Formvalidation is not working.what's wrong in my code

Question

https://code.sololearn.com/Wkwj4nTpUY5e/?ref=app

Answer 1

Add event parameter to your function call and definition then prevent the default behavior of submission

onsubmit="formvalidation(event)"

formvalidation(event){
event.preventDefault();
}

Answer 2

Your input type says 'username' it should say 'text'