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	"readme": "# is-data-descriptor [![NPM version](https://img.shields.io/npm/v/is-data-descriptor.svg?style=flat)](https://www.npmjs.com/package/is-data-descriptor) [![NPM monthly downloads](https://img.shields.io/npm/dm/is-data-descriptor.svg?style=flat)](https://npmjs.org/package/is-data-descriptor) [![NPM total downloads](https://img.shields.io/npm/dt/is-data-descriptor.svg?style=flat)](https://npmjs.org/package/is-data-descriptor) [![Linux Build Status](https://img.shields.io/travis/jonschlinkert/is-data-descriptor.svg?style=flat&label=Travis)](https://travis-ci.org/jonschlinkert/is-data-descriptor)\n\n> Returns true if a value has the characteristics of a valid JavaScript data descriptor.\n\nPlease consider following this project's author, [Jon Schlinkert](https://github.com/jonschlinkert), and consider starring the project to show your :heart: and support.\n\n## Install\n\nInstall with [npm](https://www.npmjs.com/):\n\n```sh\n$ npm install --save is-data-descriptor\n```\n\n## Usage\n\n```js\nvar isDataDesc = require('is-data-descriptor');\n```\n\n## Examples\n\n`true` when the descriptor has valid properties with valid values.\n\n```js\n// `value` can be anything\nisDataDesc({value: 'foo'})\nisDataDesc({value: function() {}})\nisDataDesc({value: true})\n//=> true\n```\n\n`false` when not an object\n\n```js\nisDataDesc('a')\n//=> false\nisDataDesc(null)\n//=> false\nisDataDesc([])\n//=> false\n```\n\n`false` when the object has invalid properties\n\n```js\nisDataDesc({value: 'foo', bar: 'baz'})\n//=> false\nisDataDesc({value: 'foo', bar: 'baz'})\n//=> false\nisDataDesc({value: 'foo', get: function(){}})\n//=> false\nisDataDesc({get: function(){}, value: 'foo'})\n//=> false\n```\n\n`false` when a value is not the correct type\n\n```js\nisDataDesc({value: 'foo', enumerable: 'foo'})\n//=> false\nisDataDesc({value: 'foo', configurable: 'foo'})\n//=> false\nisDataDesc({value: 'foo', writable: 'foo'})\n//=> false\n```\n\n## Valid properties\n\nThe only valid data descriptor properties are the following:\n\n* `configurable` (required)\n* `enumerable` (required)\n* `value` (optional)\n* `writable` (optional)\n\nTo be a valid data descriptor, either `value` or `writable` must be defined.\n\n**Invalid properties**\n\nA descriptor may have additional _invalid_ properties (an error will **not** be thrown).\n\n```js\nvar foo = {};\n\nObject.defineProperty(foo, 'bar', {\n  enumerable: true,\n  whatever: 'blah', // invalid, but doesn't cause an error\n  get: function() {\n    return 'baz';\n  }\n});\n\nconsole.log(foo.bar);\n//=> 'baz'\n```\n\n## About\n\n<details>\n<summary><strong>Contributing</strong></summary>\n\nPull requests and stars are always welcome. For bugs and feature requests, [please create an issue](../../issues/new).\n\n</details>\n\n<details>\n<summary><strong>Running Tests</strong></summary>\n\nRunning and reviewing unit tests is a great way to get familiarized with a library and its API. You can install dependencies and run tests with the following command:\n\n```sh\n$ npm install && npm test\n```\n\n</details>\n\n<details>\n<summary><strong>Building docs</strong></summary>\n\n_(This project's readme.md is generated by [verb](https://github.com/verbose/verb-generate-readme), please don't edit the readme directly. Any changes to the readme must be made in the [.verb.md](.verb.md) readme template.)_\n\nTo generate the readme, run the following command:\n\n```sh\n$ npm install -g verbose/verb#dev verb-generate-readme && verb\n```\n\n</details>\n\n### Related projects\n\nYou might also be interested in these projects:\n\n* [is-accessor-descriptor](https://www.npmjs.com/package/is-accessor-descriptor): Returns true if a value has the characteristics of a valid JavaScript accessor descriptor. | [homepage](https://github.com/jonschlinkert/is-accessor-descriptor \"Returns true if a value has the characteristics of a valid JavaScript accessor descriptor.\")\n* [is-data-descriptor](https://www.npmjs.com/package/is-data-descriptor): Returns true if a value has the characteristics of a valid JavaScript data descriptor. | [homepage](https://github.com/jonschlinkert/is-data-descriptor \"Returns true if a value has the characteristics of a valid JavaScript data descriptor.\")\n* [is-descriptor](https://www.npmjs.com/package/is-descriptor): Returns true if a value has the characteristics of a valid JavaScript descriptor. Works for… [more](https://github.com/jonschlinkert/is-descriptor) | [homepage](https://github.com/jonschlinkert/is-descriptor \"Returns true if a value has the characteristics of a valid JavaScript descriptor. Works for data descriptors and accessor descriptors.\")\n* [isobject](https://www.npmjs.com/package/isobject): Returns true if the value is an object and not an array or null. | [homepage](https://github.com/jonschlinkert/isobject \"Returns true if the value is an object and not an array or null.\")\n\n### Contributors\n\n| **Commits** | **Contributor** | \n| --- | --- |\n| 21 | [jonschlinkert](https://github.com/jonschlinkert) |\n| 2 | [realityking](https://github.com/realityking) |\n\n### Author\n\n**Jon Schlinkert**\n\n* [github/jonschlinkert](https://github.com/jonschlinkert)\n* [twitter/jonschlinkert](https://twitter.com/jonschlinkert)\n\n### License\n\nCopyright © 2017, [Jon Schlinkert](https://github.com/jonschlinkert).\nReleased under the [MIT License](LICENSE).\n\n***\n\n_This file was generated by [verb-generate-readme](https://github.com/verbose/verb-generate-readme), v0.6.0, on November 01, 2017._"
}