How do I check if a browser supports the creation of a ClipBoardItem?

Question

I want to determine if a browser is able to create a new ClipBoardItem in Javascript.
The following if condition is sometimes true and sometimes false in Google Chrome so it doesn't work in my case:

if(typeof ClipBoardItem !== "undefined") {
    // new ClipBoardItem()
}

Answer 1

Is it ClipboardItem instead of ClipBoardItem, because typeof ClipboardItem is giving me correct results.