Exposing (and augmenting) Plotly.Axes.list

[bpostlethwaite]

@alexcjohnson it is possible to require Axes.list statically but without tree shaking you end up including a lot of extra plotly.js bytes in the bundle https://github.com/plotly/plotly.js/blob/master/src/plots/cartesian/axis_ids.js#L11-L15

In the Plotly.react model we are asking the user to update gd.data and gd.layout in their application code. As such it might be useful to expose some logic that can wrap intricacies such as

plotly.js/src/plot_api/plot_api.js

Lines 1726 to 1736 in aa67de2

	if(keys[i].indexOf('allaxes') === 0) {
	for(j = 0; j < axes.length; j++) {
	var scene = axes[j]._id.substr(1),
	axisAttr = (scene.indexOf('scene') !== -1) ? (scene + '.') : '',
	newkey = keys[i].replace('allaxes', axisAttr + axes[j]._name);
	if(!aobj[newkey]) aobj[newkey] = aobj[keys[i]];
	}
	delete aobj[keys[i]];
	}

I'll update this issue with suggestions once I implement some more of the Axes update code in the App I am working on.

[alexcjohnson]

The reorganization I'm doing as part of #2125 will simplify Axes.list substantially, so requiring it directly may become viable, but we can discuss that when I get that PR up, might not even be necessary at that point. I'm sure @etpinard would approve if we can avoid exposing innards like that!

[etpinard]

Closing (for now).