JSFiddle - React, Tailwind, and code Playground

HTML

<p style="font-size:14px;font-weight:700;color:grey;">' . $user_pic . ' <a href="profile.php?id=' . $mem_id . '" style="color:#0F39C5;">' . $knockfirst . ' ' . $knocklast . '</a> is knocking. Let him in?
<form class="chatForm" action="messages/group/addToChat.php" method="post" name="adduser"><input type="hidden" id="newid" name="newid" value="' . $mem_id . '"><input type="hidden" id="groupid" name="groupid" value="' . $group_id . '"><a href="#" onclick="$(this).closest(\'form\').submit(); return false;" style="color:#0F39C5;font-size:15px;">Yes</a></form>
<form class="declineForm" action="messages/group/declineKnock.php" method="post" name="declineuser"><input type="hidden" id="newid" name="newid" value="' . $mem_id . '"><input type="hidden" id="groupid" name="groupid" value="' . $group_id . '"> | 
<a href="#" onclick="$(this).closest(\'form\').submit(); return false;" style="color:#0F39C5;font-size:15px;">No</a></form></p>

CSS

.chatForm, .declineForm {
    display: inline-block;
}