getListenerStats

The getListenerStats method provides a set of statistics about the listeners registered with the Relationships object, and is used for debugging purposes.

getListenerStats(): RelationshipsListenerStats

The RelationshipsListenerStats object contains a breakdown of the different types of listener.

The statistics are only populated in a debug build: production builds return an empty object. The method is intended to be used during development to ensure your application is not leaking listener registrations, for example.

const store = createStore();
const relationships = createRelationships(store);
relationships.addRemoteRowIdListener(null, null, () => {
  console.log('Remote Row Id changed');
});
relationships.addLocalRowIdsListener(null, null, () => {
  console.log('Local Row Id changed');
});

const listenerStats = relationships.getListenerStats();
console.log(listenerStats.remoteRowId);
// -> 1
console.log(listenerStats.localRowIds);
// -> 1