Selenium wait for Ajax content to load - universal approach

You need to wait for Javascript and jQuery to finish loading. Execute Javascript to check if jQuery.active is 0 and document.readyState is complete, which means the JS and jQuery load is complete.

public boolean waitForJSandJQueryToLoad() {    WebDriverWait wait = new WebDriverWait(driver, 30);    // wait for jQuery to load    ExpectedCondition<Boolean> jQueryLoad = new ExpectedCondition<Boolean>() {      @Override      public Boolean apply(WebDriver driver) {        try {          return ((Long)((JavascriptExecutor)getDriver()).executeScript("return jQuery.active") == 0);        }        catch (Exception e) {          // no jQuery present          return true;        }      }    };    // wait for Javascript to load    ExpectedCondition<Boolean> jsLoad = new ExpectedCondition<Boolean>() {      @Override      public Boolean apply(WebDriver driver) {        return ((JavascriptExecutor)getDriver()).executeScript("return document.readyState")        .toString().equals("complete");      }    };  return wait.until(jQueryLoad) && wait.until(jsLoad);}

As Mark Collin described in his book "Mastering Selenium Webdriver", use JavascriptExecutor let you figure out whether a website using jQuery has finished making AJAX calls

public class AdditionalConditions {  public static ExpectedCondition<Boolean> jQueryAJAXCallsHaveCompleted() {    return new ExpectedCondition<Boolean>() {        @Override        public Boolean apply(WebDriver driver) {            return (Boolean) ((JavascriptExecutor) driver).executeScript("return (window.jQuery != null) && (jQuery.active === 0);");        }    };  }}

I have been using this simple do while to iterate until an AJAX is finished. It consistently works for me.

public void waitForAjax() throws InterruptedException{    while (true)    {        Boolean ajaxIsComplete = (Boolean) ((JavascriptExecutor)driver).executeScript("return jQuery.active == 0");        if (ajaxIsComplete){            info("Ajax Call completed. ");            break;        }        Thread.sleep(150);    }}