loynoir / atexit.js Goto Github PK

atexit.js, Python standard library atexit shipped to Node.js.

• Let you register cleanup functions.

• Executed in last-in-first-out order when exit.

Which means, "If you register A, B, and C, at interpreter termination time they will be run in the order C, B, A."

npm i loynoir/atexit.js

// for ESM
import atexit from "atexit"
// for CJS
const atexit = require("atexit");

console.log('open outer door')
// pass arguments
atexit.register(console.log, 'close outer door')

console.log('open inner door')
// pass no argument
atexit.register(()=>console.log('close inner door'))

// Last-in-first-out
/*
open outer door
open inner door
close inner door
close outer door
*/

// when a cleanup function is no more needed, you can unregister it
atexit.unregiter(cleanup_func)

If you want to control in first-in-first-out order, you may use sindresorhus/exit-hook.

In atexit.js, "it is possible to register the same function and arguments more than once", "all exit handlers have had a chance to run", just like what python standard atexit does.

# First-in-first-out
$ examples/example_exit-hook.js
borrow a space ship from 👽
goto mars 🚀
one night on mars 🌙
exit-hook : return a space ship ⏲
exit-hook : went back from mars 👋
exit-hook : wakeup on mars 🌞

# Last-in-first-out
$ examples/example_atexit.py
borrow a space ship from 👽
goto mars 🚀
one night on mars 🌙
atexit.py : wakeup on mars 🌞
atexit.py : went back from mars 👋
atexit.py : return a space ship ⏲

# Last-in-first-out
$ examples/example_atexit.js
borrow a space ship from 👽
goto mars 🚀
one night on mars 🌙
atexit.js : wakeup on mars 🌞
atexit.js : went back from mars 👋
atexit.js : return a space ship ⏲

• sindresorhus/exit-hook - First-in-first-out.

• loynoir/atexit.js - Last-in-first-out.

• Python atexit - Python standard library. Last-in-first-out.

• Golang defer - Golang standard keyword. "Deferred calls are executed in last-in-first-out order."

Modified from sindresorhus/exit-hook