writablePropertiesIn

Return an array of an object's own and inherited writable property names and symbols.

Usage

var writablePropertiesIn = require( '@stdlib/utils/writable-properties-in' );

writablePropertiesIn( obj )

Returns an array of an object's own and inherited writable property names and symbols.

var defineProperty = require( '@stdlib/utils/define-property' );

var obj = {};

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

var props = writablePropertiesIn( obj );
// returns [ 'a', ... ]

Examples

var defineProperty = require( '@stdlib/utils/define-property' );
var hasSymbolSupport = require( '@stdlib/assert/has-symbol-support' );
var Symbol = require( '@stdlib/symbol/ctor' );
var writablePropertiesIn = require( '@stdlib/utils/writable-properties-in' );

var hasSymbols = hasSymbolSupport();

function Foo() {
    this.a = 'a';
    defineProperty( this, 'b', {
        'configurable': true,
        'enumerable': true,
        'writable': false,
        'value': 'b'
    });
    if ( hasSymbols ) {
        this[ Symbol( 'a' ) ] = 'a';
        defineProperty( this, Symbol( 'b' ), {
            'configurable': true,
            'enumerable': true,
            'writable': false,
            'value': 'b'
        });
    }
    return this;
}

Foo.prototype.foo = 'bar';
defineProperty( Foo.prototype, 'beep', {
    'configurable': false,
    'enumerable': false,
    'writable': false,
    'value': 'boop'
});
if ( hasSymbols ) {
    Foo.prototype[ Symbol( 'foo' ) ] = 'bar';
    defineProperty( Foo.prototype, Symbol( 'beep' ), {
        'configurable': false,
        'enumerable': false,
        'writable': false,
        'value': 'boop'
    });
}

var obj = new Foo();
var props = writablePropertiesIn( obj );
// e.g., returns [ 'a', 'foo', ... ]