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<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JS Bin</title>
</head>
<body>
  <input type="text">
  <button id="btn">Btn</button>
</body>
</html>
 
function btnKeyupHandler(e) {
  console.log(
    'btn',
    e.keyCode,
    document.activeElement.tagName
  )
}
document.getElementById('btn').onkeyup = btnKeyupHandler
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avbobylevpro
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