throw new Error('Whoops!')

FactoryController.prototype.create = function (callback) { //The throw is working, and the exception is returned. throw new Error('An error occurred'); //outside callback try { this.check(function (check_result) { callback(check_result); }); } catch (ex) { throw new Error(ex.toString()); }
}
FactoryController.prototype.create = function (callback) { try { this.check(function (check_result) { //The throw is not working on this case to return the exception to the caller(parent) throw new Error('An error occurred'); //inside callback }); } catch (ex) { throw new Error(ex.toString()); }
}

try { throw new Error('Whoops!')
} catch (e) { console.error(e.name + ': ' + e.message)
}

throw new Error("Error message here"); // Uncaught Error: Error message here

new Promise((resolve, reject) => { resolve("ok");
}).then((result) => { throw new Error("Whoops!"); // rejects the promise
}).catch(alert); // Error: Whoops!

throw new Error("message");

try { // body of try throw exception;
}
catch(error) { // body of catch
}

throw expression;