UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Safari/537.36

Steps to reproduce the problem:
1. Add event listener for keyup:

window.addEventListener("keyup", handleKeyUp)

function handleKeyUp(e)
{
   console.log(e.ctrlKey) == > coming false;
   console.log(e.keyCode) == > coming 17, which is ctrlKey.
}

2. Press Ctrl Key
3. e.CtrlKey is coming false, but keycode is coming right.

What is the expected behavior?
e.CtrlKey must be true.

What went wrong?
e.CtrlKey is coming false.

Did this work before? No 

Chrome version: 59.0.3071.115  Channel: stable
OS Version: 10.0
Flash Version: