Event Button Disabled

HTML

<button id="btn">
Click!
</button>

JavaScript

var btn = document.getElementById('btn');
btn.addEventListener('click', function(e) {
	e.preventDefault();
  e.target.disabled = true;
  var that = e;
  console.log(e);
  setTimeout(function() { // через 5 секунд отпустит
  	that.target.disabled = false;
    console.log(that);
  }, 5000);
}, false)