proj4js | JavaScript library to transform coordinates | Map library

How can I convert geo coordinates from WGS 84 to UTM using JavaScript?

I tried using proj4js, but it yields these coordinates: 32U 5114272 1633427, whereas external sources tell us, that 32U 688260 5338516 would be correct.

Good people of stackoverflow.

I would like to write a custom function in google sheets for coordinate transformation. The function shuld transform coordinates in Slovene natioanl grid (EPSG: 3912) to WGS84 (EPSG: 4326). I think that this could be elegantly done with proj4js library.

But since I am complety new to javascript and Google app scripts I am wondering if it is possible to import a library to app scripts. I found out that proj4js is hosted on cdnjs and could be directly used in browser applications but I dont know how to import it in Google app scripts.

I tried to add this library by Script ID, where I used the proj4js cdnjs links as Script ID but I got an error: "Unable to look up library. Check the ID and access permissions and try again."

I would be really gratefull if anybody could help me overcome this rookie obstacle.

I need to add layers from geojson files projected as NSIDC ease-Grid North /South or WGS84-NSIDC Sea Ice Polar Stereographic North /South to my map. The map is the Ocean Base Map from Esri (see Esri map source)

The actual map is visible to this link for your reference (actual map). The map is now projected with a EPSG:3857 projection, but I should change it to one of the above projection in order to visualize correctly the layers that I have to add.

Following the documentation in OpenLayers 4, I tried to create a simple html document before implementing the reProjection commands (I should actually add the possibility to change between one map projection to the other one, when dealing with polar layers), in order to check which is the best projection to be used, as follows:

i m trying make world map, on hover tooltip with custom values.

However although map looks fine, but i couldn't able to add custom values and replace the '0' showing on the tooltip upon hover.

My code so far :

Have a dataset of global data with lat/lon info and can display a map of type 'mapbubble.'

Say, however, I only want to display one country. Currently if I use this dataset and display with say, Canada or China, the image of the country shrinks so as to allow all the points -- from all over the world -- to display.

Is there a way to tell Highmap to not display data that is not within the bounds of the current map?

Thanks!

Update: adding sample code. Note that the 4th point is the north pole and not part of China, yet it is displayed (oddly, far to the left and with the bubble not AFAIK the right size).