Calling the GeographicLib C++ library from JavaScript
The geodesic routines in GeographicLib have been implemented in JavaScript package geographiclib-geodesic. For documentation, see
https://geographiclib.sourceforge.io/JavaScript/doc
William Wall wallw@users.sourceforge.net has posted a method of automatically translating the C++ code into JavaScript
https://sourceforge.net/p/geographiclib/discussion/1026620/thread/f6f6b9ff/
This will let you use other capabilities of GeographicLib in JavaScript.
This is implemented in OpenSphere ASM.