4.13.103 • Published 1 year ago

@patrtorg/libero-reiciendis v4.13.103

Weekly downloads
-
License
MIT
Repository
github
Last release
1 year 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('@patrtorg/libero-reiciendis');
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

accessoridhigher-orderfastcopycoreconcatMaplruCSSStyleDeclarationentriespropRxJS6to5commandertextperformanttoArrayregular expressionconfigformatjschildrssdeepes2016toSortedsomeWebSocketsprotochromecssfast-copyasteriskscloudwatchworkermatcheschaipipeObjectpicomatchiteratortimelookapolloboundurlsyntaxerrorreduxbabelkinesisgetPrototypeOfserializeglobal this valueTypeBoxinrmdireslintpluginbundlingroutingformsvariablesautoprefixerInt16ArrayRegExp#flagsdependenciesArray.prototype.containsisConcatSpreadablefindLasttypesreusevisualFloat32Arrayclassnamesuninstallswfasserta11ytranspilerrapidtermcolumnObservablefilterdom-testing-librarytacitdommatches-shim APIes8fast-deep-copylook-upiteratedeep-clonedeterministicposeinferencemapreduceES2020symlinkspreprocessortapedefineesESnextTypeScriptreact animationcodestyped arraypolyfillguidES3SettelephoneECMAScript 6class-validatorspeces7ES5reducerarraystransportglacierbrowserlistnativelistenersdayjsjasminesetPrototypeOfObject.entriesspeedtraverseutilsredirect0globalThisreadscheme-validationinstrumentationcharacterstapinstallgraphqlMapconsumerm -frPushprefixlocationimmutablestructuredCloneenderflaggenericsexpressfpECMAScript 5dropdeepcopycoloreventEmitterastPromisetoolsstyled-componentsecmascriptjsxbrowserbindframeworkrdsstylingECMAScript 2018dataViewtypeHyBiavacharacterappcacheObject.definePropertycoverageredux-toolkitvalueshellSymbolweakmapcallboundformattingeventDispatcherenvironmentsexecenvironmentvalidationtddfigletdebuggerTypedArraycallbindIteratorschemareact posegetcreatemkdirpestreedependency managerspawncore-jsjshintweaksetfindupvalidateeslintmomentclioutputdironcespinnersloadbalancingprototypeexecfilequerystringutilitiesfind-upprotocol-bufferspackage.jsonwalkhooksobjdebugcallbackpropertyArrayBuffer#slicesetImmediateES2016ECMAScript 2022prunees-abstractcall-boundObject.isidleflatMappackageprivateenumerablemodulestyleguiderestlockfile256package managerreact-hookseverysyntaxunicodeshimcloudtrailerrorvalidconstAsyncIteratorframerexecutebrowserslistajaxatomECMAScript 2015YAMLmergestringlanguageserializationprotobuftostringtagregular-expressionhasOwnPropertyinputgroupargumentbusyutilityasciitranspileArray.prototype.flatawsObject.assignsinatraarrayfile systemdeep-copytesterObject.getPrototypeOfconsoleRxtrimanimationramdadataviewelectroncollection.es6coercibleFloat64Arrayes5restfuljQueryform-validationpushjoiArray.prototype.findLastIndex[[Prototype]]purees-shimsloghardlinksletsortedchinesestyleoffsetkoreanpropertiesworkspace:*ECMAScript 2016multi-packagegetintrinsicarraybufferglobal objectbinbinariessortdescription$.extendutil.inspectjson-schema-validatorArray.prototype.includesextendWeakSetstoragegatewaymonorepowritableUint8Arrayeast-asian-widthloadingflatten
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