The JavaScript language plugin allows to have javascript as the language of scripts to execute.
'org.elasticsearch:elasticsearch-lang-javascript:2.6.0'
<dependency>
<groupId>org.elasticsearch</groupId>
<artifactId>elasticsearch-lang-javascript</artifactId>
<version>2.6.0</version>
</dependency>
<dependency org="org.elasticsearch" name="elasticsearch-lang-javascript" rev="2.6.0"/>
"org.elasticsearch", "elasticsearch-lang-javascript", "2.6.0"