It doesn't matter if you are using a static JSON configuration, variables, angular, or a framework to build your chart configurations dynamically. To find the end result JSON, right-click on the chart to trigger the context-menu. From there click on the View Source link. You should see some JSON code and two tabs. Copy/paste the parsed JSON tab contents to get the fully generated chart JSON.
If you have turned off the view source in the context-menu, simply run the following code in your browser console.