indices.create-9.3-javascript.md

endpoint	indices.create
lang	javascript
es_version	9.3
client	@elastic/elasticsearch@9.3.0

Elasticsearch 9.3 indices.create endpoint (JavaScript example)

Use client.indices.create() to create a new index with explicit field mappings:

await client.indices.create({
  index: "products",
  mappings: {
    properties: {
      name: { type: "text" },
      price: { type: "float" },
      category: { type: "keyword" },
      in_stock: { type: "boolean" },
      created_at: { type: "date" },
    },
  },
});

Fields not listed in the mappings will still be indexed using dynamic mapping. Define mappings explicitly for fields where you need a specific type (e.g. keyword instead of text).

Custom settings

Pass settings to control shards, replicas, and analysis:

await client.indices.create({
  index: "products",
  settings: {
    number_of_shards: 2,
    number_of_replicas: 1,
    analysis: {
      analyzer: {
        lowercase_keyword: {
          type: "custom",
          tokenizer: "keyword",
          filter: ["lowercase"],
        },
      },
    },
  },
  mappings: {
    properties: {
      name: { type: "text" },
      sku: { type: "text", analyzer: "lowercase_keyword" },
    },
  },
});