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Return an array of an object's inherited non-enumerable symbol properties.
To use in Observable,
inheritedNonEnumerablePropertySymbols = require( 'https://cdn.jsdelivr.net/gh/stdlib-js/utils-inherited-nonenumerable-property-symbols@umd/browser.js' )To vendor stdlib functionality and avoid installing dependency trees for Node.js, you can use the UMD server build:
var inheritedNonEnumerablePropertySymbols = require( 'path/to/vendor/umd/utils-inherited-nonenumerable-property-symbols/index.js' )To include the bundle in a webpage,
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/utils-inherited-nonenumerable-property-symbols@umd/browser.js"></script>If no recognized module system is present, access bundle contents via the global scope:
<script type="text/javascript">
(function () {
window.inheritedNonEnumerablePropertySymbols;
})();
</script>Returns an array of an object's inherited non-enumerable symbol properties.
var defineProperty = require( '@stdlib/utils-define-property' );
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 ) {
defineProperty( this, Symbol( 'a' ), {
'configurable': false,
'enumerable': false,
'writable': false,
'value': 'a'
});
}
return this;
}
if ( hasSymbols ) {
defineProperty( Foo.prototype, Symbol( 'b' ), {
'configurable': false,
'enumerable': false,
'writable': false,
'value': 'b'
});
}
f = new Foo();
symbols = inheritedNonEnumerablePropertySymbols( f );By default, the function walks an object's entire prototype chain. To limit the inheritance level, provide a level argument.
var symbols = inheritedNonEnumerablePropertySymbols( [], 1 );- Property order is not guaranteed, as
objectproperty enumeration is not specified according to the ECMAScript specification. In practice, however, most engines use insertion order to sort anobject's properties, thus allowing for deterministic extraction.
<!DOCTYPE html>
<html lang="en">
<body>
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/utils-define-property@umd/browser.js"></script>
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/assert-has-symbol-support@umd/browser.js"></script>
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/symbol-ctor@umd/browser.js"></script>
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/utils-inherited-nonenumerable-property-symbols@umd/browser.js"></script>
<script type="text/javascript">
(function () {
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 = inheritedNonEnumerablePropertySymbols( obj );
console.log( symbols );
})();
</script>
</body>
</html>@stdlib/utils-inherited-nonenumerable-properties: return an array of an object's inherited non-enumerable property names and symbols.@stdlib/utils-inherited-nonenumerable-property-names: return an array of an object's inherited non-enumerable property names.@stdlib/utils-nonenumerable-properties: return an array of an object's own non-enumerable property names and symbols.@stdlib/utils-nonenumerable-property-names: return an array of an object's own non-enumerable property names.@stdlib/utils-nonenumerable-property-symbols: return an array of an object's own non-enumerable symbol properties.@stdlib/utils-nonenumerable-property-symbols-in: return an array of an object's own and inherited non-enumerable symbol properties.@stdlib/utils-property-symbols: return an array of an object's own symbol properties.
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.
See LICENSE.
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