Returns true if a value has the characteristics of a valid JavaScript descriptor. Works for data descriptors and accessor descriptors.
Install with npm:
$ npm install --save is-descriptorvar isDescriptor = require('is-descriptor');
isDescriptor({value: 'foo'})
//=> true
isDescriptor({get: function(){}, set: function(){}})
//=> true
isDescriptor({get: 'foo', set: function(){}})
//=> falseYou may also check for a descriptor by passing an object as the first argument and property name (string) as the second argument.
var obj = {};
obj.foo = 'abc';
Object.defineProperty(obj, 'bar', {
value: 'xyz'
});
isDescriptor(obj, 'foo');
//=> true
isDescriptor(obj, 'bar');
//=> truefalse when not an object
isDescriptor('a');
//=> false
isDescriptor(null);
//=> false
isDescriptor([]);
//=> falsetrue when the object has valid properties with valid values.
isDescriptor({value: 'foo'});
//=> true
isDescriptor({value: noop});
//=> truefalse when the object has invalid properties
isDescriptor({value: 'foo', bar: 'baz'});
//=> false
isDescriptor({value: 'foo', bar: 'baz'});
//=> false
isDescriptor({value: 'foo', get: noop});
//=> false
isDescriptor({get: noop, value: noop});
//=> falsefalse when a value is not the correct type
isDescriptor({value: 'foo', enumerable: 'foo'});
//=> false
isDescriptor({value: 'foo', configurable: 'foo'});
//=> false
isDescriptor({value: 'foo', writable: 'foo'});
//=> falsetrue when the object has valid properties with valid values.
isDescriptor({get: noop, set: noop});
//=> true
isDescriptor({get: noop});
//=> true
isDescriptor({set: noop});
//=> truefalse when the object has invalid properties
isDescriptor({get: noop, set: noop, bar: 'baz'});
//=> false
isDescriptor({get: noop, writable: true});
//=> false
isDescriptor({get: noop, value: true});
//=> falsefalse when an accessor is not a function
isDescriptor({get: noop, set: 'baz'});
//=> false
isDescriptor({get: 'foo', set: noop});
//=> false
isDescriptor({get: 'foo', bar: 'baz'});
//=> false
isDescriptor({get: 'foo', set: 'baz'});
//=> falsefalse when a value is not the correct type
isDescriptor({get: noop, set: noop, enumerable: 'foo'});
//=> false
isDescriptor({set: noop, configurable: 'foo'});
//=> false
isDescriptor({get: noop, configurable: 'foo'});
//=> false- is-accessor-descriptor: Returns true if a value has the characteristics of a valid JavaScript accessor descriptor. | homepage
- is-data-descriptor: Returns true if a value has the characteristics of a valid JavaScript data descriptor. | homepage
- is-descriptor: Returns true if a value has the characteristics of a valid JavaScript descriptor. Works for… more | homepage
- isobject: Returns true if the value is an object and not an array or null. | homepage
Pull requests and stars are always welcome. For bugs and feature requests, please create an issue.
| Commits | Contributor |
|---|---|
| 24 | jonschlinkert |
| 1 | doowb |
| 1 | wtgtybhertgeghgtwtg |
(This project's readme.md is generated by verb, please don't edit the readme directly. Any changes to the readme must be made in the .verb.md readme template.)
To generate the readme, run the following command:
$ npm install -g verbose/verb#dev verb-generate-readme && verbRunning 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:
$ npm install && npm testJon Schlinkert
Copyright © 2017, Jon Schlinkert. Released under the MIT License.
This file was generated by verb-generate-readme, v0.6.0, on July 22, 2017.