To add seconds to a JavaScript Date object, use the setSeconds() method. Under that, get the current seconds and add 10 seconds to it. JavaScript date setSeconds() method sets the seconds for a specified date according to local time.
You can try to run the following code to add 10 seconds to date.
Example
<html> <head> <title>JavaScript setSeconds Method</title> </head> <body> <script> var dt = new Date("December 30, 2017 11:20:25"); dt.setSeconds( dt.getSeconds() + 10 ); document.write( dt ); </script> </body> </html>
Output
Sat Dec 30 2017 11:20:35 GMT+0530 (India Standard Time)