elasticsearch-js/docs/reference/api/BulkWriteOperation.md

Interface BulkWriteOperation

Name	Type	Description
dynamic_templates	Record<string, string>	A map from the full name of fields to the name of dynamic templates. It defaults to an empty map. If a name matches a dynamic template, that template will be applied regardless of other match predicates defined in the template. If a field is already defined in the mapping, then this parameter won't be used.
pipeline	string	The ID of the pipeline to use to preprocess incoming documents. If the index has a default ingest pipeline specified, setting the value to _none turns off the default ingest pipeline for this request. If a final pipeline is configured, it will always run regardless of the value of this parameter.
require_alias	boolean	If true, the request's actions must target an index alias.