title: Length validation in field triggers error icon
body: <p>I'm trying to make an icon, tooltip or chatbubble appear in a field when a user tries to input a longer string than the field should accept. I've googled this extensively and I'm rather astounded that this seems to have no easy solution. I've found simple solutions to change the field appearance when the input is invalid but none that flash a warning and retain a legal previous value in the field.  How would one go about achieving this?</p>