@stdlib/assert-is-type-error NPM

isTypeError

Test if a value is a TypeError object.

Installation

npm install @stdlib/assert-is-type-error

Usage

var isTypeError = require( '@stdlib/assert-is-type-error' );

isTypeError( value )

Tests if a value is a TypeError object.

var bool = isTypeError( new TypeError( 'beep' ) );
// returns true

Notes

This function should not be considered robust. While the function should always return true if provided a TypeError (or a descendant) object, false positives may occur due to the fact that the TypeError constructor inherits from Error and has no internal class of its own. Hence, TypeError impersonation is possible.

Examples

var isTypeError = require( '@stdlib/assert-is-type-error' );

var bool = isTypeError( new TypeError( 'type error' ) );
// returns true

bool = isTypeError( new Error( 'error' ) );
// returns false

bool = isTypeError( new EvalError( 'eval error' ) );
// returns false

bool = isTypeError( new ReferenceError( 'reference error' ) );
// returns false

bool = isTypeError( new SyntaxError( 'syntax error' ) );
// returns false

bool = isTypeError( new RangeError( 'range error' ) );
// returns false

bool = isTypeError( new URIError( 'URI error' ) );
// returns false

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

bool = isTypeError( null );
// returns false

Notice

This package is part of stdlib, a standard library for JavaScript and Node.js, 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.