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Return an array of an object's own enumerable and non-enumerable property names.
import propertyNames from 'https://cdn.jsdelivr.net/gh/stdlib-js/utils-property-names@esm/index.mjs';Returns an array of an object's own enumerable and non-enumerable property names.
var obj = {
'a': 1,
'b': 2
};
var keys = propertyNames( obj );
// e.g., returns [ 'a', 'b' ]- Name order is not guaranteed, as
objectkey enumeration is not specified according to the ECMAScript specification. In practice, however, most engines use insertion order to sort anobject's keys, thus allowing for deterministic extraction. - In contrast to the built-in
Object.getOwnPropertyNames(), if providednullorundefined, the function returns an emptyarray, rather than throwing an error.
<!DOCTYPE html>
<html lang="en">
<body>
<script type="module">
import defineProperty from 'https://cdn.jsdelivr.net/gh/stdlib-js/utils-define-property@esm/index.mjs';
import propertyNames from 'https://cdn.jsdelivr.net/gh/stdlib-js/utils-property-names@esm/index.mjs';
function Foo() {
this.beep = 'boop';
this.a = {
'b': 'c'
};
defineProperty( this, 'baz', {
'value': 'qux',
'configurable': true,
'writable': true,
'enumerable': false
});
return this;
}
Foo.prototype.foo = [ 'bar' ];
var obj = new Foo();
var keys = propertyNames( obj );
console.log( keys );
// e.g., => [ 'beep', 'a', 'baz' ]
</script>
</body>
</html>@stdlib/utils-keys: return an array of an object's own enumerable property names.@stdlib/utils-nonenumerable-property-names: return an array of an object's own non-enumerable property names.@stdlib/utils-property-names-in: return an array of an object's own and inherited enumerable and non-enumerable property names.@stdlib/utils-property-symbols: return an array of an object's own symbol properties.
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.
See LICENSE.
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