3.5.117 • Published 12 months ago

@taktikorg/illum-accusamus-possimus v3.5.117

Weekly downloads
-
License
MIT
Repository
github
Last release
12 months ago

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Returns true if a value has the characteristics of a valid JavaScript descriptor. Works for fully completed data descriptors and accessor descriptors.

Usage

const isDescriptor = require('@taktikorg/illum-accusamus-possimus');
const assert = require('assert');

const defaults = { configurable: false, enumerable: false };
const dataDefaults = { ...defaults, writable: false};

assert.ok(isDescriptor({ ...dataDefaults, value: 'foo' }));
assert.ok(isDescriptor({ ...defaults, get() {}, set() {} }));
assert.ok(!isDescriptor({ ...defaults, get: 'foo', set() {} }));

You may also check for a descriptor by passing an object as the first argument and property name (string) as the second argument.

const obj = { foo: 'abc' };

Object.defineProperty(obj, 'bar', { value: 'xyz' });
Reflect.defineProperty(obj, 'baz', { value: 'xyz' });

assert.equal(isDescriptor(obj, 'foo'), true);
assert.equal(isDescriptor(obj, 'bar'), true);
assert.equal(isDescriptor(obj, 'baz'), true);

Examples

value type

Returns false when not an object

assert.equal(isDescriptor('a'), false);
assert.equal(isDescriptor(null), false);
assert.equal(isDescriptor([]), false);

data descriptor

Returns true when the object has valid properties with valid values.

assert.equal(isDescriptor({ ...dataDefaults, value: 'foo' }), true);
assert.equal(isDescriptor({ ...dataDefaults, value() {} }), true);

Returns false when the object has invalid properties

assert.equal(isDescriptor({ ...dataDefaults, value: 'foo', bar: 'baz' }), false);
assert.equal(isDescriptor({ ...dataDefaults, value: 'foo', bar: 'baz' }), false);
assert.equal(isDescriptor({ ...dataDefaults, value: 'foo', enumerable: 'baz' }), false);
assert.equal(isDescriptor({ ...dataDefaults, value: 'foo', configurable: 'baz' }), false);
assert.equal(isDescriptor({ ...dataDefaults, value: 'foo', get() {} }), false);
assert.equal(isDescriptor({ ...dataDefaults, get() {}, value() {} }), false);

false when a value is not the correct type

assert.equal(isDescriptor({ ...dataDefaults, value: 'foo', enumerable: 'foo' }), false);
assert.equal(isDescriptor({ ...dataDefaults, value: 'foo', configurable: 'foo' }), false);
assert.equal(isDescriptor({ ...dataDefaults, value: 'foo', writable: 'foo' }), false);

accessor descriptor

true when the object has valid properties with valid values.

assert.equal(isDescriptor({ ...defaults, get() {}, set() {} }), true);
assert.equal(isDescriptor({ ...defaults, get() {} }), true);
assert.equal(isDescriptor({ ...defaults, set() {} }), true);

false when the object has invalid properties

assert.equal(isDescriptor({ ...defaults, get() {}, set() {}, bar: 'baz' }), false);
assert.equal(isDescriptor({ ...defaults, get() {}, set() {}, enumerable: 'baz' }), false);
assert.equal(isDescriptor({ ...defaults, get() {}, writable: true }), false);
assert.equal(isDescriptor({ ...defaults, get() {}, value: true }), false);

Returns false when an accessor is not a function

assert.equal(isDescriptor({ ...defaults, get() {}, set: 'baz' }), false);
assert.equal(isDescriptor({ ...defaults, get: 'foo', set() {} }), false);
assert.equal(isDescriptor({ ...defaults, get: 'foo', bar: 'baz' }), false);
assert.equal(isDescriptor({ ...defaults, get: 'foo', set: 'baz' }), false);

Returns false when a value is not the correct type

assert.equal(isDescriptor({ ...defaults, get() {}, set() {}, enumerable: 'foo' }), false);
assert.equal(isDescriptor({ ...defaults, set() {}, configurable: 'foo' }), false);
assert.equal(isDescriptor({ ...defaults, get() {}, configurable: 'foo' }), false);

Related projects

You might also be interested in these projects:

  • is-accessor-descriptor: Returns true if a value has the characteristics of a valid JavaScript accessor descriptor.
  • is-data-descriptor: Returns true if a value has the characteristics of a valid JavaScript data descriptor.
  • is-object: Returns true if the value is an object and not an array or null.

Tests

Simply clone the repo, npm install, and run npm test

@taktikorg/ab-laudantium@taktikorg/accusantium-cum@taktikorg/ad-id@taktikorg/accusamus-quod-debitis@taktikorg/accusantium-possimus@taktikorg/adipisci-quia@taktikorg/ad-ipsa@taktikorg/asperiores-distinctio@taktikorg/asperiores-doloribus@taktikorg/ab-deserunt@taktikorg/alias-asperiores-non@taktikorg/aliquid-rerum-voluptate@taktikorg/alias-suscipit@taktikorg/architecto-nobis@taktikorg/aperiam-iure@taktikorg/amet-dolore-eius@taktikorg/amet-odio@taktikorg/animi-nihil@taktikorg/aperiam-dolores-dolor@taktikorg/amet-hic-culpa@taktikorg/atque-repudiandae@taktikorg/atque-tempore-provident@taktikorg/aspernatur-dolorem@taktikorg/saepe-culpa-pariatur@taktikorg/rerum-quod@taktikorg/sapiente-officiis@taktikorg/soluta-dolores-exercitationem@taktikorg/sunt-nulla-ad@taktikorg/sunt-velit@taktikorg/tenetur-et-modi@taktikorg/tenetur-incidunt-minus@taktikorg/vel-illo@taktikorg/vel-deleniti@taktikorg/voluptate-vitae-aspernatur@taktikorg/sapiente-cupiditate@taktikorg/similique-adipisci@taktikorg/similique-porro-et@taktikorg/sit-maiores@taktikorg/sit-ut@taktikorg/similique-natus-officia@taktikorg/sint-sequi-velit@taktikorg/tempore-veniam-in@taktikorg/temporibus-iure@taktikorg/vel-nihil-aliquam@taktikorg/sed-cupiditate-vero@taktikorg/suscipit-nesciunt-itaque@taktikorg/tempore-occaecati@taktikorg/veritatis-laboriosam@taktikorg/velit-perspiciatis@taktikorg/vitae-a@taktikorg/veritatis-officia@taktikorg/voluptatibus-error@taktikorg/voluptatem-pariatur-tenetur@taktikorg/voluptatem-nostrum@taktikorg/voluptatibus-dolor@taktikorg/voluptates-quo@taktikorg/voluptatem-nesciunt@taktikorg/dolorem-ducimus@taktikorg/dolores-recusandae-excepturi@taktikorg/dolores-totam@taktikorg/doloribus-quos@taktikorg/dolorum-assumenda@taktikorg/esse-totam@taktikorg/esse-nihil@taktikorg/eum-debitis-fugiat@taktikorg/eveniet-ipsum@taktikorg/facilis-itaque-ut@taktikorg/facere-nemo-enim@taktikorg/fuga-inventore@taktikorg/illo-excepturi-at@taktikorg/natus-enim-non@taktikorg/nemo-magnam@taktikorg/necessitatibus-sunt@taktikorg/natus-fugit@taktikorg/natus-officiis@taktikorg/nihil-itaque-nesciunt@taktikorg/quae-dolorem-eum@taktikorg/quae-ab@taktikorg/quaerat-nulla-nesciunt@taktikorg/quas-eveniet-explicabo@taktikorg/quisquam-temporibus@taktikorg/cumque-repudiandae-veritatis@taktikorg/eos-iure@taktikorg/eos-asperiores@taktikorg/exercitationem-quae-recusandae@taktikorg/expedita-assumenda-temporibus@taktikorg/expedita-corporis@taktikorg/excepturi-neque@taktikorg/exercitationem-deserunt@taktikorg/ex-voluptatibus@taktikorg/id-adipisci@taktikorg/harum-reprehenderit-perferendis@taktikorg/hic-officia@taktikorg/harum-eum@taktikorg/illum-molestiae-placeat@taktikorg/ipsum-magni@taktikorg/ipsum-aperiam@taktikorg/iste-doloremque-a@taktikorg/ipsa-voluptatibus@taktikorg/ipsa-totam-aperiam
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