dqshiny (version 0.0.3)

add_js: Adds a custom JS function

Description

Adds the given JS function definition to the current shiny web app.

Before adding anything the code will be parsed with V8 if the package is available on your machine. If package is available and parsing fails, an error will be thrown.

After successfully adding a function it can be used with run_js.

Usage

add_js(type, function_text)
run_js(type, ...)

Arguments

type

name of the function

function_text

JS function definition, this should be an anonymous function accepting exactly one argument

...

arguments to pass to the function, those will be combined to a list and end up as an array in JS, unnamed parameters will be available via params[0..], named parameters can also be used with params.name

Examples

# NOT RUN {
## Only run examples in interactive R sessions
if (interactive()) {

library(shiny)
shinyApp(
  ui = fluidPage(
    add_js(type="addValues", "function(params) {
      alert('Result is: ' + (parseInt(params[0]) + parseInt(params[1])));
    }"),
    add_js(type="myName", "function(params) {
      alert('My name is ' + params.name);
    }"),
    actionButton("btn1", "Add Values"),
    actionButton("btn2", "What's my name?")
  ),
  server = function(input, output) {
    observeEvent(input$btn1, run_js(type = "addValues", 17, 25))
    observeEvent(input$btn2, run_js(type = "myName", name = "Paul"))
  }
)

}
# }