'plotly_selected' fires undefined when plot is clicked subsequent to previous 'plotly_selected'

[cpsievert]

Not sure if this is intentional, but I find it surprising, especially considering 'plotly_deselect' could be used to 'clear' a selection

https://codepen.io/cpsievert/pen/BGZQRx

[etpinard]

Yep, it's intended (for now):

plotly.js/src/plots/cartesian/select.js

Lines 258 to 262 in 3a32ac0

	// TODO: remove in v2 - this was probably never intended to work as it does,
	// but in case anyone depends on it we don't want to break it now.
	// Note that click-to-select introduced pre v2 also emitts proper
	// event data when clickmode is having 'select' in its flag list.
	gd.emit('plotly_selected', undefined);

Ok, if I move this to the v2 checklist in #420 ?

[cpsievert]

Sounds good to me, thanks!

[etpinard]

Moved to #420 (comment)