Node js block script exit

block_exit_nodejs.ts

process.stdin.resume(); //so the program will not close instantly
const exitHandler = (options: { cleanup?: boolean; exit?: boolean }) => (exitCode?: any) => {
  if (options.cleanup) console.log('clean');
  if (exitCode || exitCode === 0) console.log(exitCode);
  if (options.exit) process.exit();
};
//do something when app is closing
process.on('exit', exitHandler({ cleanup: true }));
['SIGINT', 'SIGTERM', 'SIGUSR1', 'SIGUSR2', 'uncaughtException']
  .forEach((it: any) => process.on(it, exitHandler({ exit: true })));