ES6 Custom Error with default message

function MyError(message) { 
   this.name = 'CustomError'; 
   this.message = message || 'Error raised with default message'; 
} 
try { 
   throw new MyError(); 
} catch (e) {  
   console.log(e.name);      
   console.log(e.message);  // 'Default Message' 
}