How to convert a date string such as September 15, 2015 into an isoDate object and insert it into mondodb?

  node.js, question

How to convert a date string such as September 15, 2015 into an isoDate object and insert it into mondodb?

The moment library can be used for conversion.
In fact, I feel that you can directly save the date as a string in the database without converting it into an isoDate object, and then convert it into a date.