how to add reaction to blogger

of course yes!

just need to activate it in setting

then

if your templet is moded mybe it will not work just need to add some codes to the templet

go to them > edite html

and add

<span class='reaction-buttons'>
<b:if cond='data:top.showReactions'>
<table border='0' cellpadding='0' cellspacing='0' width='100%'>
<tr>
<td class='reactions-label-cell' nowrap='nowrap' valign='top' width='1%'>
<span class='reactions-label'>
<data:top.reactionsLabel/></span></td>
<td><iframe allowtransparency='true' class='reactions-iframe' expr:src='data:post.reactionsUrl' frameborder='0' name='reactions' scrolling='no'/></td>
</tr></table>
</b:if>
</span>

after

           <div class='label-head'>
           <span>Tags :</span>
                 <b:if cond='data:post.labels'>
                    <b:loop values='data:post.labels' var='label'>
                      <a expr:href='data:label.url' rel='tag'><data:label.name/></a><b:if            cond='data:label.isLast != &quot;true&quot;'/>
 </b:loop>
 </b:if>
  </div>