Disabling Javascript in Chrome (-headless) with the help of PHP Webdriver

I am experimenting with using Chrome without JavaScript enabled.

I attempted to disable JavaScript by adding the --disable-javascript command line argument.

I also tried some experimental options:

        $options->setExperimentalOption('prefs', [
            'profile.managed_default_content_settings.javascript' => 2//this method didn't work
            //,'profile.default_content_setting_values.javascript' => 2//this approach also did not work
        ]);

        $capabilities = DesiredCapabilities::chrome();
        $capabilities->setCapability(ChromeOptions::CAPABILITY, $options);

Unfortunately, neither of these methods were successful in disabling JavaScript in Chrome.

My question is: How can I effectively disable JavaScript in Chrome using the Facebook PHP Webdriver?

To verify if JavaScript is indeed disabled, here is a test snippet:

        $this->driver->get('https://www.whatismybrowser.com/detect/is-javascript-enabled');
        return [
            $this->driver->getTitle(),
            $this->driver->findElement(WebDriverBy::cssSelector('.detected_result'))->getText()
        ];
javascriptphpgoogle-chromeseleniumubuntu-16.04

Answer №1

It's just not possible. Check out this informative link here

Attention: Disabling JavaScript is not supported and may cause significant issues with ChromeDriver's functionality. You might only be able to navigate to a webpage at best. This use case is not endorsed, and we will not provide support for it. Marking this as WontFix - ChromeDriver (and most other WebDriver implementations) rely on JavaScript to operate.

Answer №2

If you want to prevent the execution of JavaScript, you can achieve this by adjusting certain preferences:

"webkit.webprefs.javascript_enabled": false
"profile.content_settings.exceptions.javascript.*.setting": 2
"profile.default_content_setting_values.javascript": 2
"profile.managed_default_content_settings.javascript": 2

However, it's important to note that currently this feature is not supported in headless mode. This is because the preferences are not loaded and there isn't a specific command switch available for this functionality.

In the past, disabling JavaScript would cause issues with Selenium since many commands rely on atom scripts injected into the page. This is no longer the case as all commands are now able to run successfully. One thing to consider though is that the text returned may not include content from a <noscript> element (text that is displayed only when JavaScript is disabled). To work around this, you can read the innerText property using either execute_script or get_attribute.

Answer №3

While the traditional headless mode in Chrome doesn't allow disabling JavaScript, there is a more recent version of headless mode that has no such limitations.

Developers at Chromium have recently introduced a second headless mode that operates similarly to regular Chrome.

The updated method: --headless=chrome

The original method: --headless

You can find more information on this update here: https://bugs.chromium.org/p/chromium/issues/detail?id=706008#c36

Now, with the newer headless mode, you have the option to disable JavaScript.

Answer №4

It has been noted by others that disabling JavaScript in Chrome while using headless mode is still not possible.

However, for future reference, here is the method to do so (without using the --headless argument):

        $options = new ChromeOptions();

        $options->setExperimentalOption('prefs', [
            'profile.managed_default_content_settings.javascript' => 2,
        ]);

        $result = DesiredCapabilities::chrome();

        $result->setCapability(
            ChromeOptions::CAPABILITY_W3C,
            // php-webdriver currently has a bug that requires ->toArray()!
            $options->toArray()
        );

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