To convert a date object to string with format hh:mm: ss, use the toISOString() method. It converts using ISO standard i.e. −
YYYY-MM-DDTHH:mm:ss.sssZ
Example
You can try to run the following code to convert a date object to a string −
<html> <head> <title>JavaScript Dates</title> </head> <body> <script> var date, res; date = new Date(); res = date.toISOString(); document.write(res); </script> </body> </html>
Output
2018-05-25T09:55:53.518