README.md

About stdlib...

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writablePropertySymbols

Return an array of an object's own writable symbol properties.

Usage

import writablePropertySymbols from 'https://cdn.jsdelivr.net/gh/stdlib-js/utils-writable-property-symbols@deno/mod.js';

writablePropertySymbols( obj )

Returns an array of an object's own writable symbol properties.

import hasSymbolSupport from 'https://cdn.jsdelivr.net/gh/stdlib-js/assert-has-symbol-support@deno/mod.js';
import Symbol from 'https://cdn.jsdelivr.net/gh/stdlib-js/symbol-ctor@deno/mod.js';
import defineProperty from 'https://cdn.jsdelivr.net/gh/stdlib-js/utils-define-property@deno/mod.js';

var obj = {};

if ( hasSymbolSupport() ) {
    defineProperty( obj, Symbol( 'a' ), {
        'configurable': false,
        'enumerable': false,
        'writable': true,
        'value': 'b'
    });
}

var symbols = writablePropertySymbols( obj );

Notes

• Property order is not guaranteed, as object property enumeration is not specified according to the ECMAScript specification. In practice, however, most engines use insertion order to sort an object's properties, thus allowing for deterministic extraction.

Examples

import hasSymbolSupport from 'https://cdn.jsdelivr.net/gh/stdlib-js/assert-has-symbol-support@deno/mod.js';
import Symbol from 'https://cdn.jsdelivr.net/gh/stdlib-js/symbol-ctor@deno/mod.js';
import writablePropertySymbols from 'https://cdn.jsdelivr.net/gh/stdlib-js/utils-writable-property-symbols@deno/mod.js';

var hasSymbols = hasSymbolSupport();

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

if ( hasSymbols ) {
    Foo.prototype[ Symbol( 'bip' ) ] = 'bop';
}

var obj = new Foo();
var symbols = writablePropertySymbols( obj );
// e.g., returns [ Symbol( 'baz' ) ]

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See Also

• @stdlib/utils-inherited-writable-property-symbols: return an array of an object's inherited writable symbol properties.
• @stdlib/utils-writable-properties: return an array of an object's own writable property names and symbols.
• @stdlib/utils-writable-property-names: return an array of an object's own writable property names.
• @stdlib/utils-writable-property-symbols-in: return an array of an object's own and inherited writable symbol properties.
• @stdlib/utils-property-symbols: return an array of an object's own symbol properties.

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Notice

This package is part of stdlib, a standard library 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.

Community

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License

See LICENSE.

Copyright

Copyright © 2016-2024. The Stdlib Authors.