Помогите input type range

var range1 = document.getElementById('range1'); 
var range2 = document.getElementById('range2'); 
 
range1.addEventListener('input', function (e) { 
  range2.value = e.target.value; 
}); 
range2.addEventListener('input', function (e) { 
  range1.value = e.target.value; 
});

<input type="range" id="range1"> 
<input type="range" id="range2">