isInheritedProperty

Test if an object has an inherited property.

Usage

var isInheritedProperty = require( '@stdlib/assert/is-inherited-property' );

isInheritedProperty( value, property )

Returns a boolean indicating if a value has an inherited property.

var obj = {
    'beep': 'boop'
};

var bool = isInheritedProperty( obj, 'beep' );
// returns false

bool = isInheritedProperty( obj, 'hasOwnProperty' );
// returns true

bool = isInheritedProperty( obj, 'bap' );
// returns false

Notes

The function does not throw when provided null or undefined. Instead, the function returns false.

var bool = isInheritedProperty( null, 'a' );
// returns false

bool = isInheritedProperty( void 0, 'a' );
// returns false

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

var bool = isInheritedProperty( 'beep', 'toString' );
// returns true

Non-symbol property arguments are coerced to strings.

function Foo() {
    return this;
}

Foo.prototype.null = true;
Foo.prototype[ '[object Object]' ] = true;

var obj = new Foo();

var bool = isInheritedProperty( obj, null );
// returns true

bool = isInheritedProperty( obj, {} );
// returns true

Examples

var isInheritedProperty = require( '@stdlib/assert/is-inherited-property' );

var bool = isInheritedProperty( {}, 'hasOwnProperty' );
// returns true

bool = isInheritedProperty( { 'a': 'b' }, 'a' );
// returns false

bool = isInheritedProperty( { 'a': 'b' }, 'c' );
// returns false

bool = isInheritedProperty( { 'a': 'b' }, null );
// returns false

bool = isInheritedProperty( null, 'a' );
// returns false

bool = isInheritedProperty( void 0, 'a' );
// returns false

bool = isInheritedProperty( { 'null': false }, null );
// returns false

bool = isInheritedProperty( { '[object Object]': false }, {} );
// returns false