Shiny apps that use DiagrammeR don't work when deployed on shinyapps.io or Shiny Server Pro

[wch]

This happens because Shiny Server inserts a <base> tag in the HTML body, which causes problems with some SVG elements, like arrowheads and gradients.

Fortunately, the latest version of mermaid.js has a fix for this (thanks to yours truly), so simply including the latest version should fix it for DiagrammeR. See mermaid-js/mermaid#209 for more information about this problem.

[rich-iannone]

@wch thanks very much for doing all this! I think @timelyportfolio added in the latest release of mermaid.js in a recent PR (and it was accepted). Kent: can you verify that that version was indeed the latest build?

[wch]

I think the needed version of mermaid.js (0.5.2) was released 2 days ago, and your version is 0.5.1 (I found this by searching the mermaid.slim.min.js file for version).

[rich-iannone]

@wch thanks again. The most recent version of mermaid.slim.min.js (0.5.3) is now part of the package (along with the updated mermaid.css file).

[wch]

Great, thanks for updating it!