Legend scroll not showing on layout.legend.orientation = 'h'

[psalmody]

When using layout.legend.orientation.h and have more than a few legend items, they don't appear to scroll.

JSON code generated by ggplotly() from R but simplified. See jsfiddle

[n-riesco]

At the time, I implemented horizontal legends, there were no plans for horizontal scroll bars.

As a workaround, the traces could be grouped. See the following example:

https://github.com/plotly/plotly.js/blob/master/test/image/mocks/legend_horizontal_groups.json

[etpinard]

@psalmody as @n-riesco pointed, this is the intended behavior you can look at PR #535 starting from #535 (comment) for the rationale.

Bookkeeping duties imply closing this issue. But thanks for your interest for plotly.js 🍻