# ReadConnectionsStrokeWidth

Auto-generated from the config schema in the source — see the [config guide](https://jbrowse.org/jb2/docs/config_guide) for concepts. Provided by the `alignments` plugin. [View source](https://github.com/GMOD/jbrowse-components/blob/main/plugins/alignments/src/LinearAlignmentsDisplay/readConnectionsStrokeWidthConfigSchema.ts).

The read connections' `encoding.strokeWidth`, the width each arc or line
strokes at. By default each connection's `reads`, the reads that agree on
it, run through a log scale from 1 px at one read to 4 px at 44 or more,
so each doubling adds the same width. A number is the constant every
connection takes, whatever its reads, and is written to `value`.

## Example usage

```js
{
  type: 'LinearAlignmentsDisplay',
  readConnections: { show: true, encoding: { strokeWidth: 2 } },
}
```

```js
{
  type: 'LinearAlignmentsDisplay',
  readConnections: {
    show: true,
    encoding: { strokeWidth: { field: 'reads', scale: { range: [1, 8] } } },
  },
}
```

## Config slots

A setting written to it replaces it whole, since its members are alternatives: a member left out returns to its default. 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.

| Slot | Description |
| --- | --- |
| **value**<br>[`maybeNumber`](https://jbrowse.org/jb2/docs/config_guides/slot_types#the-maybe-types) | The px every connection strokes at while no field is written; the Line width menu writes it. Unset, `reads` maps through the scale. |
| **field**<br>[`maybeStringEnum`](https://jbrowse.org/jb2/docs/config_guides/slot_types#the-maybe-types) (reads) | `reads`, the reads that agree on a connection, the one count a width reads; a written field maps through `scale` over any `value`. |
| **scale**<br><code>ConfigurationSchema( 'ReadConnectionsStrokeWidthScale', { type: { type: 'stringEnum', model: types.enumeration('ReadConnectionsStrokeWidthScaleType', [ ...READ_CONNECTIONS_WIDTH_SCALES, ]), defaultValue: 'log', description: 'log adds the same width per doubling of reads; linear the same per read', }, range: { type: 'stringArray', defaultValue: [], description: 'px at one read and at 44; empty is 1 to 4', }, }, { closed: true, preProcessSnapshot: (snap: Record&lt;string, unknown&gt; = {}) =&gt; Array.isArray(snap.range) ? { ...snap, range: snap.range.map(String) } : snap, }, )</code> | How `reads` map to a width: from one read to 44, past which more reads add no width. |
| **type**<br>[`stringEnum`](https://jbrowse.org/jb2/docs/config_guides/slot_types#stringenum) (log, linear) = <code>'log'</code> | log adds the same width per doubling of reads; linear the same per read |
| **range**<br>[`stringArray`](https://jbrowse.org/jb2/docs/config_guides/slot_types#stringarray) = <code>[]</code> | The px at one read and at 44, thinnest first. Empty is 1 to 4. |