`useSliceIdsListener`

The useSliceIdsListener primitive registers a listener function with the Indexes object that will be called whenever the Slice Ids in an Index change.

useSliceIdsListener(
  indexId: MaybeAccessor<IdOrNull>,
  listener: SliceIdsListener,
  indexesOrIndexesId?: MaybeAccessor<undefined | IndexesOrIndexesId>,
): void

	Type	Description
`indexId`	`MaybeAccessor<IdOrNull>`	The `Id` of the `Index` to listen to, or `null` as a wildcard.
`listener`	`SliceIdsListener`	The function that will be called whenever the `Slice` `Ids` in the `Index` change.
`indexesOrIndexesId?`	`MaybeAccessor<undefined \| IndexesOrIndexesId>`	The `Indexes` object to register the listener with: omit for the default context `Indexes` object, provide an `Id` for a named context `Indexes` object, or provide an explicit reference.
returns	`void`	This has no return value.

This primitive is useful for situations where a component needs to register its own specific listener to do more than simply tracking the value (which is more easily done with the useSliceIds primitive).

You can either listen to a single Index (by specifying the Index Id as the method's first parameter), or changes to any Index (by providing a null wildcard).

Unlike the addSliceIdsListener method, which returns a listener Id and requires you to remove it manually, the useSliceIdsListener primitive manages this you to remove it manually, the useWillFinisTransactionListener primitive manages this lifecycle for you: when the component unmounts, the listener on the underlying Indexes object will be deleted.

Example

This example creates the TinyBase objects needed by the Solid primitive or component and calls it from within a reactive root.

import {createRoot} from 'solid-js';
import {
  createCheckpoints,
  createIndexes,
  createMetrics,
  createQueries,
  createRelationships,
  createStore,
} from 'tinybase';
import {useSliceIdsListener} from 'tinybase/ui-solid';

createRoot((dispose) => {
  const store = createStore()
    .setTables({
      pets: {
        fido: {species: 'dog', color: 'brown', next: 'felix'},
        felix: {species: 'cat', color: 'black'},
      },
      species: {dog: {price: 5}, cat: {price: 4}},
    })
    .setValues({open: true});
  const metrics = createMetrics(store).setMetricDefinition(
    'highestPrice',
    'species',
    'max',
    'price',
  );
  const indexes = createIndexes(store).setIndexDefinition(
    'bySpecies',
    'pets',
    'species',
  );
  const relationships = createRelationships(store)
    .setRelationshipDefinition('petSpecies', 'pets', 'species', 'species')
    .setRelationshipDefinition('nextPet', 'pets', 'pets', 'next');
  const queries = createQueries(store).setQueryDefinition(
    'petColors',
    'pets',
    ({select, where, param}) => {
      select('color');
      where((getCell) => getCell('species') == param('species'));
    },
    {species: 'dog'},
  );
  const checkpoints = createCheckpoints(store);
  store.setCell('pets', 'fido', 'color', 'walnut');
  checkpoints.setCheckpoint('updated color');
  metrics.getMetric('highestPrice');
  indexes.getSliceIds('bySpecies');
  relationships.getRemoteRowId('petSpecies', 'fido');
  queries.getResultRowIds('petColors');
  useSliceIdsListener('bySpecies', () => undefined, indexes);
  dispose();
});

Since

v8.3.0