Showing error without page refresh

Question

I\'m making a comment feature for my website and need to make it so that after the person submits a comment (and it contains errors), it will show the error without refreshi

Answer 1

I think it is easier to do the validation at the client side via Javascript. Instead of simply using a button of type submit, write a function and bind it to the button's onclick() event.

Something like this:

function submit() {
  if (document.getElementById("myTextarea").value=='') {
    alert("Your comment is too short.");
  }
  else {
    document.getElementById("myForm").submit();
  }
}