isBoxedPrimitive

Test if a value is a JavaScript boxed primitive.

Usage

var isBoxedPrimitive = require( '@stdlib/assert/is-boxed-primitive' );

isBoxedPrimitive( value )

Tests if a value is a JavaScript boxed primitive.

var Boolean = require( '@stdlib/boolean/ctor' ); var bool = isBoxedPrimitive( new Boolean( false ) ); // returns true bool = isBoxedPrimitive( true ); // returns false

Notes

  • Boxed primitive objects can be created with one of the following:

    • new Boolean()
    • new Number()
    • new String()
    • Object( Symbol() ) (ES6/ES2015)

Examples

var Boolean = require( '@stdlib/boolean/ctor' ); var Number = require( '@stdlib/number/ctor' ); var isBoxedPrimitive = require( '@stdlib/assert/is-boxed-primitive' ); var bool = isBoxedPrimitive( new Boolean( false ) ); // returns true bool = isBoxedPrimitive( new String( 'beep' ) ); // returns true bool = isBoxedPrimitive( new Number( 3.14 ) ); // returns true bool = isBoxedPrimitive( false ); // returns false bool = isBoxedPrimitive( 0 ); // returns false bool = isBoxedPrimitive( '' ); // returns false bool = isBoxedPrimitive( null ); // returns false bool = isBoxedPrimitive( void 0 ); // returns false bool = isBoxedPrimitive( [] ); // returns false bool = isBoxedPrimitive( {} ); // returns false

See Also