How will I compare a text input if it is empty or not?

Question

Question by eggshot

How will I compare a text input if it is empty or not inside a Jquery statement? Is the code below alright?

$(#'generate').click(function(){
   if(parseInt($('#lastname').val,10)==0){
      alert("Should Not Be Empty!");
   }
}

Answer 1

Simply

$('#generate').click(function(){
    if($('#lastname').val().trim() != "") {
       alert("Should Not Be Empty!");
    }
}

Also, there is a typo

  $(#'generate').click(function(){
//   ^   Right here