How can i add required field while creating a form?

Answer 1

You need to check it with your next_button using jquery

  

    

      Mobile Number:
    
    

      {!! Form::input('number', 'mobile',  null, ['type' => 'number', 'min' => 0, 'id' => 'mobile', 'class' => 'input-lg form-control TabOnEnter', 'placeholder' => 'Eg: 9876543210', 'tabindex' => 15]) !!}

    Next
    
  

$(document).ready(function(){
   $('.next_button').click(function(event){
        if ($('#mobile').val() == ""){
            event.preventDefault();
            alert('Enter the number');
        }
    });
});

Added next_button class in your existing code