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

[source, js]
----
const response = await client.reindex({
  source: {
    index: "metricbeat-*",
  },
  dest: {
    index: "metricbeat",
  },
  script: {
    lang: "painless",
    source:
      "ctx._index = 'metricbeat-' + (ctx._index.substring('metricbeat-'.length(), ctx._index.length())) + '-1'",
  },
});
console.log(response);
----
