Using without onClick not possible

[nygrenh]

Uncaught TypeError: _this2.props.onClick is not a function
    at onClick (index.js:5041)
    at Object.ReactErrorUtils.invokeGuardedCallback (ReactErrorUtils.js:69)
    at executeDispatch (EventPluginUtils.js:85)
    at Object.executeDispatchesInOrder (EventPluginUtils.js:108)
    at executeDispatchesAndRelease (EventPluginHub.js:43)
    at executeDispatchesAndReleaseTopLevel (EventPluginHub.js:54)
    at Array.forEach (<anonymous>)
    at forEachAccumulated (forEachAccumulated.js:24)
    at Object.processEventQueue (EventPluginHub.js:257)
    at runEventQueueInBatch (ReactEventEmitterMixin.js:17)