We purge it [here](https://github.com/facebook/react/blob/b11540ccb2321aeb7259fcf0b3a38aeeea35231d/src/isomorphic/ReactDebugTool.js#L88-L89) but this code doesn’t run because of the [early exit](https://github.com/facebook/react/blob/b11540ccb2321aeb7259fcf0b3a38aeeea35231d/src/isomorphic/ReactDebugTool.js#L53-L57).

Need to fix this and add a test case to make sure we don’t regress on it.

color: 'red',
        backgroundColor: 'yellow',
      }} />, node);
      ReactDOM.render(<div style={{
        color: 'red',
        backgroundColor: 'yellow',
      }} />, node);
      assertHistoryMatches([{
        instanceID: inst._debugID,
        type: 'update styles',
        payload: {
          color: 'red',
          backgroundColor: 'yellow',
        },
      }]);
    });
  });
  describe('update attribute', () => {
    describe('simple attribute', () => {
      it('gets recorded during mount', () => {
        var node = document.createElement('div');
        ReactDOM.render(<div className="rad" tabIndex={42} />, node);
        var inst = ReactDOMComponentTree.getInstanceFromNode(node.firstChild);
        if (ReactDOMFeatureFlags.useCreateElement) {
          assertHistoryMatches([{
            instanceID: inst._debugID,
            type: 'update attribute',
            payload: { className: 'rad' },
          }, {
            instanceID: inst._debugID,