# isSyntaxError > Test if a value is a [SyntaxError][mdn-syntax-error] object.
## Usage ```javascript var isSyntaxError = require( '@stdlib/assert/is-syntax-error' ); ``` #### isSyntaxError( value ) Tests if a `value` is a [`SyntaxError`][mdn-syntax-error] object. ```javascript var bool = isSyntaxError( new SyntaxError( 'beep' ) ); // returns true ```
## Notes - This function should **not** be considered robust. While the function should **always** return `true` if provided a [`SyntaxError`][mdn-syntax-error] (or a descendant) object, false positives may occur due to the fact that the [`SyntaxError`][mdn-syntax-error] constructor inherits from [`Error`][mdn-error] and has no internal class of its own. Hence, [`SyntaxError`][mdn-syntax-error] impersonation is possible.
## Examples ```javascript var isSyntaxError = require( '@stdlib/assert/is-syntax-error' ); var bool = isSyntaxError( new SyntaxError( 'syntax error' ) ); // returns true bool = isSyntaxError( new Error( 'error' ) ); // returns false bool = isSyntaxError( new EvalError( 'eval error' ) ); // returns false bool = isSyntaxError( new ReferenceError( 'reference error' ) ); // returns false bool = isSyntaxError( new RangeError( 'range error' ) ); // returns false bool = isSyntaxError( new TypeError( 'type error' ) ); // returns false bool = isSyntaxError( new URIError( 'URI error' ) ); // returns false bool = isSyntaxError( {} ); // returns false bool = isSyntaxError( null ); // returns false ```