Pass a custom document object to the options of handle

[thjungers]

Passing a custom document object can be useful. My use case is shadow DOMs: the contents of the shadow DOMs are not available to document.querySelectorAll, but are available to shadowRoot.querySelectorAll.

Although not documented, this plugin accepts a document option in init, which defaults to document (i.e. window.document). This was added by commit 6d6569d.
However, this change does not support passing a custom document to the handle function. This would allow using a different document object within the same project.

I am preparing a pull request to solve this.

[mthh]

That's a good idea, thanks.

I will also add some documentation for the document option that can be given to the init function, thanks for the reminder.