Question

How can I include javascript code into my shiny R dashboard?

Answer 1

There are multiple ways doing this. One of the way is using inline script text. 

include a <script> tag directly in your Shiny UI, using tags$script() and HTML():

ui <- fluidPage(
  tags$script(HTML(
    "document.body.style.backgroundColor = 'skyblue';"
  ))
)

Answer 2

Adding to @Maverick's answer, I'd like to add, another option is creating a separate .js file and saving it in a www subdirectory (it must be directly under your app directory). This is only slightly less convenient than inlined script text, and removes most of the downsides.

www/myscript.js:

document.body.style.backgroundColor = "red";

app.R:

ui <- fluidPage(
  tags$script(src = "myscript.js")
)

Answer 3

You can also use htmlDependancy, like this:

mypackageDependencies <- function() {
  htmlDependency(name = "mypackage-assets", version = "0.1",
    package = "mypackage",
    src = "assets",
    script = "js/myscript.js",
    stylesheet = c("css/reset.css", "css/mystyles.css")
  )
}

Answer 4

To include JavaScript, use includeScript() or
1. Place the file in the www subdirectory
2. Link to it with

tags$head(tags$script(src = "<file name>"))