libmozjs-38-dev 38.2.1~rc0-0ubuntu4 (arm64 binary) in ubuntu zesty

 SpiderMonkey is the code-name for the Mozilla's C++ implementation of
 JavaScript. It is intended to be embedded in other applications
 that provide host environments for JavaScript.
 .
 This package contains the header files and static library which is
 needed for developing Spidermonkey embedders.