event.target.form returns null in Internet Explorer

I am building a complete dynamic rendering web application using ReactJS. In a case, I need to get the form elements on click action.

So, I used event.target.form.elements and it worked well in Chrome and Mozilla. But when I test the Application in IE, returns null. ie event.target.form is null.

From blog suggestions, I used event.currentTarget and event ? event.target : window.event.srcElement but that too didn't work. I wrote a function doing similar as below,

function getTarget(e) {
  var evn = e || window.event;
  return evn.srcElement || e.target;
}

still didn't work.

Is there any work around to get this get passed in IE browser. The version on IE using is IE 11.