it doesn't work when header is wider than the window.

[AvenKo]

I have tested in your demo and I found that if i add more th to the thead, the th will be hidden if it overflows the window, and the width of th and td in tbody is not same. Just like the picture shows.

[pbpraveen1988]

@AvenKo Same i also found that , i think we need to add some css regarding this