JSFiddle - React, Tailwind, and code Playground

HTML

<table class="myTable" border="1" width="80%">
<thead>    
<tr >
    <td></td>
    <td>one</td>
    <td></td>
    <td></td>
</tr>
    </thead>
    <tbody>
<tr>
        <td></td>
            <td>two</td> 
<td><button onClick="MoveUp.call(this);">&#8679;</button></td>
<td><button onClick="MoveDown.call(this);">&#8681;</button></td>
    </tr>
    <tr>
        <td></td>
            <td>three</td> 
<td><button onClick="MoveUp.call(this);">&#8679;</button></td>
<td><button onClick="MoveDown.call(this);">&#8681;</button></td>
    </tr>
        <tr>
        <td></td>
            <td>four</td> 
<td><button onClick="MoveUp.call(this);">&#8679;</button></td>
<td><button onClick="MoveDown.call(this);">&#8681;</button></td>
    </tr>
        <tr>
        <td></td>
            <td>five</td> 
<td><button onClick="MoveUp.call(this);">&#8679;</button></td>
<td><button onClick="MoveDown.call(this);">&#8681;</button></td>
    </tr>
    </tbody>
        </table>

CSS

table.myTable {
    counter-reset: rowNumber;
}

table.myTable tr {
    counter-increment: rowNumber;
}

table.myTable tr td:first-child::before {
    content: counter(rowNumber);
    min-width: 1em;
    margin-right: 0.5em;
}

JavaScript

function get_previoussibling(n)
{
    x=n.previousSibling;
    while (x.nodeType!=1)
      {
      x=x.previousSibling;
      }
    return x;
} 

function get_nextsibling(n)
{
    x=n.nextSibling;
    while ( x != null && x.nodeType!=1)
      {
      x=x.nextSibling;
      }
    return x;
} 
function MoveUp()
    {
        var table,
            row = this.parentNode;
        
        while ( row != null ) {
            if ( row.nodeName == 'TR' ) {
                break;
            }
            row = row.parentNode;
        }
        table = row.parentNode;
        table.insertBefore ( row, get_previoussibling( row ) );
    }

    function MoveDown()
    {
        var table,
            row = this.parentNode;
        
        while ( row != null ) {
            if ( row.nodeName == 'TR' ) {
                break;
            }
            row = row.parentNode;
        }
        table = row.parentNode;
        table.insertBefore ( row, get_nextsibling ( get_nextsibling( row ) ) );
    }