DiagrammeR              R + mermaid.js
DiagrammeROutput        Widget output function for use in Shiny
grViz                   R + viz.js
grVizOutput             Widget output function for use in Shiny
mermaid                 R + mermaid.js
renderDiagrammeR        Widget render function for use in Shiny
renderGrViz             Widget render function for use in Shiny
replace_in_spec         Razor-like Template for Diagram Spec
