Add method to quickly open chart in the editor from Observable

[domoritz]

I would like to debug a chart and have a hard time loading the chart in the editor. Right now, I am adding JSON.stringify(chart.toJSON() and then copy-paste. It would be nice to use Vega-Embed in https://observablehq.com/@vega/vega-lite-api so that I can quickly add the action button with a button to open the chart in the editor.

[RobinL]

Agreed, this would be useful.

For anyone else seeing this, for the moment you can do this:

embed(vl_api_chart.toSpec())

where

embed = require("vega-embed@6")

(toJSON is deprecated I believe)