onRelayout Parameter

[timothy-godfrey]

Possibly a bug, I get differently structured but deceptively similar parameters from the onRelayout event.

In the instance that onRelayout is triggered by a change to a rangeslider the event parameter is an object with 1 array called "xaxis.range":
eventParameter : { xaxis.range : [xmin, xmax] }

In the instance that onRelayout is triggered by a scroll zoom action the event parameter is an object with 2 properties that are named in way that makes them appear like an array, but are not:
eventParameter : { xaxis.range[0] : xmin, xaxis.range[1] : xmax}

I'm not sure if this is by design or by accident, but it broke my code because I was doing a check like so:
if( typeof eventParameter["xaxis.range"] === 'undefined') { /code/ }

In case it is relevant, part of the reason that I am only getting x axis values is because I have the y axes property 'fixedrange' set to true, and 'scrollZoom' set to true.

[etpinard]

Duplicate of plotly/plotly.js#1877