// 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,
  script: {
    source: "ctx._source.tags.add(params.tag)",
    lang: "painless",
    params: {
      tag: "blue",
    },
  },
});
console.log(response);
----