Javascript equivalent of Rails try method

Question

In Rails I can do this:

 x = user.try(:name)

this method returns nil if user is nil else user.name

Answer 1

You can use logical AND (&&) operator. It works differently than in most of the languages because its result is not a boolean. For example:

const x = user && user.name;

The table below shows all possible outcomes of using this operator:

+--------------+-----------------------+
|    user      | x = user && user.name |
+--------------+-----------------------+
| undefined    | undefined             |
| null         | null                  |
| {}           | undefined             |
| {name:''}    | ''                    |
| {name:'Jon'} | 'Jon'                 |
+--------------+-----------------------+