How to throw an error in Node

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To throw an error in Node.js, you instantiate a new Error object and throw it …

throw new Error('Something is wrong');

where ‘Something is wrong’ is your error message.  If the error is uncaught, the application will terminate at point, printing out a stack trace.

To catch exceptions, you can do …

process.on('uncaughtException', function(err) {
    console.error(err);
    process.exit(1);
});
throw new Error('Something is wrong');

Or you can bound it withing a try clause as in …

try {
	console.log("doing something");
	throw new Error('But something went wrong');

} catch ( e ) {
	console.log("We continue here despite our error: " + e);
}

And so that is how you throw an Error in Node and catching it.

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