Use this function in the UI part of your Shiny app.

vegawidgetOutput(outputId, width = "auto", height = "auto")



output variable to read from

width, height

Must be a valid CSS unit (like "100%", "400px", "auto") or a number, which will be coerced to a string and have "px" appended. For vegawidgets, "auto" is useful because, as of now, the spec determines the size of the widget, then the widget determines the size of the container.