How to Access and Interact with Shadow DOM Elements in Chrome's 'Clear Browsing Data' Dialog Using Selenium?

Interfacing with Shadow DOM Elements Within #shadow-root (open) While Clearing Chrome Browser Data via CSS Selector

While automating the Chrome browser's "Clear Browsing Data" popup through Selenium, accessing elements within #shadow-root (open), such as the "Clear data" button, can be challenging. This is due to the fact that shadow DOM elements are not directly accessible via the regular DOM tree.

Locating the Shadow Host and Root

To interact with shadow DOM elements, we first need to identify the shadow host, which is the element in the main DOM that contains the shadow DOM. Once the shadow host is located, we can use the getShadowRoot() method from the Selenium JavaScript Executor to retrieve the shadow root of the host.

Traversing Shadow Levels

In cases where there are multiple levels of shadow DOM, we need to traverse these levels to reach the desired element. To do this, we can recursively repeat the above process by locating the shadow host within the current shadow root and then retrieving its shadow root using getShadowRoot().

Example Code

The following example demonstrates how to use the getShadowRoot() method and recursive traversal to access the "Clear data" button within the "Clear Browsing Data" popup:

JavascriptExecutor js = (JavascriptExecutor) driver;
WebElement shadowHost = driver.findElement(By.cssSelector("settings-ui"));
WebElement shadowRoot = (WebElement) js.executeScript("return arguments[0].shadowRoot", shadowHost);
WebElement clearData = (WebElement) js.executeScript("return document.querySelector('settings-ui').shadowRoot.querySelector('settings-main').shadowRoot.querySelector('settings-basic-page').shadowRoot.querySelector('settings-section > settings-privacy-page').shadowRoot.querySelector('settings-clear-browsing-data-dialog').shadowRoot.querySelector('#clearBrowsingDataDialog').querySelector('#clearBrowsingDataConfirm')");
clearData.click();

By leveraging this approach, you can effectively interact with elements within #shadow-root (open) and perform desired actions.

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