<dependency>
  <groupId>org.webjars.npm</groupId>
  <artifactId>base64-js</artifactId>
  <version>1.3.1</version>
</dependency>

implementation 'org.webjars.npm:base64-js:1.3.1'

implementation("org.webjars.npm:base64-js:1.3.1")

libraryDependencies += "org.webjars.npm" % "base64-js" % "1.3.1"

@Grapes(
  @Grab(group='org.webjars.npm', module='base64-js', version='1.3.1')
)

<dependency org="org.webjars.npm" name="base64-js" rev="1.3.1" />

[org.webjars.npm/base64-js "1.3.1"]

'org.webjars.npm:base64-js:jar:1.3.1'