How to target javascript element by it's onclick attribute via Selenium?

Question

I'm working with a webpage that has a number of javascript buttons that are written like this:

<a href="javascript:;" onclick="addtocart('888%20B0007VBRUE%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20',$(this),0)" class="btn btn-lblue pull-right">

Selenium can execute javascript, but I'm not quite sure how to format the javascript query to trigger the individual buy buttons. I tried:

driver.execute_script("document.getElementById("test").onclick = "addtocart('888%20B0007VBRUE%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20',$(this),0)").click()

but this gives me the error Message: document.getElementById(...) is null. How can I change what I've tried to get it to work?

I thought using fake links went out with browser sniffing. What is the point of href="javascript:;" when there are 3 classes already do to styling? — RobG
– RobG, Commented May 10, 2016 at 4:51
Didn't write the website in question, so I'm not really sure why they did it that way. — n1c9
– n1c9, Commented May 10, 2016 at 4:52

Aaron_H · Accepted Answer · 2016-05-10 03:47:08Z

2

This is because you have not added an id of test to your <a> tag. Also it is generally not advisable to lookup an element based on the value of its onclick handler.

Fixed code:

<a href="javascript:;" id="test" onclick="addtocart('888%20B0007VBRUE%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20',$(this),0)" class="btn btn-lblue pull-right">

In addition, you need to switch one of your " for ' in driver.execute script, because each " terminates the preceding string.

Example:

driver.execute_script('document.getElementById("test"),$(this),0)').click()

answered May 10, 2016 at 3:47

Aaron_H

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