This content originally appeared on DEV Community and was authored by Randall
Here's a funny (and really unimportant) thing I discovered about Node.js today.
First, for anyone who may not know, if you ever want to see the source code of a JavaScript function, you can just call .toString() on the function. (if it's a JavaScript function, and not one that's implemented in native code inside of the JS engine itself)
Let's try it on process.exit:
console.log(process.exit.toString());
Here's what we get as output:
function exit(code) {
if (code || code === 0)
process.exitCode = code;
if (!process._exiting) {
process._exiting = true;
process.emit('exit', process.exitCode || 0);
}
// FIXME(joyeecheung): This is an undocumented API that gets monkey-patched
// in the user land. Either document it, or deprecate it in favor of a
// better public alternative.
process.reallyExit(process.exitCode || 0);
}
It turns out that process.exit() is just a thin wrapper around another function, process.reallyExit()! process.reallyExit() is a native function, so we can't inspect its code in this manner (but you can find it in Node's source code on GitHub if you're interested).
This tickled me. It's a good reminder that there are always some funny, hacky things in the technologies we know and love.
This content originally appeared on DEV Community and was authored by Randall
Randall | Sciencx (2021-10-13T01:29:43+00:00) 🚪 Really exit!. Retrieved from https://www.scien.cx/2021/10/13/%f0%9f%9a%aa-really-exit/
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