@stdlib/utils-property-symbols-in NPM

propertySymbolsIn

Return an array of an object's own and inherited symbol properties.

Installation

npm install @stdlib/utils-property-symbols-in

Usage

var propertySymbolsIn = require( '@stdlib/utils-property-symbols-in' );

propertySymbolsIn( obj )

Returns an array of an object's own and inherited symbol properties.

var symbols = propertySymbolsIn( [] );

Notes

In contrast to the built-in Object.getOwnPropertySymbols(), if provided null or undefined, the function returns an empty array, rather than throwing an error.

Examples

var hasSymbolSupport = require( '@stdlib/assert-has-symbol-support' );
var Symbol = require( '@stdlib/symbol-ctor' );
var propertySymbolsIn = require( '@stdlib/utils-property-symbols-in' );

var hasSymbols = hasSymbolSupport();

function Foo() {
    if ( hasSymbols ) {
        this[ Symbol( 'beep' ) ] = 'boop';
    }
    return this;
}

if ( hasSymbols ) {
    Foo.prototype[ Symbol( 'foo' ) ] = 'bar';
}

var obj = new Foo();
var symbols = propertySymbolsIn( obj );

console.log( symbols );

Notice

This package is part of stdlib, a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.