Package Exports

utils-copy-error

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Readme

Copy Error

Copy an error object.

Installation

$ npm install utils-copy-error

Usage

var copy = require( 'utils-copy-error' );

copy( error )

Copy an error object.

var err1 = new TypeError( 'beep' );

var err2 = copy( err1 );
// returns <TypeError>

Notes

Supported built-in error types:
- Error
- ```
[`URIError`][js-uri-error]
```
- ReferenceError
- SyntaxError
- RangeError
- EvalError
- TypeError
- System Error (Node.js)
The function also supports custom error types which are Error instances (e.g., ES2015 subclasses).
The function deep copies over all enumerable properties, including property descriptors.

Examples

var copy = require( 'utils-copy-error' );

var err1;
var err2;

err1 = new Error( 'beep' );
err2 = copy( err1 );

console.log( err1 === err2 );
// returns false

console.log( err1.message === err2.message );
// returns true

err1 = new TypeError( 'bad type' );
err2 = copy (err1 );

console.log( err1 === err2 );
// returns false

console.log( err1.stack === err2.stack );
// returns true

err1 = new RangeError( 'invalid value' );
err2 = copy( err1 );

console.log( err1 === err2 );
// returns false

console.log( err1.name === err2.name );
// returns true

To run the example code from the top-level application directory,

$ node ./examples/index.js

Tests

Unit

This repository uses tape for unit tests. To run the tests, execute the following command in the top-level application directory:

$ make test

All new feature development should have corresponding unit tests to validate correct functionality.

Test Coverage

This repository uses Istanbul as its code coverage tool. To generate a test coverage report, execute the following command in the top-level application directory:

$ make test-cov

Istanbul creates a ./reports/coverage directory. To access an HTML version of the report,

$ make view-cov

Browser Support

This repository uses Testling for browser testing. To run the tests in a (headless) local web browser, execute the following command in the top-level application directory:

$ make test-browsers

To view the tests in a local web browser,

$ make view-browser-tests

License

MIT license.

utils-copy-error