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    Object.getOwnPropertySymbols()

    This is a new technology, part of the ECMAScript 2015 (ES6) standard .
    This technology's specification has been finalized, but check the compatibility table for usage and implementation status in various browsers.

    Summary

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

    Syntax

    Object.getOwnPropertySymbols(obj)

    Parameters

    obj
    The object whose symbol properties are to be returned.

    Description

    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.

    Examples

    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)
    

    Specifications

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

    Browser compatibility

    Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
    Basic support (Yes) 36.0 (36.0) Not supported (Yes) Not supported
    Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
    Basic support (Yes) (Yes) 36.0 (36.0) Not supported Not supported Not supported

    See also

    Document Tags and Contributors

    Contributors to this page: fscholz, Mingun, realityking
    Last updated by: fscholz,