message: Fix disabled true/false have the same effect on Tab (issue#2833)
diff: @@ -66,7 +66,7 @@ const DefaultTabBar = createReactClass({
  typeof name !== 'string' ? name.props.children : undefined;
  const { activeTextColor, inactiveTextColor } = this.props;
  const fontWeight = isTabActive ? 'bold' : 'normal';
  - const isDisabled = disabled !== undefined;
  + const isDisabled = !!disabled;
  let textColor;
  if (isDisabled) {
  textColor = disabledTextColor;
  