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What is process exit in node JS?
The process. exit() method is used to end the process which is running at the same time with an exit code in NodeJS. Syntax: process.exit( code ) Parameter: This function accepts single parameter as mentioned above and described below: Code: It can be either 0 or 1.
How do node JS servers work?
Node is completely event-driven. Basically the server consists of one thread processing one event after another. A new request coming in is one kind of event. The server starts processing it and when there is a blocking IO operation, it does not wait until it completes and instead registers a callback function.
How do I end a node process?
If you’re in a Unix terminal or Windows command line and want to exit the Node REPL, either…
- Press Ctrl + C twice, or.
- type .exit and press Enter, or.
- press Ctrl + D at the start of a line (Unix only)
What does the exit code mean in Node.js?
By default the exit code is 0, which means success. Different exit codes have different meaning, which you might want to use in your own system to have the program communicate to other programs. You can also set the process.exitCode property: and when the program ends, Node.js will return that exit code.
What does the res object in Node.js mean?
The res object represents the HTTP response that an Express app sends when it gets an HTTP request. Following is the list of few properties associated with response object. res.app. This property holds a reference to the instance of the express application that is using the middleware.
What happens when you run a line in Node.js?
When Node.js runs this line, the process is immediately forced to terminate. This means that any callback that’s pending, any network request still being sent, any filesystem access, or processes writing to stdout or stderr – all is going to be ungracefully terminated right away.
How does an express node work in a web application?
In a traditional data-driven website, a web application waits for HTTP requests from the web browser (or other client). When a request is received the application works out what action is needed based on the URL pattern and possibly associated information contained in POST data or GET data.