# BigBedAdapter

Auto-generated config schema for the current JBrowse release — see the [config guide](https://jbrowse.org/jb2/docs/config_guide) for concepts. Provided by the `bed` plugin. [View source](https://github.com/GMOD/jbrowse-components/blob/main/plugins/bed/src/BigBedAdapter/configSchema.ts).

## Example usage

```js
{
  type: 'FeatureTrack',
  trackId: 'my_track',
  name: 'My track',
  assemblyNames: ['hg38'],
  adapter: {
    type: 'BigBedAdapter',
    uri: 'https://example.com/features.bb',
  },
}
```

`features.bb` infers `BigBedAdapter` and `FeatureTrack` on its own, and `name` defaults to the file name. In a config declaring one assembly, `assemblyNames` comes from there too — see [the shortest track](https://jbrowse.org/jb2/docs/config_guides/tracks#the-shortest-track).

```js
{
  trackId: 'my_track',
  uri: 'https://example.com/features.bb',
  assemblyNames: ['hg38'],
}
```

_See the **Config slots** section below for all available configuration fields._

## Related links

- **Track:** [FeatureTrack](../featuretrack)
- **Display:** [LinearArcDisplay](../lineararcdisplay)
- **Display:** [LinearBasicDisplay](../linearbasicdisplay)
- **Display:** [LinearMultiRowFeatureDisplay](../linearmultirowfeaturedisplay)
- **Display:** [LinearScoreDisplay](../linearscoredisplay)

## Config slots

These slots go inside the track's `adapter`: `"adapter": { "type": "BigBedAdapter", ... }`. It also accepts the [shorthand](https://jbrowse.org/jb2/docs/config_guides/file_types#the-uri-shorthand) keys `uri`, `baseUri` in place of writing a location slot out. Slot types (`fileLocation`, `frozen`, ...) are explained in the [config slot types reference](https://jbrowse.org/jb2/docs/config_guides/slot_types). Slots a base configuration contributes are listed here too, so this table is the whole surface.

<!-- prettier-ignore -->
| Slot | Description |
| --- | --- |
| <span id="slot-bigbedlocation">**bigBedLocation**</span><br>[`fileLocation`](https://jbrowse.org/jb2/docs/config_guides/slot_types#filelocation) = <code>{ uri: '/path/to/my.bb', locationType: 'UriLocation' }</code> | location of the BigBed file. It carries its own index and summary zoom levels, so there is no separate index to configure. |
| <span id="slot-scorecolumn">**scoreColumn**</span><br>[`string`](https://jbrowse.org/jb2/docs/config_guides/slot_types#string) = <code>''</code> | The column to use as a "score" attribute |
| <span id="slot-aggregatefield">**aggregateField**</span><br>[`string`](https://jbrowse.org/jb2/docs/config_guides/slot_types#string) = <code>'geneName2'</code> | An attribute to aggregate features with |
| <span id="slot-disablegeneheuristic">**disableGeneHeuristic**</span><br>[`boolean`](https://jbrowse.org/jb2/docs/config_guides/slot_types#boolean) = <code>false</code> | Disable the heuristic that auto-detects BED12 features as gene/transcript structures. Useful for files that have BED12-like structure but are not genes (e.g. tandem duplications) |
| <span id="slot-densityadapter">**densityAdapter**</span><br>[`frozen`](https://jbrowse.org/jb2/docs/config_guides/slot_types#frozen) = <code>null</code> | optional quantitative sub-adapter (e.g. a BigWigAdapter over a features-per-bin bigWig) drawn as a density band where the region is too large to fetch features; null disables it |