time to milliseconds js code example

Example 1: what 1hr in milliseconds in javascript

/*
** Time in milliseconds

1 second = 1000 milliseconds
15 minutes = 900000 milliseconds
30 seconds = 30000 milliseconds	
1 minute = 60000 milliseconds
5 minutes = 300000 milliseconds
30 minutes = 1800000 milliseconds
45 minutes = 2700000 milliseconds
1 hour = 3600000 milliseconds

*/

Example 2: hrtime to milliseconds

var hrTime = process.hrtime()
console.log(hrTime[0] * 1000000 + hrTime[1] / 1000)