Selenium - How to fix execute_script not returning any values after executing multiple javascript statements

Question

I want to return a string using execute_script to my python script, but I am not getting any string from my execute_script function

I tried a variation of my code that didn't work. Console.logging my code in chrome dev tools console works.

Here is my Python code that I am trying to execute. I expect the javascript variable to have a string inside, but it is empty.

javaScript = driver.execute_script('proposedProRata = document.querySelectorAll("#ProposedPercent")' + 'proposedProRataStr = ""' + 'for (let i = 0, element; element = proposedProRata[i++];) { proposedProRataStr = proposedProRataStr + element.value + " " }' + 'proposedProRataStr')

I expect a string proposedProRataStr to be returned so I can use it in my Python code, but I am not getting any string returned, with no error messages

supputuri · Accepted Answer · 2019-09-21 15:19:21Z

1

Here is the simple way to loop through all the matching elements and then return the value.

javascript = '''var proposedProRataStr = ""; document.querySelectorAll("#ProposedPercent").forEach(function(el) {proposedProRataStr = proposedProRataStr + el.value + " "});return proposedProRataStr; '''
jsOutput = driver.execute(javascript)
print(jsOutput)

Once you write the working code in the browser console, just wrap the entire javascript in ''' (so that you don't have to worry about handling the double quotes.

answered Sep 21, 2019 at 15:19

supputuri

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