Create new Class
class TypedError extends Error { constructor(message,_type,_severity = 0) { super(message); this.type = _type; this.severity = _severity; } }; unlike the standard Error that you can throw like so
throw Error("Wunderbar") the extended class should be called with ** new ** keyword
throw new TypedError(error.message,"CustomerOnboardFailed",2) and if you want to rethrow the CustomError in the trycatch block you should pass the customError object in the rethrow statement
function gonnaThrow(){ throw new TypedError("CustomError message","InsufficientBalance",9); }; function gonnaRethrow(){ try { gonnaThrow(); } catch (error) { throw error; }; }; function main(){ try { gonnaRethrow(); } catch (error) { const {name,message,stack,type,severity} = error; console.log({name,message,stack,type,severity}); }; }; 
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