docs: function () {
              var left = this._savedX1, right = this._savedX2;
  
              var first = Math.max(left / this._railWidth, 0);
              var second = Math.min((right - this._firstWidth) / this._railWidth, 1);
  
              if (this.value[0] !== first || this.value[1] !== second) {
                  this.value = [first, second];
                  var binding = this._binding;
                  ariaUtilsJson.setValue(binding.inside, binding.to, this.value);
              } else {
                  // Trying to go somewhere far, don't update value, but only the display
                  this._notifyDataChange();
              }
              return;
          }