├── .gitignore ├── dist └── index.es5.js ├── index.es2015.js ├── license.md ├── package.json └── readme.md /.gitignore: -------------------------------------------------------------------------------- 1 | node_modules/ 2 | -------------------------------------------------------------------------------- /dist/index.es5.js: -------------------------------------------------------------------------------- 1 | "use strict"; 2 | 3 | function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } } 4 | 5 | function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; } 6 | 7 | function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; } 8 | 9 | function _extendableBuiltin(cls) { 10 | function ExtendableBuiltin() { 11 | var instance = Reflect.construct(cls, Array.from(arguments)); 12 | Object.setPrototypeOf(instance, Object.getPrototypeOf(this)); 13 | return instance; 14 | } 15 | 16 | ExtendableBuiltin.prototype = Object.create(cls.prototype, { 17 | constructor: { 18 | value: cls, 19 | enumerable: false, 20 | writable: true, 21 | configurable: true 22 | } 23 | }); 24 | 25 | if (Object.setPrototypeOf) { 26 | Object.setPrototypeOf(ExtendableBuiltin, cls); 27 | } else { 28 | ExtendableBuiltin.__proto__ = cls; 29 | } 30 | 31 | return ExtendableBuiltin; 32 | } 33 | 34 | var ExtendableError = function (_extendableBuiltin2) { 35 | _inherits(ExtendableError, _extendableBuiltin2); 36 | 37 | function ExtendableError(message) { 38 | _classCallCheck(this, ExtendableError); 39 | 40 | var _this = _possibleConstructorReturn(this, Object.getPrototypeOf(ExtendableError).call(this, message)); 41 | 42 | _this.name = _this.constructor.name; 43 | _this.message = message; 44 | if (typeof Error.captureStackTrace === 'function') { 45 | Error.captureStackTrace(_this, _this.constructor); 46 | } else { 47 | _this.stack = new Error(message).stack; 48 | } 49 | return _this; 50 | } 51 | 52 | return ExtendableError; 53 | }(_extendableBuiltin(Error)); 54 | 55 | module.exports = ExtendableError; 56 | 57 | -------------------------------------------------------------------------------- /index.es2015.js: -------------------------------------------------------------------------------- 1 | "use strict"; 2 | 3 | const ExtendableError = class extends Error { 4 | constructor(message) { 5 | super(message); 6 | this.name = this.constructor.name; 7 | this.message = message; 8 | if (typeof Error.captureStackTrace === 'function') { 9 | Error.captureStackTrace(this, this.constructor); 10 | } else { 11 | this.stack = (new Error(message)).stack; 12 | } 13 | } 14 | }; 15 | 16 | module.exports = ExtendableError; 17 | -------------------------------------------------------------------------------- /license.md: -------------------------------------------------------------------------------- 1 | CC0 1.0 Universal 2 | 3 | Statement of Purpose 4 | 5 | The laws of most jurisdictions throughout the world automatically confer 6 | exclusive Copyright and Related Rights (defined below) upon the creator and 7 | subsequent owner(s) (each and all, an "owner") of an original work of 8 | authorship and/or a database (each, a "Work"). 9 | 10 | Certain owners wish to permanently relinquish those rights to a Work for the 11 | purpose of contributing to a commons of creative, cultural and scientific 12 | works ("Commons") that the public can reliably and without fear of later 13 | claims of infringement build upon, modify, incorporate in other works, reuse 14 | and redistribute as freely as possible in any form whatsoever and for any 15 | purposes, including without limitation commercial purposes. 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Affirmer understands and acknowledges that Creative Commons is not a 112 | party to this document and has no duty or obligation with respect to this 113 | CC0 or use of the Work. 114 | 115 | For more information, please see 116 | 117 | -------------------------------------------------------------------------------- /package.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "extendable-error-class", 3 | "version": "0.1.2", 4 | "description": "Extend the Error Class with ES2015/ES5/Babel, i.e. fix for `class MyError extends Error{}`", 5 | "repository": "github:brillout/extendable-error-class", 6 | "main": "dist/index.es5.js", 7 | "babel": { 8 | "presets": [ 9 | "es2015" 10 | ], 11 | "plugins": [ 12 | [ 13 | "babel-plugin-transform-builtin-extend", 14 | { 15 | "globals": [ 16 | "Error" 17 | ] 18 | } 19 | ] 20 | ] 21 | }, 22 | "scripts": { 23 | "build": "./node_modules/.bin/babel index.es2015.js > dist/index.es5.js" 24 | }, 25 | "dependencies": {}, 26 | "devDependencies": { 27 | "babel-cli": "^6.11.4", 28 | "babel-plugin-transform-builtin-extend": "^1.1.0", 29 | "babel-preset-es2015": "^6.9.0" 30 | }, 31 | "license": "CC0-1.0" 32 | } 33 | -------------------------------------------------------------------------------- /readme.md: -------------------------------------------------------------------------------- 1 | #### Usage 2 | 3 | ```js 4 | const ExtendableError = require('extendable-error-class'); 5 | 6 | class MyError extends ExtendableError { 7 | constructor(m) { 8 | super(m); 9 | 10 | // Optional - ExtendableError sets `name` to your class's name itself, 11 | // but minification, etc. can change that, so you may want to do it 12 | // explicitly. 13 | this.name = 'MyError'; 14 | } 15 | } 16 | 17 | ``` 18 | `extendable-error-class` has no dependencies. 19 | 20 | 21 | ### Why 22 | 23 | Because the following doesn't work as expected. 24 | ```js 25 | class MyError extends Error { 26 | constructor(m) { 27 | super(m); 28 | } 29 | } 30 | ``` 31 | 32 | 33 | 34 | ### How 35 | 36 | The workaround is based on `babel-plugin-transform-builtin-extend` and following code 37 | 38 | ```js 39 | const ExtendableError = class extends Error { 40 | constructor(message) { 41 | super(message); 42 | this.name = this.constructor.name; 43 | this.message = message; 44 | if (typeof Error.captureStackTrace === 'function') { 45 | Error.captureStackTrace(this, this.constructor); 46 | } else { 47 | this.stack = (new Error(message)).stack; 48 | } 49 | } 50 | }; 51 | ``` 52 | 53 | The code is already compiled with `babel` and `babel-plugin-transform-builtin-extend`. Therefore one is able to use this workaround without adding any dependency. 54 | 55 | See http://stackoverflow.com/questions/31089801/extending-error-in-javascript-with-es6-syntax 56 | --------------------------------------------------------------------------------