GWT interoperability / usage of typeof instead instanceof

[daRoof]

When using the timeline from GWT, type determination for provided functions via the instanceof operator does not work.
Changed setOptions method to use typeof instead instanceof.

[yotamberk]

Thank @daRoof !
This is not the only use-case of using instanceof.
Is there any reason for changing only this function to use typeof instead of instanceof?

In any case:

I've now branched out to a new fork of my own including only Timeline.
I've applied your change here: https://github.com/yotamberk/timeline-plus
and can be used via npm here: https://www.npmjs.com/package/timeline-plus
Awesome fix! Thanks for your contribution! Future PRs will be reviewed and added in the new fork

[daRoof]

I am writing a GWT wrapper for the timeline component. Until now, there has only been this one occurance of instanceof that I had problems with.

As far as I understand, the problem with instanceof is caused by complex objects (a function in this case) passed from GWT code to the timeline. I think this happens only when setting options on the timeline.
But I have not included all features of the timeline, yet. So there may be further pull requests from me.

[mojoaxel]

LGTM