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NunoSempere b6addc7f05 feat: add the node modules Necessary in order to clearly see the squiggle hotwiring.		2022-12-03 12:44:49 +00:00
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README.md	feat: add the node modules	2022-12-03 12:44:49 +00:00

README.md

isUndefinedOrNull

Test if a value is undefined or null.

Usage

var isUndefinedOrNull = require( '@stdlib/assert/is-undefined-or-null' );

isUndefinedOrNull( value )

Tests if a value is undefined or null.

var bool = isUndefinedOrNull( undefined );
// returns true

bool = isUndefinedOrNull( null );
// returns true

Examples

var isUndefinedOrNull = require( '@stdlib/assert/is-undefined-or-null' );

var bool;
var x;

bool = isUndefinedOrNull( x );
// returns true

bool = isUndefinedOrNull( undefined );
// returns true

bool = isUndefinedOrNull( void 0 );
// returns true

bool = isUndefinedOrNull( null );
// returns true

bool = isUndefinedOrNull( 'beep' );
// returns false

bool = isUndefinedOrNull( 5 );
// returns false

bool = isUndefinedOrNull( true );
// returns false

bool = isUndefinedOrNull( {} );
// returns false

bool = isUndefinedOrNull( [] );
// returns false

bool = isUndefinedOrNull( function foo() {} );
// returns false