Jquery or javascript to add one line break after the space (if) else add after x amount of characters in a

Jquery or javascript to add one line break after the space (if) else add
after x amount of characters in a

Jquery or javascript to add one line break <br /> after the space (if
space is there) in the line if space is not there need to add <br/> after
x amount of characters in a <td>
<td class="td_name">jone Methionylthreonylthreonylglutaminylarginy</td>