Run a javascript function of a website using Python

Question

I've been wondering whether or not this is possible -

Here is a picture of Chrome's "inspect element" on this website. enter image description here

Is it possible for me to run the "goCourseDetails" js function with my own parameters?

I'm using Python and selenium to try and write a script that does that for me, but I don't know how to access the JS function.

Thanks in advance.

• cli-ish: over the buildin browser developer tools. F12 -> Konsole -> print your jscode
• Barak B: Thanks for the answer, it's not helping me much though. Firstly because I want to be able to access it with python, and secondly, for example, in the screenshot I attached to the question, running the function like this will render mainForm as undefined and so this cannot be run like that. Any ideas?

Answer 1

You can use driver.execute_script() to execute javascript snippet in browser.

The function goCourseDetails can be obtain from browser global variable window

driver.execute_script('window.goCourseDetails.call(null, arguments)',
 <department>, <degreelevel>, <course>, <detail>, <year>, <semester>
)

• Barak B: Hey, this looks like a nice solution, however when I'm doing this, I run into Cannot set property 'target' of undefined (so document.mainForm is probably null) is there a way to get over this?
• Barak B: The idea is that there's a button, that on click runs <a href="javascript:goCourseDetails('201','1','2391','1','2019','1')">Clickme</a> and I can't access the actual element <a>, and so I want to be able to "click" it, or run the function that it runs when clicked.
• yong: Can you succeed to execute goCourseDetails('201','1','2391','1','2019','1') in browser' console in Developer Tool.
• Barak B: I can run it on F12 -> Console, if that's what you meant. How does this help though?
• Barak B: Apparently I've done something wrong causing target to be undefined, it's working now, thanks!