how to subtract years from a date in js code example

Example 1: javascript subtract days from date

var myCurrentDate=new Date();
var myPastDate=new Date(myCurrentDate);
    myPastDate.setDate(myPastDate.getDate() - 8);//myPastDate is now 8 days in the past

Example 2: javascript subtract years from date

var date = new Date(); 
date.setDate(date.getDate() + days);
date.setMonth(date.getMonth() + months);
date.setFullYear(date.getFullYear() + years);
console.log((date.getMonth() ) + '/' + (date.getDate()) + '/' + (date.getFullYear()));