correct way to append with jquery

jquery append() actually appends an element. So, we need to make the append statement an entire row, in case we're appending to a table.

Populate html table on jQuery success event - Stack Overflow

table.append("<tr><td>"+elem.username+"</td><td>"+elem.name+"</td>   <td>"+elem.lastname+"</td></tr>");

and not something like

table.append("<tr><td>");

table.append(elem.username);

table.append("</td><td>");

etc.