Check if input empty on submit

Question

I\'ve been looking around for a solution to this, but can\'t seem to find any examples that work for me. Here\'s what I\'ve got so far:

$(\"#register-form\")         


        

Answer 1

name of the input or id in this case used id of the input

HTML:

JQUERY:

if (!$("#id").val()) {
   do something...
}