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