正在从this.props.children获取值

const checkForCustomProp = children => {
  let childArray = React.Children.toArray(children);
  let child;
  let hasCustomProp = false;

  for (let i = 0; i < childArray.length; i++) {
    child = childArray[i];
    if (child.type === "td" && child.props.customPropEnabled) {
      return true;
    } else if (child.props && child.props.children) {
      hasCustomProp = checkForCustomProp(child.props.children);
    }
  }

  return hasCustomProp;
};

function CustomTable(props) {
  const { children } = props;
  const hasCustomProp = checkForCustomProp(children);

  return (
    <div>
      <table>{children}</table>
      {hasCustomProp && <div>Has custom prop!</div>}
    </div>
  );
}

ReactDOM.render(
  <CustomTable>
    <thead>....</thead>
    <tbody>
      <tr>
        <td customPropEnabled>xyz</td>
      </tr>
    </tbody>
  </CustomTable>,
  document.getElementById("root")
);

<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react-dom.min.js"></script>

<div id="root"></div>