Creating a Custom Decorator

Using toString() method on an object

Suppose we have a Person class that has a few fields. Let’s create an instance, called peter, for the class and invoke the toString() method on it, like so:

console.log(peter.toString());

Problem

The output of this call will be

[object Object]

This is disappointing if we were hoping to get a glimpse of the fields and their values. If we printed the instance without .toString(), we would have seen all the fields, but maybe that’s too much.

Solution

It would be great to dictate what toString() should return, without having to write it for each class we create. What if we could decorate classes with a ToString() decorator? Seems ...