// 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.update({
  index: 'test',
  id: '1',
  body: {
    script: {
      source: 'ctx._source.tags.add(params.tag)',
      lang: 'painless',
      params: {
        tag: 'blue'
      }
    }
  }
})
console.log(response)
----