Selenium (C#), finding elements using JavaScript fails

Question

I am trying to find web elements using JavaScript. First element is being found. When I use similar code to find another element, I get null ref. exception. When I enter code into developer tools (F12), element is being found.

Here is the code I use:

IJavaScriptExecutor js = Driver as IJavaScriptExecutor;
IWebElement ChangeAccessRightsLink = (IWebElement)js.ExecuteScript("return document.getElementsByClassName('aaaaaaaaa')[1];");
ChangeAccessRightsLink.Click();
IJavaScriptExecutor jss = Driver as IJavaScriptExecutor; //AddNewAccessRightButton =null :(
IWebElement AddNewAccessRightButton = (IWebElement)jss.ExecuteScript("return document.getElementsByClassName('bbbbbbbbb')[0];");

You are kinda defeating the point of using Selenium when you use JSE like this. Why not just grab the element with Selenium? You aren't doing anything in JSE that you can't do with Selenium anyway. — JeffC
– JeffC, Commented Oct 4, 2017 at 14:11
I agree, @iamsanklap89. Selenium driver on C# simply couldn't find it neither using XPath, nor Class. Since I wanted it to be fixed fast, I used JavaScript. — KoBe Brajantas
– KoBe Brajantas, Commented Oct 6, 2017 at 6:29

Shubham Jain · Accepted Answer · 2017-10-04 11:31:02Z

1

You need a wait till your JS is not ready. Try Explicit wait, fluent wait .

answered Oct 4, 2017 at 11:31

Shubham Jain

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2 Comments

KoBe Brajantas Over a year ago

And that was absolutely correct answer! Amazing, how simple it was - adding an extra second worked out.

Shubham Jain Over a year ago

Glad it works for you. voted you up. You will now get a privilege to vote up posts :)

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