JSFiddle - React, Tailwind, and code Playground
HTML
<table>
<tr>
<td >Specific operations/procedures</td>
<td>
<input type="checkbox" name="sd3" value="mfi_nam9" class="checkme"/>Other(please specify)<br/>
<input type="text" name="mfi_nam9" class="text required" id="mfi_name" >
</td>
</tr>
<tr>
<td >General principles/strategies</td>
<td>
<input type="checkbox" name="sd2[]" value="mfi_nam8" class="checkme"/>Other(please specify):<br/>
<input type="text" name="mfi_nam8" class="text required" id="mfi_name" >
</td>
</tr>
</table>
JavaScript
$('.checkme').attr('checked', true);
$('.checkme').click(function(){
if($('input[name='+ $(this).attr('value')+']').attr('disabled') == false){
$('input[name='+ $(this).attr('value')+']').attr('disabled', true);
}else{
$('input[name='+ $(this).attr('value')+']').attr('disabled', false);
}
});