A portable, lightweight, zero-dependency JavaScript engine for R, using QuickJS.
Values and objects are directly passed between R and QuickJS, with no need for serialization or deserialization. This both reduces overhead allows for more complex data structures to be passed between R and JavaScript - including functions.
You can install the development version of QuickJSR from GitHub with:
Or you can install pre-built binaries from R-Universe:
install.packages("QuickJSR", repos = c("https://andrjohns.r-universe.dev",
"https://cran.r-project.org"))
For standalone or simple JavaScript code, you can use the qjs_eval()
function:
For more complex interactions, you can create a QuickJS context and evaluate code within that context:
Use the $source()
method to load JavaScript code into the context:
# Code can be provided as a string
ctx$source(code = "function add(a, b) { return a + b; }")
# Or read from a file
writeLines("function subtract(a, b) { return a - b; }", "subtract.js")
ctx$source(file = "subtract.js")
Then use the $call()
method to call a specified function with arguments:
You can also pass R functions to be evaluated using JavaScript arguments: