Hound.Helpers.ScriptExecution

Execute javascript synchoronously.

• The first argument is the script to execute.

• The second argument is a list of arguments that is passed. These arguments are accessible in the script via arguments.

  
  execute_script("return(arguments[0] + arguments[1]);", [1, 2])
  
  execute_script("doSomething(); return(arguments[0] + arguments[1]);")
  
  

Execute javascript asynchoronously.

• The first argument is the script to execute.
• The second argument is a list of arguments that is passed. These arguments are accessible in the script via arguments.

Webdriver passes a callback function as the last argument to the script. When your script has completed execution, it has to call the last argument, which is a callback function, to indicate that the execute is complete.

# Once we perform whatever we want,
# we call the callback function with the arguments that must be returned.
execute_script_async("doSomething(); arguments[arguments.length-1]('hello')", [])

# We have no arguments to pass, so we'll skip the second argument.
execute_script_async("console.log('hello'); doSomething(); arguments[arguments.length-1]()")

Unless you call the callback function, the function is not assumed to be completed. It will error out.