JavaScript objects have a default value. In fact, they have two default values depending on the context. You can easily add default values of your choice to a custom ...

The toString() method is generally used to convert values into their string representations. However, when called on a Symbol, it throws a TypeError because Symbols ...

The toString() method of {{jsxref("Object")}} instances returns a string representing this object. This method is meant to be overridden by derived objects for custom type coercion logic. A string ...