Return an array of an object's own and inherited writable symbol properties.
var writablePropertySymbolsIn = require( '@stdlib/utils/writable-property-symbols-in' );
Returns an array
of an object's own and inherited writable symbol properties.
var hasSymbolSupport = require( '@stdlib/assert/has-symbol-support' );
var Symbol = require( '@stdlib/symbol/ctor' );
var defineProperty = require( '@stdlib/utils/define-property' );
var obj = {};
if ( hasSymbolSupport() ) {
defineProperty( obj, Symbol( 'a' ), {
'configurable': false,
'enumerable': false,
'writable': true,
'value': 'b'
});
}
var symbols = writablePropertySymbolsIn( obj );
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.var defineProperty = require( '@stdlib/utils/define-property' );
var hasSymbolSupport = require( '@stdlib/assert/has-symbol-support' );
var Symbol = require( '@stdlib/symbol/ctor' );
var writablePropertySymbolsIn = require( '@stdlib/utils/writable-property-symbols-in' );
var hasSymbols = hasSymbolSupport();
var symbols;
var obj;
function Foo() {
if ( hasSymbols ) {
defineProperty( this, Symbol( 'baz' ), {
'configurable': false,
'enumerable': false,
'writable': true,
'value': 'qux'
});
}
return this;
}
if ( hasSymbols ) {
defineProperty( Foo.prototype, Symbol( 'bip' ), {
'configurable': false,
'enumerable': false,
'writable': true,
'value': 'bop'
});
}
obj = new Foo();
symbols = writablePropertySymbolsIn( obj );
console.log( symbols );