I want to check whether moment object is valid or not, so i used both isValid() and _isValid in different places. Both are giving same results. So i want to know purpose of using both.

Note: I know basic diff that one is function and other one is attribute.

I want to check whether moment object is valid or not, so i used both isValid() and _isValid in different places. Both are giving same results. So i want to know purpose of using both.

Note: I know basic diff that one is function and other one is attribute.

• javascript
• html
• momentjs

1 Answer 1

isValid() is documented and so using it in prodution code is fine. It tells you whether the Moment instance contains a valid date/time.

_isValid is not documented and so using it in production code is a bad idea. It doesn't officially tell you anything. Its meaning could change, or it could disappear entirely, from one Moment to the next (see what I did there? ;-) ).

In general, in JavaScript, when you see a property name prefixed with _ it means "this is internal, pretend you don't see it."