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Nested stacktraces for Node.js! =============================== [](https://travis-ci.org/mdlavin/nested-error-stacks) [](http://badge.fury.io/js/nested-error-stacks) [](https://david-dm.org/mdlavin/nested-error-stacks) With this module, you can wrap a caught exception with extra context for better debugging. For example, a network error's stack would normally look like this: Error: connect ECONNREFUSED at errnoException (net.js:904:11) at Object.afterConnect [as oncomplete] (net.js:895:19) Using this module, you can wrap the Error with more context to get a stack that looks like this: NestedError: Failed to communicate with localhost:8080 at Socket.<anonymous> (/Users/mattlavin/Projects/nested-stacks/demo.js:6:18) at Socket.EventEmitter.emit (events.js:95:17) at net.js:440:14 at process._tickCallback (node.js:415:13) Caused By: Error: connect ECONNREFUSED at errnoException (net.js:904:11) at Object.afterConnect [as oncomplete] (net.js:895:19) How to wrap errors ------------------ Here is an example program that uses this module to add more context to errors: ```js var NestedError = require('nested-error-stacks'); var net = require('net'); var client = net.connect({port: 8080}); client.on('error', function (err) { var newErr = new NestedError("Failed to communicate with localhost:8080", err); console.log(newErr.stack); }); ``` How to inherit -------------- It is recomennded to use explicit names for Error classes. You can do it like this: ```js var util = require('util'); var NestedError = require('nested-error-stacks'); function MyError(message, nested) { NestedError.call(this, message, nested); } util.inherits(MyError, NestedError); MyError.prototype.name = 'MyError'; ```
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