Open an accordion with selenium in python

问题

I'm trying to open an accordion link with selenium in python.

The element looks like this when closed:

<div class="crm-accordion-body" style="display: none;">

and this when open:

<div class="crm-accordion-body" style="display: block;">

The code I'm trying to use to change the style is:

driver.execute_script("document.getElementsByClassName('crm-accordion-body').style.display = 'block';")

This produces the following error:

WebDriverException: Message: unknown error: Cannot set property 'display' of undefined
  (Session info: chrome=61.0.3163.100)
  (Driver info: chromedriver=2.33.506120 (e3e53437346286c0bc2d2dc9aa4915ba81d9023f),platform=Windows NT 6.1.7601 SP1 x86_64)

Anyone know what I'm doing wrong?

Thanks.

回答1:

Basically, document.getElementsByClassName('crm-accordion-body') returns a Node List. So we have to use index to get hold of the intended Node as follows :

document.getElementsByClassName('btn-pageMenu')[0].style.display

So as we are trying to change the style="display: none;" for the first node, try the following line of code :

driver.execute_script("document.getElementsByClassName('crm-accordion-body')[0].style.display='block';")

来源：https://stackoverflow.com/questions/47115719/open-an-accordion-with-selenium-in-python