RStudio, an IDE for R, has made tons of improvements over the past 5 years and one of them is the ability to run non-R code (including the output from said non-R code) inline, within an RMarkdown document. In light of this functionality, today’s post will run through an example of how to run JavaScript - specifically, d3.js, a JS library for “manipulating documents based on data” - within RStudio using the library r2d3.