Return an array of an object's inherited enumerable symbol properties.
var inheritedEnumerablePropertySymbols = require( '@stdlib/utils/inherited-enumerable-property-symbols' );
Returns an array
of an object's inherited enumerable symbol properties.
var hasSymbolSupport = require( '@stdlib/assert/has-symbol-support' );
var Symbol = require( '@stdlib/symbol/ctor' );
var hasSymbols = hasSymbolSupport();
var symbols;
var f;
function Foo() {
if ( hasSymbols ) {
this[ Symbol( 'a' ) ] = 'a';
}
return this;
}
if ( hasSymbols ) {
Foo.prototype[ Symbol( 'b' ) ] = 'b';
}
f = new Foo();
symbols = inheritedEnumerablePropertySymbols( f );
By default, the function walks an object's entire prototype chain. To limit the inheritance level, provide a level
argument.
var symbols = inheritedEnumerablePropertySymbols( [], 1 );
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 inheritedEnumerablePropertySymbols = require( '@stdlib/utils/inherited-enumerable-property-symbols' );
var hasSymbols = hasSymbolSupport();
var symbols;
var obj;
function Foo() {
this.a = 'a';
defineProperty( this, 'b', {
'configurable': false,
'enumerable': false,
'writable': true,
'value': 'b'
});
if ( hasSymbols ) {
this[ Symbol( 'a' ) ] = 'a';
defineProperty( this, Symbol( 'b' ), {
'configurable': false,
'enumerable': false,
'writable': false,
'value': 'b'
});
}
return this;
}
Foo.prototype.c = 'c';
defineProperty( Foo.prototype, 'd', {
'configurable': false,
'enumerable': false,
'writable': false,
'value': 'd'
});
if ( hasSymbols ) {
Foo.prototype[ Symbol( 'c' ) ] = 'c';
defineProperty( Foo.prototype, Symbol( 'd' ), {
'configurable': false,
'enumerable': false,
'writable': false,
'value': 'd'
});
}
obj = new Foo();
symbols = inheritedEnumerablePropertySymbols( obj );
console.log( symbols );