// This file is autogenerated, DO NOT EDIT
// Use `node scripts/generate-docs-examples.js` to generate the docs examples

[source, js]
----
const response = await client.updateByQuery({
  index: 'twitter',
  refresh: true,
  slices: '5',
  body: {
    script: {
      source: "ctx._source['extra'] = 'test'"
    }
  }
})
console.log(response)
----