nodejs crtl c does not exit

During the development process using Node.js, we sometimes encounter a strange problem: using Ctrl C on the command line cannot exit the program. This problem is very troublesome, because we usually use Ctrl C to interrupt the running program or exit the current command line. Let’s discuss this problem and its solution below.

Cause of the problem

In Node.js, we usually use the process module to handle process-related operations. This module provides many useful methods, such as process.exit() to exit the current process. If we want to listen to user input in the program, we can use process.stdin to read user input.

However, when we use process.stdin to read user input, if the user input interrupt signal (such as Ctrl C) is not processed, the program will fall into an infinite loop and be unable to respond. Interrupt signal to exit the program. This is because the user inputting Ctrl C actually sends an interrupt signal, and the default behavior of Node.js is not to handle the interrupt signal, and the process will continue to run.

Solution

So, how to deal with this problem? In fact, it is very simple to solve this problem. We only need to manually listen for the interrupt signal and handle it in the program. Here is a sample code:

process.on('SIGINT', function() {
  console.log('Received SIGINT. Exiting...');
  process.exit(0);
});

This code simply listens for the interrupt signal (SIGINT) and outputs a message when the signal is received and exits the current process using process.exit() . In this way, when the user uses Ctrl C, the process will exit correctly.

Summary

The above is the reason and solution for why Ctrl C cannot be used to exit the program in Node.js. By manually listening for interrupt signals in the program, we can ensure that the program responds to user input correctly and exits. In actual development, we should pay attention to this problem to avoid the trouble caused by it.

The above is the detailed content of nodejs crtl c does not exit. For more information, please follow other related articles on the PHP Chinese website!