Unclear Intended behavior for marker.size=0 for scatter and scattergl

[justinjhendrick]

Setting the marker size to zero could have two reasonable interpretations:

1. 0 is a valid input and the markers don't get plotted
2. 0 is not a valid input and the markers get plotted in the default size

It seems Option 2 is the current implementation as of v2.28.0 (codepen link). But is that intentional? The documentation says

size Parent: data[type=scattergl].marker Type: number or array of numbers greater than or equal to 0 Default: 6 Sets the marker size(in px).

The documentation sounds a bit more like option 1, to me, because 0 is inside the valid range. Also, an array of all 0s does not get plotted, which I assumed should be the same behavior of a single 0.

Should the documentation be clarified or the implementation be changed?