There is no output from the Selenium JavascriptExecutor command

I have initialized a JavascriptExecutor but I am not getting the desired result. The object is always null.

SeleniumDriver driver = new SeleniumDriver(DriverType.ChromeDriver);
    driver.get("https://www.xxxxxx.info/");
    driver.waitForPageToBeLoaded();
        
    JavascriptExecutor js = (JavascriptExecutor) driver.getWebDriver();
    Object ob = js.executeScript("___grecaptcha_cfg.clients[0]");

When I check the console, this is what it shows:

https://i.sstatic.net/gIzn8.png

Why am I unable to retrieve the data using JavascriptExecutor?

javascriptjavaseleniumgoogle-chrome

Answer №1

To ensure your js script returns the desired outcome, consider implementing the following changes:

Object ob = js.executeScript("return ___grecaptcha_cfg.clients[0]");

Update your code as follows:

SeleniumDriver driver = new SeleniumDriver(DriverType.ChromeDriver);
driver.get("https://www.xxxxxx.info/");
driver.waitForPageToBeLoaded();
    
JavascriptExecutor js = (JavascriptExecutor) driver.getWebDriver();
Object ob = js.executeScript("return ___grecaptcha_cfg.clients[0]");

If encountering a circular reference exception due to the JS object being in JSON format, consider using the following JavaScript code snippet to convert it to JSON:

const getCircularReplacer = () => {
  const seen = new WeakSet();
  return (key, value) => {
    if (typeof value === "object" && value !== null) {
      if (seen.has(value)) {
        return;
      }
      seen.add(value);
    }
    return value;
  };
};
JSON.stringify(___grecaptcha_cfg.clients[0], getCircularReplacer());

If facing issues with a cross-origin iframe, Chrome may block it as illustrated in the image below:

https://i.sstatic.net/4L5Oq.png

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