converting date from one given format to another

Question

I have date in this format ,

Tue Sep 04 2018 05:30:00 GMT 0530 (India Standard Time).

I need to convert it to this format

2018-12-16T00:00:00.000Z

If i store the first one in a variable and try x.toISOString() , it throws an error.

What should be the correct method to get this done ?

Answer 1

 function myFunction() { var d = new Date(); var n = d.toISOString(); document.getElementById("date").innerHTML = n; } 

 <button onclick="myFunction()"> Date in ISO</button> <div id="date"></div>