Can't find container.contents with "most common use of pjax" rise reload page any time

[bscheshirwork]

The simplest and most common use of pjax looks like this:

$(document).pjax('a', '#pjax-container')

so... the option.fragment not definite => https://github.com/defunkt/jquery-pjax/blob/153262eda33e31119eabb97cd5f14365580a3b35/jquery.pjax.js#L686-L705

in fullDocument case the obj.contents not set

https://github.com/defunkt/jquery-pjax/blob/153262eda33e31119eabb97cd5f14365580a3b35/jquery.pjax.js#L276-L280