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"readme": "<h1 align=center>\n <a href=\"http://chaijs.com\" title=\"Chai Documentation\">\n <img alt=\"ChaiJS\" src=\"http://chaijs.com/img/chai-logo.png\"/> check-error\n </a>\n</h1>\n\n<p align=center>\n Error comparison and information related utility for <a href=\"http://nodejs.org\">node</a> and the browser.\n</p>\n\n<p align=center>\n <a href=\"./LICENSE\">\n <img\n alt=\"license:mit\"\n src=\"https://img.shields.io/badge/license-mit-green.svg?style=flat-square\"\n />\n </a>\n <a href=\"https://github.com/chaijs/check-error/releases\">\n <img\n alt=\"tag:?\"\n src=\"https://img.shields.io/github/tag/chaijs/check-error.svg?style=flat-square\"\n />\n </a>\n <a href=\"https://travis-ci.org/chaijs/check-error\">\n <img\n alt=\"build:?\"\n src=\"https://img.shields.io/travis/chaijs/check-error/master.svg?style=flat-square\"\n />\n </a>\n <a href=\"https://coveralls.io/r/chaijs/check-error\">\n <img\n alt=\"coverage:?\"\n src=\"https://img.shields.io/coveralls/chaijs/check-error/master.svg?style=flat-square\"\n />\n </a>\n <a href=\"https://www.npmjs.com/packages/check-error\">\n <img\n alt=\"npm:?\"\n src=\"https://img.shields.io/npm/v/check-error.svg?style=flat-square\"\n />\n </a>\n <a href=\"https://www.npmjs.com/packages/check-error\">\n <img\n alt=\"dependencies:?\"\n src=\"https://img.shields.io/npm/dm/check-error.svg?style=flat-square\"\n />\n </a>\n <a href=\"\">\n <img\n alt=\"devDependencies:?\"\n src=\"https://img.shields.io/david/chaijs/check-error.svg?style=flat-square\"\n />\n </a>\n <br/>\n <a href=\"https://saucelabs.com/u/chaijs-check-error\">\n <img\n alt=\"Selenium Test Status\"\n src=\"https://saucelabs.com/browser-matrix/chaijs-check-error.svg\"\n />\n </a>\n <br>\n <a href=\"https://chai-slack.herokuapp.com/\">\n <img\n alt=\"Join the Slack chat\"\n src=\"https://img.shields.io/badge/slack-join%20chat-E2206F.svg?style=flat-square\"\n />\n </a>\n <a href=\"https://gitter.im/chaijs/chai\">\n <img\n alt=\"Join the Gitter chat\"\n src=\"https://img.shields.io/badge/gitter-join%20chat-D0104D.svg?style=flat-square\"\n />\n </a>\n</p>\n\n## What is Check-Error?\n\nCheck-Error is a module which you can use to retrieve an Error's information such as its `message` or `constructor` name and also to check whether two Errors are compatible based on their messages, constructors or even instances.\n\n## Installation\n\n### Node.js\n\n`check-error` is available on [npm](http://npmjs.org). To install it, type:\n\n $ npm install check-error\n\n### Browsers\n\nYou can also use it within the browser; install via npm and use the `check-error.js` file found within the download. For example:\n\n```html\n<script src=\"./node_modules/check-error/check-error.js\"></script>\n```\n\n## Usage\n\nThe primary export of `check-error` is an object which has the following methods:\n\n* `compatibleInstance(err, errorLike)` - Checks if an error is compatible with another `errorLike` object. If `errorLike` is an error instance we do a strict comparison, otherwise we return `false` by default, because instances of objects can only be compatible if they're both error instances.\n* `compatibleConstructor(err, errorLike)` - Checks if an error's constructor is compatible with another `errorLike` object. If `err` has the same constructor as `errorLike` or if `err` is an instance of `errorLike`.\n* `compatibleMessage(err, errMatcher)` - Checks if an error message is compatible with an `errMatcher` RegExp or String (we check if the message contains the String).\n* `getConstructorName(errorLike)` - Retrieves the name of a constructor, an error's constructor or `errorLike` itself if it's not an error instance or constructor.\n* `getMessage(err)` - Retrieves the message of an error or `err` itself if it's a String. If `err` or `err.message` is undefined we return an empty String.\n\n```js\nvar checkError = require('check-error');\n```\n\n#### .compatibleInstance(err, errorLike)\n\n```js\nvar checkError = require('check-error');\n\nvar funcThatThrows = function() { throw new TypeError('I am a TypeError') };\nvar caughtErr;\n\ntry {\n funcThatThrows();\n} catch(e) {\n caughtErr = e;\n}\n\nvar sameInstance = caughtErr;\n\ncheckError.compatibleInstance(caughtErr, sameInstance); // true\ncheckError.compatibleInstance(caughtErr, new TypeError('Another error')); // false\n```\n\n#### .compatibleConstructor(err, errorLike)\n\n```js\nvar checkError = require('check-error');\n\nvar funcThatThrows = function() { throw new TypeError('I am a TypeError') };\nvar caughtErr;\n\ntry {\n funcThatThrows();\n} catch(e) {\n caughtErr = e;\n}\n\ncheckError.compatibleConstructor(caughtErr, Error); // true\ncheckError.compatibleConstructor(caughtErr, TypeError); // true\ncheckError.compatibleConstructor(caughtErr, RangeError); // false\n```\n\n#### .compatibleMessage(err, errMatcher)\n\n```js\nvar checkError = require('check-error');\n\nvar funcThatThrows = function() { throw new TypeError('I am a TypeError') };\nvar caughtErr;\n\ntry {\n funcThatThrows();\n} catch(e) {\n caughtErr = e;\n}\n\nvar sameInstance = caughtErr;\n\ncheckError.compatibleMessage(caughtErr, /TypeError$/); // true\ncheckError.compatibleMessage(caughtErr, 'I am a'); // true\ncheckError.compatibleMessage(caughtErr, /unicorn/); // false\ncheckError.compatibleMessage(caughtErr, 'I do not exist'); // false\n```\n\n#### .getConstructorName(errorLike)\n\n```js\nvar checkError = require('check-error');\n\nvar funcThatThrows = function() { throw new TypeError('I am a TypeError') };\nvar caughtErr;\n\ntry {\n funcThatThrows();\n} catch(e) {\n caughtErr = e;\n}\n\nvar sameInstance = caughtErr;\n\ncheckError.getConstructorName(caughtErr) // 'TypeError'\n```\n\n#### .getMessage(err)\n\n```js\nvar checkError = require('check-error');\n\nvar funcThatThrows = function() { throw new TypeError('I am a TypeError') };\nvar caughtErr;\n\ntry {\n funcThatThrows();\n} catch(e) {\n caughtErr = e;\n}\n\nvar sameInstance = caughtErr;\n\ncheckError.getMessage(caughtErr) // 'I am a TypeError'\n```\n",
"maintainers": [{ "name": "chaijs", "email": "chaijs@keithcirkel.co.uk" }],
"time": {
"modified": "2022-06-13T05:55:31.487Z",
"created": "2016-06-03T15:32:19.225Z",
"1.0.0": "2016-06-03T15:32:19.225Z",
"1.0.1": "2016-06-07T09:22:16.414Z",
"1.0.2": "2016-06-27T21:13:56.593Z"
},
"homepage": "https://github.com/chaijs/check-error#readme",
"keywords": ["check-error", "error", "chai util"],
"repository": {
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"url": "git+ssh://git@github.com/chaijs/check-error.git"
},
"contributors": [
{ "name": "David Losert", "url": "https://github.com/davelosert" },
{ "name": "Keith Cirkel", "url": "https://github.com/keithamus" },
{ "name": "Miroslav Bajtoš", "url": "https://github.com/bajtos" },
{
"name": "Lucas Fernandes da Costa",
"url": "https://github.com/lucasfcosta"
}
],
"author": {
"name": "Jake Luer",
"email": "jake@alogicalparadox.com",
"url": "http://alogicalparadox.com"
},
"bugs": { "url": "https://github.com/chaijs/check-error/issues" },
"license": "MIT",
"readmeFilename": "README.md",
"users": { "justjavac": true }
}
|
