Metatext

[etpinard]

resolves #3427

cc @plotly/plotly_js and @nicolaskruchten

[alexcjohnson]

Does it need to be text? Should we just call it layout.meta? I'm imagining in the short term templating numbers (potentially with a format spec), and longer term possibly using this as a way to share other settings across multiple traces, axes, etc.

[etpinard]

Should we just call it layout.meta

I don't have a strong opinion.

[nicolaskruchten]

Looks great to me! meta works for me, although there is no requirement today to support anything beyond text, we may as well leave the door open.

[etpinard]

Looks great to me! meta works for me

done in b03e777

[nicolaskruchten]

💃

[nicolaskruchten]

Ah hang on, do we need to add anything for metasrc ?

[nicolaskruchten]

Just so the plotly.py machinery etc doesn't complain about Chart Studio sliding that in...

[etpinard]

do we need to add anything for metasrc

That's done automatically here:

plotly.js/src/plot_api/plot_schema.js

Lines 617 to 622 in 7d67f80

	if(attr.valType === 'data_array') {
	// all 'data_array' attrs have role 'data'
	attr.role = 'data';
	// all 'data_array' attrs have a corresponding 'src' attr
	attrs[attrName + 'src'] = makeSrcAttr(attrName);
	}

[nicolaskruchten]

ok great :)