How to save to a variable what is typed on the screen

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I have a web page, and sometimes users press some numbers.

However, I have a Reader by usb, I while reading a code it shows me automatically 7 numbers, as if I had typed them on the web page.

How do I save these 7 numbers that are "typed" immediately on the web page, without input, with javascript?

javascript

1 answer

6


One option is to put one Listener in the document and store in an array the values pressed (or keyCodes) and do a continuous search in that array to check if what it has is what you’re looking for - or even store only what you want based on the keycode:

document.addEventListener("keydown", keyDownPress, false);
var valoresDigitados = [];

function keyDownPress(e) {
  var keyCode = e.keyCode;
  valoresDigitados.push(String.fromCharCode(keyCode));
}

function verValores(){
 console.log(valoresDigitados.join(""));
}
<button onclick="verValores()">Ver valores</button>

  • It is exactly, what I want, however, appears to me separate values "4","2","7","6", how do I get everyone together in the way: "4276"? Thank you.

  • I put a Join to join the array values, @Gonçalo

  • Thank you, this is what I was looking for, by the way, how do I put it in my document, because I put it and I can’t. How do I do the structure? I first put the <script> and the code or only after html?

  • I edited my question, the way I put the script.

  • I trust you’ll have no problem putting head by not manipulating any element that has not yet been created.

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