what to use to get the time with javascript code example

Example 1: javascript date get current date

var today = new Date();
var date = today.getFullYear()+'-'+(today.getMonth()+1)+'-'+today.getDate();
//var time = today.getHours() + ":" + today.getMinutes() + ":" + today.getSeconds();
var dateTime = date+' '+time;
The dateTime variable contains result as:

2018-8-3 //11:12:40

Example 2: javascript get Time

var d=new Date();
d.getTime();//I'm in milliseconds, divide by 1000 for seconds