A responsive chart demo in Vega. The spec is a modification of a Vega-Lite output:

- Set width and height to be signals. The signals gets their initial values from `containerSize()`, and listens to subsequent resize events on `window:resize`.
- Use `autosize: { type: "fit", contains: "padding" }`. This ensures that the width / height correspond to the entire chart, not the plotting area.

Click `Open` and resize the window to see this example in action.