isNonEnumerableProperty

Test if an object's own property is non-enumerable.

Usage

var isNonEnumerableProperty = require( '@stdlib/assert/is-nonenumerable-property' );

isNonEnumerableProperty( value, property )

Returns a boolean indicating if a value has a non-enumerable property.

var defineProperty = require( '@stdlib/utils/define-property' ); var obj = { 'foo': 'bar' }; defineProperty( obj, 'beep', { 'configurable': false, 'enumerable': false, 'writable': true, 'value': 'boop' }); var bool = isNonEnumerableProperty( obj, 'beep' ); // returns true bool = isNonEnumerableProperty( obj, 'foo' ); // returns false

Notes

Value arguments other than null or undefined are coerced to objects.

var bool = isNonEnumerableProperty( 'beep', 'length' ); // returns true

Examples

var isNonEnumerableProperty = require( '@stdlib/assert/is-nonenumerable-property' ); var bool = isNonEnumerableProperty( [ 'a' ], 'length' ); // returns true bool = isNonEnumerableProperty( { 'a': 'b' }, 'a' ); // returns false bool = isNonEnumerableProperty( [ 'a' ], 0 ); // returns false bool = isNonEnumerableProperty( {}, 'toString' ); // returns false bool = isNonEnumerableProperty( {}, 'hasOwnProperty' ); // returns false bool = isNonEnumerableProperty( null, 'a' ); // returns false bool = isNonEnumerableProperty( void 0, 'a' ); // returns false bool = isNonEnumerableProperty( { 'null': false }, null ); // returns false bool = isNonEnumerableProperty( { '[object Object]': false }, {} ); // returns false