newerror

Create Error subclasses without sweating it!

How?

var newError = require('newerror');
 
var StuffError = newError('StuffError');
 
// [...]
try {
    throw new StuffError();
} catch (e) {
    console.log(e instanceof StuffError); // true
}

Why?

Creating a new Error subclass is quite easy, but there are some things you shouldn't forget:

• The stack has to be re-created or the stack trace is lost.
• The prototype has to be correctly set.
• The name property has to be correctly set.

So this module is just to ease the creation of Error subclasses, and never get it wrong.

API

The newError function takes 2 arguments:

• type: the name of the new Error subclass.
• message: the default message when an error is thrown.

To use this function:

var newError = require('newerror');
 
var StuffError = newError('StuffError', 'test');
throw new StuffError(); // "StuffError: test"
throw new StuffError('another test'); // "StuffError: another test"

Contributors

• Florian Margaine

License

MIT License.