This reintroduces a JSON serialization step that fixes an obscure error. The error happened when the height of a Vega-Lite figure was an object. The error seems to happen because the height object had a null prototype, which seems to happen when Deno automatically converts a serde_json object to a JavaScript object. By reintroducing JSON deserialization in JavaScript, the deserialized objects have the appropriate empty prototype.
Fix for example https://altair-viz.github.io/gallery/bar_chart_trellis_compact.html
This reintroduces a JSON serialization step that fixes an obscure error. The error happened when the
heightof a Vega-Lite figure was an object. The error seems to happen because the height object had a null prototype, which seems to happen when Deno automatically converts a serde_json object to a JavaScript object. By reintroducing JSON deserialization in JavaScript, the deserialized objects have the appropriate empty prototype.