Function validateInstanceHandle

examples/simple/react.js:2287–2290

()

var InstanceHandle = null;

function validateInstanceHandle() {
  var valid = InstanceHandle && InstanceHandle.traverseTwoPhase && InstanceHandle.traverseEnterLeave;
  "development" !== 'production' ? warning(valid, 'InstanceHandle not injected before use!') : undefined;
}

/**
 * This is a unified interface for event plugins to be installed and configured.