What are primordials in Node.js?

Question

I've just started to read Node.js source code, and something that I notice quite a lot is the use of an object called primordials. But I can't seem find where its definition is.

E.g: /node/lib/events.js

const {
  Array,
  Boolean,
  Error,
  MathMin,
  NumberIsNaN,
  ObjectCreate,
  ObjectDefineProperty,
  ObjectGetPrototypeOf,
  ObjectSetPrototypeOf,
  ObjectKeys,
  Promise,
  PromiseReject,
  PromiseResolve,
  ReflectApply,
  ReflectOwnKeys,
  Symbol,
  SymbolFor,
  SymbolAsyncIterator
} = primordials;

Can someone explain what primordials are and where it is declared?

Answer 1

Some brief research revealed this github issue leading to this node source file with some enlightening comments about the purpose of primordials:

// This file subclasses and stores the JS builtins that come from the VM
// so that Node.js's builtin modules do not need to later look these up from
// the global proxy, which can be mutated by users.

So, as mentioned in the issue, the primordials object is meant to be a way to guarantee that node builtin modules can access the true untampered globals instead of ones which may have been modified by users.