How to listen to input boxes in real time

As shown below:

    $('#phone').on('input', function(e) {
      //Real-time monitoring of changes in mobile phone number input box      if($('#phone').val()) {
        //The content of the input box is not empty      }else{
        //The input box is empty      }
    })

The change event takes effect when the focus is lost. Using input can easily implement real-time monitoring of input boxes

The above method of real-time monitoring of input boxes is all the content I share with you. I hope you can give you a reference and I hope you can support me more.