I don't know why would you need that as the change will only be applicable to
particular that browser session and won't persist, but just in case to give
you an idea, it can be done via executeScript()
<https://code.google.com/p/selenium/wiki/FrequentlyAskedQuestions#Q:_How_do_I_execute_Javascript_directly?>
method.
For instance the following code:
1. Opens "example.com" website
2. Waits for 5 seconds (mention "Example Domain" black bold line)
3. Sets its opacity to 0
4. Waits for another 5 seconds (you won't be able to see "Example Domain"
line at this stage)
> WDS.browser.get('http://example.com')
> java.lang.Thread.sleep(5000)
> WDS.browser.executeScript('document.getElementsByTagName("h1")[0].setAttribute("style","opacity:0.0;
> -moz-opacity:0.0; filter:alpha(opacity=0)");')
> java.lang.Thread.sleep(5000)
See The WebDriver Sampler: Your Top 10 Questions Answered
<https://blazemeter.com/blog/webdriver-sampler-your-top-10-questions-answered>
guide for more JMeter WebDriver Sampler tips and tricks.
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