// 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.indices.create({
  index: "my-index-000001",
  mappings: {
    properties: {
      my_join_field: {
        type: "join",
        relations: {
          question: ["answer", "comment"],
          answer: "vote",
        },
      },
    },
  },
});
console.log(response);
----