Browser Debugging consoleedit

Use browser debugging tools (e.g. F12 or Ctrl+Shift+J in Chrome) to inspect the VEGA_DEBUG variable: * view - access to the Vega View object. See Vega Debugging Guide on how to inspect data and signals at runtime. For VegaLite, VEGA_DEBUG.view.data('source_0') gets the main data set. For Vega, it uses the data name as defined in your Vega spec. * vega_spec - Vega JSON graph specification after some modifications by Kibana. In case of VegaLite, this is the output of the VegaLite compiler. * vegalite_spec - If this is a VegaLite graph, JSON specification of the graph before VegaLite compilation.