Adding server-side libraries for javascript

I am currently coding my offline game into an online game by use of node.js and socket.io

In my game, I use vectors from a library called p5.js to store position of player, collision related movement, etc.

However, the server side (a txt file called "server.js") does not have p5.js like the client, so I can't send information about the player's with vectors.

Here is my question: How could I make the server.js file have access to my p5.js library?

Note: Simply sending x and y values, and then using them to make a vector would be a difficult solution, as I would no longer be able to send a single array holding all the information of all players. Also, enemies, food, trail positions, and much more also depend on vectors. Coverting all of these would be difficult to code.

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