invoke javascript codes inside ruby on macos to automate macOS features

runjs.rb

require 'open3'
require 'shellwords'
require 'json'

def runjs(script)
  command = ['osascript', '-ss', '-l', 'JavaScript']
  script.split(/\n/).each { |l| command.concat ['-e', l] }
  output, status = Open3.capture2(command.shelljoin)
  raise "osascript didn't run successfully!" unless status.success?

  JSON.parse(output)
end

result = runjs <<-END
var app = Application.currentApplication()
app.includeStandardAdditions = true

var dialogText = "The current date and time is " + (app.currentDate())
app.displayDialog(dialogText)
END

puts result["buttonReturned"]