Unable to locate the child iframe element which is within the parent iframe through Selenium in Java

So far, this is what I have: I've switched the frame to its parent frame then to the the frame I am unable to locate:

By frame = By.xpath("//iframe[@class='GenCss_style-Model']");

driver.switchTo().frame(driver.findElement(By.name("documentflowdesk")));
driver.switchTo().frame(driver.findElement(frame));

Since 'frame' element is not found, I get this error:

org.openqa.selenium.NoSuchElementException: Unable to locate element

HTML:

<iframe src="about:blank" name="documentflowdesk" class="gwt-Frame-NavigationComponentViewImplResourcesapplicationFrame" id="documentflowdesk" style="position: absolute; left: 0px; top: 0px; visibility: visible; height: 100%;"></iframe>    
#documentflowdesk
<html style="overflow: hidden;">
    <head>...</head>
    <body style="margin: 0px;" class="dragdrop-dropTarget dragdrop-boundary">
    <noscript>...</noscript>
    <div style="position: absolute; overflow: hidden; left: 0px; top: 0px; right: 0px; bottom: 0px;">
        <div class="css-DeskStyleResources" style="position: absolute; left: 0px; top: 0px; right: 0px; bottom: 0px;">
            <div style="position: absolute; overflow: hidden; left: 0px; top: 0px; right: 0px; bottom: 0px;">
                <div style="position: absolute; left: 0px; top: 0px; right: 0px; bottom: 0px;">
                    <div style="position: absolute; overflow: hidden; left: 0px; top: 0px; right: 0px; bottom: 0px;">
                        <iframe class="GenCss_style-Model" src="/model/?modelId=100&amp;docGroupId=164&amp;connectionPointId=73" style="position: absolute; left: 0px; top: 0px; right: 0px; bottom: 0px;"></iframe>

The iframe I'm trying to locate is inside multiple div. Does it have to do anything with the error? Or is there a problem with how I find my element?

As per the HTML once you are on the parent frame you have to:

Induce WebDriverWait for the parent frame to be available and switch to it.
Induce WebDriverWait for the child frame to be available and switch to it.

You can use the following solution:

new WebDriverWait(driver, 10).until(ExpectedConditions.frameToBeAvailableAndSwitchToIt(By.xpath("//iframe[@class='gwt-Frame-NavigationComponentViewImplResourcesapplicationFrame' and @id='documentflowdesk']")));
new WebDriverWait(driver, 10).until(ExpectedConditions.frameToBeAvailableAndSwitchToIt(By.xpath("//iframe[@class='GenCss_style-Model' and contains(@src,'connectionPointId')]")));

Here you can find a relevant discussion on Ways to deal with #document under iframe

Kamil Khan

Please try below code:

driver.switchTo().frame(driver.findelement(By.xpath(//iframe[@name='documentflowdesk']);

Thread.sleep(5000);

driver.switchTo().frame(driver.findelement(By.xpath(//ifame[@class='GenCss_style-Model']);

来源：https://stackoverflow.com/questions/53165931/unable-to-locate-the-child-iframe-element-which-is-within-the-parent-iframe-thro

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java

selenium

selenium-webdriver

iframe

webdriverwait