Add mountNode prop to Popup module #4362
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If a React app with SUIR is running in a hidden IFRAME and rendering some or all of its virtual DOM to the parent frame or another frame, then the Popup component should not insert popup elements into the document.body of the React IFRAME, but instead should inject into the frame containing the Popup trigger, or even into some other container as may be more appropriate (due to size or layering concerns between multiple frames).
Adding a
mountNode
prop to Popup allows developers to specify the appropriate container for a displayed popup element in cases such as the above example.This PR implements a
mountNode
prop for Popup, with code very similar to the same prop's implementation in Modal.