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The Object.getOwnPropertySymbols() method returns an array of all symbol properties found directly upon a given object.




The object whose symbol properties are to be returned.

Return value

An array of all symbol properties found directly upon the given object.


Similar to Object.getOwnPropertyNames(), you can get all symbol properties of a given object as an array of symbols. Note that Object.getOwnPropertyNames() itself does not contain the symbol properties of an object and only the string properties.

As all objects have no own symbol properties initially, Object.getOwnPropertySymbols() returns an empty array unless you have set symbol properties on your object.


var obj = {};
var a = Symbol('a');
var b = Symbol.for('b');

obj[a] = 'localSymbol';
obj[b] = 'globalSymbol';

var objectSymbols = Object.getOwnPropertySymbols(obj);

console.log(objectSymbols.length); // 2
console.log(objectSymbols);        // [Symbol(a), Symbol(b)]
console.log(objectSymbols[0]);     // Symbol(a)


Specification Status Comment
ECMAScript 2015 (6th Edition, ECMA-262)
The definition of 'Object.getOwnPropertySymbols' in that specification.
Standard Initial definition.
ECMAScript Latest Draft (ECMA-262)
The definition of 'Object.getOwnPropertySymbols' in that specification.

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support38 Yes36 No259
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support5.138 Yes36259 Yes

See also

문서 태그 및 공헌자

최종 변경: wbamberg,