I confinrm lot of problems with rounding issues in javascript, the tests should ALL be rewritten to allow solution in a range and not exact number to cover all the floating point math implementation

It is possible to support scala directly? Considering you are supporting already Java (and so you must have a JVM running somewhere) it should be easy

Can you support directly Typescript? It should be very easy, just compile with tsc the code submitted and run it in node as you do with javascript, probably it would require just some minutes of work to implement it