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Elasticsearch JavaScript Client
https://www.elastic.co/guide/en/elasticsearch/client/javascript-api/current/changelog-client.html

Elasticsearch JavaScript Client release notes [elasticsearch-javascript-client-release-notes]

Review the changes, fixes, and more in each version of Elasticsearch JavaScript Client.

To check for security updates, go to Security announcements for the Elastic stack.

% Release notes include only features, enhancements, and fixes. Add breaking changes, deprecations, and known issues to the applicable release notes sections.

% ## version.next [elasticsearch-javascript-client-next-release-notes]

% ### Features and enhancements [elasticsearch-javascript-client-next-features-enhancements] % *

% ### Fixes [elasticsearch-javascript-client-next-fixes] % *

9.0.0 [elasticsearch-javascript-client-900-release-notes]

Features and enhancements [elasticsearch-javascript-client-900-features-enhancements]

  • Compatibility with Elasticsearch 9.0: All changes and additions to Elasticsearch APIs for its 9.0 release are reflected in this release.

  • Serverless client merged in: the @elastic/elasticsearch-serverless client is being deprecated, and its functionality has been merged back into this client. This should have zero impact on the way the client works by default, except that a new serverMode option has been added. When it's explicitly set to "serverless" by a user, a few default settings and behaviors are changed:

    • turns off sniffing and ignores any sniffing-related options
    • ignores all nodes passed in config except the first one, and ignores any node filtering and selecting options
    • enables compression and TLSv1_2_method (same as when configured for Elastic Cloud)
    • adds an elastic-api-version HTTP header to all requests
    • uses CloudConnectionPool by default instead of WeightedConnectionPool
    • turns off vendored content-type and accept headers in favor or standard MIME types

    Docstrings for types that differ between stack and serverless have also been updated to indicate when that is the case.

% ### Fixes [elasticsearch-javascript-client-900-fixes]