <td class="text-left">2,80,30,995</td>
                     <td class="text-left">618</td>
                     <td class="text-left">43,25,382</td>
                     <td class="text-left">4623</td>
                     <td class="text-left">3,23,56,377</td>
                     <td class="text-left">28</td>
                     <td class="text-left">1,95,972</td>
                     <td class="text-left">8</td>
                     <td class="text-left">55,992</td>
                     <td class="text-left">36</td>
                     <td class="text-left">2,51,964</td>
                     <td class="text-left">234</td>
                     <td class="text-left">16,37,766</td>
                     <td class="text-left">44</td>
                     <td class="text-left">3,07,956</td>
                     <td class="text-left">278</td>
                     <td class="text-left">19,45,722</td>
                     <td class="text-left">1727</td>
                     <td class="text-left">1,20,87,273</td>
                     <td class="text-left">241</td>
                     <td class="text-left">16,86,759</td>
                     <td class="text-left">1968</td>
                     <td class="text-left">1,37,74,032</td>
                     <td class="text-left">2016</td>
                     <td class="text-left">1,41,09,984</td>
                     <td class="text-left">325</td>
                     <td class="text-left">22,74,675</td>
                     <td class="text-left">2341</td>
                     <td class="text-left">1,63,84,659</td>
                  </tr>
                  <tr>
                     <td class="text-left">INFOCUS-VISION3-BL-16GB-D</td>
                     <td class="text-left">9344</td>
                     <td class="text-left">6,53,98,656</td>
                     <td class="text-left">1161</td>
                     <td class="text-left">81,25,839</td>
                     <td class="text-left">10505</td>
                     <td class="text-left">7,35,24,495</td>
                     <td class="text-left">301</td>
                     <td class="text-left">21,06,699</td>
                     <td class="text-left">60</td>
                     <td class="text-left">4,19,940</td>
                     <td class="text-left">361</td>
                     <td class="text-left">25,26,639</td>
                     <td class="text-left">2339</td>
                     <td class="text-left">1,63,70,661</td>
                     <td class="text-left">304</td>
                     <td class="text-left">21,27,696</td>
                     <td class="text-left">2643</td>
                     <td class="text-left">1,84,98,357</td>
                     <td class="text-left">3745</td>
                     <td class="text-left">2,62,11,255</td>
                     <td class="text-left">440</td>
                     <td class="text-left">30,79,560</td>
                     <td class="text-left">4185</td>
                     <td class="text-left">2,92,90,815</td>
                     <td class="text-left">2959</td>
                     <td class="text-left">2,07,10,041</td>
                     <td class="text-left">357</td>
                     <td class="text-left">24,98,643</td>
                     <td class="text-left">3316</td>
                     <td class="text-left">2,32,08,684</td>
                  </tr>
                  <tr>
                     <td class="text-left">INFOCUS-VISION3PRO-MNB-</td>
                     <td class="text-left">620</td>
                     <td class="text-left">68,19,380</td>
                     <td class="text-left">104</td>
                     <td class="text-left">11,43,896</td>
                     <td class="text-left">724</td>
                     <td class="text-left">79,63,276</td>
                     <td class="text-left">47</td>
                     <td class="text-left">5,16,953</td>
                     <td class="text-left">13</td>
                     <td class="text-left">1,42,987</td>
                     <td class="text-left">60</td>
                     <td class="text-left">6,59,940</td>
                     <td class="text-left">198</td>
                     <td class="text-left">21,77,802</td>
                     <td class="text-left">46</td>
                     <td class="text-left">5,05,954</td>
                     <td class="text-left">244</td>
                     <td class="text-left">26,83,756</td>
                     <td class="text-left">344</td>
                     <td class="text-left">37,83,656</td>
                     <td class="text-left">45</td>
                     <td class="text-left">4,94,955</td>
                     <td class="text-left">389</td>
                     <td class="text-left">42,78,611</td>
                     <td class="text-left">31</td>
                     <td class="text-left">3,40,969</td>
                     <td class="text-left">0</td>
                     <td class="text-left">0</td>
                     <td class="text-left">31</td>
                     <td class="text-left">3,40,969</td>
                  </tr>
                  <tr>
                     <td class="text-left">MOTO-G5-FG-16GB</td>
                     <td class="text-left">52</td>
                     <td class="text-left">4,27,812</td>
                     <td class="text-left">28</td>
                     <td class="text-left">2,36,063</td>
                     <td class="text-left">80</td>
                     <td class="text-left">6,63,875</td>
                     <td class="text-left">0</td>
                     <td class="text-left">0</td>
                     <td class="text-left">1</td>
                     <td class="text-left">8,985</td>
                     <td class="text-left">1</td>
                     <td class="text-left">8,985</td>
                     <td class="text-left">0</td>
                     <td class="text-left">0</td>
                     <td class="text-left">1</td>
                     <td class="text-left">8,229</td>
                     <td class="text-left">1</td>
                     <td class="text-left">8,229</td>
                     <td class="text-left">14</td>
                     <td class="text-left">1,15,465</td>
                     <td class="text-left">8</td>
                     <td class="text-left">68,675</td>
                     <td class="text-left">22</td>
                     <td class="text-left">1,84,140</td>
                     <td class="text-left">38</td>
                     <td class="text-left">3,12,347</td>
                     <td class="text-left">18</td>
                     <td class="text-left">1,50,174</td>
                     <td class="text-left">56</td>
                     <td class="text-left">4,62,521</td>
                  </tr>                
                  <tr>
                     <td class="text-left">MOTO-GPLUS4-BL-16GB</td>
                     <td class="text-left">0</td>
                     <td class="text-left">0</td>
                     <td class="text-left">1</td>
                     <td class="text-left">10,499</td>
                     <td class="text-left">1</td>
                     <td class="text-left">10,499</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">0</td>
                     <td class="text-left">0</td>
                     <td class="text-left">1</td>
                     <td class="text-left">10,499</td>
                     <td class="text-left">1</td>
                     <td class="text-left">10,499</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                     <td class="text-left">Data Not Available</td>
                  </tr>
               </tbody>
            </table>
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</html>