How to use JSON.parse reviver parameter to parse date string

Question

My JSON string contains a date field that returns such a value:

\"2009-04-04T22:55:16.0000000-04:00\"

I am particularly interested in parsi

Answer 1

1. The regular expression expects a "Zulu" timezone (A 'Z' character at the end), while the sample date-time string shows a numeric timezone ('-04:00'). The following regex will accept both:

   /^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)(Z|([+\-])(\d{2}):(\d{2}))$/
   

   If the time zone digits are not zero, you might want to actually modify the date after parsing and/or converting to UTC, to respect the timezone.

2. I can see dateReviver() being hit. Try the following in a browser:

   I am getting the following in the browser, indicating successful parsing:

   Sat Apr 4 15:55:16 PDT 2009