What is arguments[0] while invoking execute_script() method through WebDriver instance through Selenium and Python?

Question

I'm trying to crawl the pages that I interested in. For this, I need to remove attribute of element from HTML. 'style' is what I want to remove. So I find some codes from Stackoverflow.(i'm using Chrome for driver)

element = driver.find_element_by_xpath("//select[@class='m-tcol-c' and @id='searchBy']")
driver.execute_script("arguments[0].removeAttribute('style')", element)

What does arguments[0] do in the code? Can anyone explain arguments[0]'s roles concretely?

Answer 1

arguments is what you're passing from Python to JavaScript that you want to execute.

driver.execute_script("arguments[0].removeAttribute('style')", element) 

means that you want to "replace" arguments[0] with WebElement stored in element variable.

This is the same as if you defined that element in JavaScript:

driver.execute_script("document.querySelector('select.m-tcol-c#searchBy').removeAttribute('style')")

You can also pass more arguments as

driver.execute_script("arguments[0].removeAttribute(arguments[1])", element, "style")

Answer 2

element = driver.find_element_by_xpath("//select[@class='m-tcol-c' and @id='searchBy']")  

Here, element is a web element.

and in this call:

driver.execute_script("arguments[0].removeAttribute('style')", element)  

You are passing element(Which is a web element) as a arguments[0]

removeAttribute('style') must be a method in JS. and using arguments[0] you are invoking this method.