Selenium Python bindings: how to execute JavaScript on an element?

Question

Have used python selenium script to trigger selenium server to run JavaScript code. It works fine.

drv.execute_script('<some js code>')

However, I can't figure out how to run javascript code on an element that was retrieved using get_element_by_*() api. For example, I

ele = get_element_by_xpath('//button[@id="xyzw"]');
#question: how do I change the "style" attribute of the button element?

If I were on developer console of the browser, I can run it as

ele = $x('//button[@id="xyzw"]')[0]
ele.setAttribute("style", "color: yellow; border: 2px solid yellow;")

Just don't know how to do it in python selenium script. Thanks in advance.

Take a look at the JavascriptExecutor interface in Selenium. — Brian
– Brian, Commented Aug 18, 2014 at 17:28
Thanks @Brian for the link. It's for java binding, nevertheless, it makes me understand what the "arguments" in the working solution "...arguments[0].setAttribute(....)" means. It's used by javascript to refer to the function parameter (esp when the number of parameters to the function is variable). — packetie
– packetie, Commented Aug 18, 2014 at 17:38

Richard · Accepted Answer · 2014-08-18 17:45:58Z

17

execute_script accepts arguments, so you can pass the element:

drv.execute_script('arguments[0].setAttribute("style", "color: yellow; border: 2px solid yellow;")', ele)

edited Aug 18, 2014 at 17:45

answered Aug 18, 2014 at 17:14

Richard

9,0393 gold badges41 silver badges48 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

packetie Over a year ago

thanks for the quick reply. I tried drv.execute_script(arguments[0].setAttribute("style", "color: yellow; border: 2px solid yellow;"), ele); but got error: name 'arguments' is not defined. Any idea why?

packetie Over a year ago

Turned out I missed the single quote, the following works fine: drv.execute_script('arguments[0].setAttribute("style", "color: yellow; border: 2px solid yellow;")', ele) Hi @Richard, can you update your answer again so I can accept it?

Richard Over a year ago

@codingFun I kind of feel I only got you part of the way there, you're the one who took my syntactically wrong answer, and figured out the correct syntax. Having said that, if you're still willing to accept my answer, that's fine.

packetie · Accepted Answer · 2014-08-18 19:33:03Z

1

Thanks to the answer by @Richard who led me in the right direction and Brian's link (even thought it's for java) who helped me to figure out the meaning of "arguments".

The following code will do what I need.

ele = get_element_by_xpath('//button[@id="xyzw"]');
drv.execute_script('arguments[0].setAttribute("style", "color: yellow; border: 2px solid yellow;")', ele)

answered Aug 18, 2014 at 19:33

packetie

5,10712 gold badges42 silver badges81 bronze badges

Collectives™ on Stack Overflow

Selenium Python bindings: how to execute JavaScript on an element?

2 Answers 2

3 Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

3 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related