Other output formats

[rnwst]

Currently, only HTML is supported. Where a to-be-inserted element is an SVG, it would be great if it could be made available to other output formats as well. This could be done by loading the output document in a headless browser (or alternatively in nodejs using jsdom), serialising the SVGs, and saving in a temp directory. Things would be a little bit more tricky where a provided expression is a function, as it would need to be evaluated on a placeholder element, and the DOM changes observed subsequently. Depending on the changes made to the DOM, one might then select an appropriate element to serialise (the original placeholder, if it hasn't been removed, or an element that has been inserted into the DOM).

For non-SVG elements, this could be done similarly, by serialising the HTML and using pandoc to parse them into an AST fragment. This might be rather involved, and as a first step only text elements could be considered.

[rnwst]

On second thought, serialisation and subsequent HTML-parsing using pandoc would work well where the to-be-inserted element is not an SVG, however where it is an SVG, the element should be screenshotted instead of serialised if it contains at least one <foreignObject> element. This is because the target format won't generally be able to render <foreignObject>s.