Can io.emit('connection') be used?

Question

Node.js

Is it possible to write io.emit('connection'); at the end of the code? ?//connection - loading data when entering the site
That is, reloading all the information about the site. (In the beginning it says io.on('connection');
Or does it not work?
The goal is to re-update all the data, which are written in io.on('connection')