This stub is used for experimenting the possibility of vega chart view to return svg synchronously.

Goal

To check for the possibility of synchronous chart rendering in vega 5

Problem

We want the chart to be returned instantly rather than resolving promise in order to append it to html with help of parchment. But currently vega provides promises as a way of rendering in server side.

Run

npm install
npm test

Usage

• try using wait.for package. It helps in converting callbacks to synchronous and hence Promise from view.toSVG() to be converted to callback before using wait.for.
• make use of util.callbackify to convert promise or asyn functions to callbacks