Detect when input box filled by keyboard and when by barcode scanner.

Question

How I can programmatically detect when text input filled by typing on keyboard and when it filled automatically by bar-code scanner?

Answer 1

Hi I have and alternative solution for evaluate a result of the bar code scanner without use of jQuery, first you need and input text that have a focus the moment that the barcode scanner is works

The code in JavaScript is:

var elmInputScan = document.getElementById('input_resultado');           

elmInputScan.addEventListener('keypress', function (e){        
  clearInterval( timer_response );    
  timer_response = setTimeout( "onInputChange()", 10);
});    

When the barcode scanner input the text call serveral times to the keypress event, but only I interested to the final result, for this reason I use the timer. That's all, you can process the value into the onInputChange function.

function onInputChange() {    
  console.log( document.getElementById('input_resultado').value );
}