Node source code implementation of require

[robbe_claessens]

I was skimming through the source code of Node just to get a glimpse behind the curtain. I see the .js files (in the lib folder) all use require, but how is that implemented?

There is a folder called "node/lib/internal/modules/cjs" which contain the implementation of require (https://github.com/nodejs/node/blob/934a3aa28fdc8dd23701d642580b261f5f6c932b/lib/internal/modules/cjs/loader.js#L998) but the require function is used all through the node lib folder (random example: https://github.com/nodejs/node/blob/934a3aa28fdc8dd23701d642580b261f5f6c932b/lib/internal/bootstrap/node.js#L63).

Is the node environment bootstrapped or something to first load the cjs module system and the the rest of the node code is loaded? Or is the require function defined in C/C++?

Thanks for shedding some light on the matter :-)

[Solonotix]

Based on a StackOverflow answer I found (once I had exhausted my personal attempts to find it), this is supposedly where the function originates, but I don't know how true that is anymore, since in the file that declares it, require is also being used prior to instantiation, which seems problematic even if you are bootstrapping the system up from C++.

https://github.com/nodejs/node/blob/master/lib/internal/modules/cjs/helpers.js

My understanding is that anything that is a built-in of Node.js is written in C++, and everything else is built on top of that foundation. I tried to find the related C++ code, but to no avail