JSFiddle - React, Tailwind, and code Playground

HTML

<table id="tableAppointment"> 
<thead>
<tr><th>Head1</th><th>Head2</th><th>Head3</th><th>Head4</th><th>Head5</th><th>Head6</th></tr>
</thead>
<tbody>
<tr><td>r1c1</td><td>r1c2</td><td>r1c3</td><td>r1c4</td><td>r1c5</td><td>r1c6</td></tr>
<tr><td>r2c1</td><td>r2c2</td><td>r2c3</td><td>r2c4</td><td>r2c5</td><td>r2c6</td></tr>
<tr><td>r3c1</td><td>r3c2</td><td>r3c3</td><td>r3c4</td><td>r3c5</td><td>r3c6</td></tr>
<tr><td>r4c1</td><td>r4c2</td><td>r4c3</td><td>r4c4</td><td>r4c5</td><td>r4c6</td></tr>
<tr><td>r5c1</td><td>r5c2</td><td>r5c3</td><td>r5c4</td><td>r5c5</td><td>r5c6</td></tr>
<tr><td>r6c1</td><td>r6c2</td><td>r6c3</td><td>r6c4</td><td>r6c5</td><td>r6c6</td></tr>
<tr><td>r7c1</td><td>r7c2</td><td>r7c3</td><td>r7c4</td><td>r7c5</td><td>r7c6</td></tr>
<tr><td>r8c1</td><td>r8c2</td><td>r8c3</td><td>r8c4</td><td>r8c5</td><td>r8c6</td></tr>
<tr><td>r9c1</td><td>r9c2</td><td>r9c3</td><td>r9c4</td><td>r9c5</td><td>r9c6</td></tr>
<tr><td>r10c1</td><td>r10c2</td><td>r10c3</td><td>r10c4</td><td>r10c5</td><td>r10c6</td></tr>
<tr><td>r11c1</td><td>r11c2</td><td>r11c3</td><td>r11c4</td><td>r11c5</td><td>r11c6</td></tr>
<tr><td>r12c1</td><td>r12c2</td><td>r12c3</td><td>r12c4</td><td>r12c5</td><td>r12c6</td></tr>
<tr><td>r13c1</td><td>r13c2</td><td>r13c3</td><td>r13c4</td><td>r13c5</td><td>r13c6</td></tr>
<tr><td>r14c1</td><td>r14c2</td><td>r14c3</td><td>r14c4</td><td>r14c5</td><td>r14c6</td></tr>
<tr><td>r15c1</td><td>r15c2</td><td>r15c3</td><td>r15c4</td><td>r15c5</td><td>r15c6</td></tr>
</tbody>
</table>

CSS

table {width:100%; border:1px solid #000000;}
/*thead {}*/
thead th { height:50px; width:100%; text-align:center;border-width: 1px;font-weight:bold;border-style: outset;}
tbody {color:#000000;text-align:center; height:150px; overflow: scroll; margin:0px;}
tbody td { height:60px; width:100px;border-width: 1px;border-style: outset;}
tfoot {background-color:#000268; color:#FFFFFF;text-align:center; position:fixed; bottom:0px;}
tfoot td { height:50px; width:100px; text-align:center;border-width: 1px;border-style: outset;}

JavaScript

var tdWidth = $("#tableAppointment tbody tr td").width();

$("#tableAppointment thead").css({'position': 'fixed','top': '0','left': '-0.2%', 'background-color': '#f94d4d','color': '#FFFFFF','text-align': 'center','width': '100%'});

$("#tableAppointment thead tr th").width(tdWidth);