[Material][Popover] Add support for virtual element as anchorEl

docs/data/material/components/popover/VirtualElementPopover.js

@@ -0,0 +1,58 @@
+import * as React from 'react';
+import Popover from '@mui/material/Popover';
+import Typography from '@mui/material/Typography';
+import Paper from '@mui/material/Paper';
+
+export default function VirtualElementPopover() {
+  const [open, setOpen] = React.useState(false);
+  const [anchorEl, setAnchorEl] = React.useState(null);
+
+  const handleClose = () => {
+    setOpen(false);
+  };
+
+  const handleMouseUp = () => {
+    const selection = window.getSelection();
+
+    // Skip if selection has a length of 0
+    if (!selection || selection.anchorOffset === selection.focusOffset) {
+      return;
+    }
+
+    const getBoundingClientRect = () => {
+      return selection.getRangeAt(0).getBoundingClientRect();
+    };
+
+    setOpen(true);
+
+    setAnchorEl({ getBoundingClientRect, nodeType: 1 });
+  };
+
+  const id = open ? 'virtual-element-popover' : undefined;
+
+  return (
+    <div>
+      <Typography aria-describedby={id} onMouseUp={handleMouseUp}>
+        Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam ipsum purus,
+        bibendum sit amet vulputate eget, porta semper ligula. Donec bibendum
+        vulputate erat, ac fringilla mi finibus nec. Donec ac dolor sed dolor
+        porttitor blandit vel vel purus. Fusce vel malesuada ligula. Nam quis
+        vehicula ante, eu finibus est. Proin ullamcorper fermentum orci, quis finibus
+        massa. Nunc lobortis, massa ut rutrum ultrices, metus metus finibus ex, sit
+        amet facilisis neque enim sed neque. Quisque accumsan metus vel maximus
+        consequat. Suspendisse lacinia tellus a libero volutpat maximus.
+      </Typography>
+      <Popover
+        id={id}
+        open={open}
+        anchorEl={anchorEl}
+        anchorOrigin={{ vertical: 'bottom', horizontal: 'left' }}
+        onClose={handleClose}
+      >
+        <Paper>
+          <Typography sx={{ p: 2 }}>The content of the Popover.</Typography>
+        </Paper>
+      </Popover>
+    </div>
+  );
+}

docs/data/material/components/popover/VirtualElementPopover.tsx

@@ -0,0 +1,58 @@
+import * as React from 'react';
+import Popover, { PopoverProps } from '@mui/material/Popover';
+import Typography from '@mui/material/Typography';
+import Paper from '@mui/material/Paper';
+
+export default function VirtualElementPopover() {
+  const [open, setOpen] = React.useState(false);
+  const [anchorEl, setAnchorEl] = React.useState<PopoverProps['anchorEl']>(null);
+
+  const handleClose = () => {
+    setOpen(false);
+  };
+
+  const handleMouseUp = () => {
+    const selection = window.getSelection();
+
+    // Skip if selection has a length of 0
+    if (!selection || selection.anchorOffset === selection.focusOffset) {
+      return;
+    }
+
+    const getBoundingClientRect = () => {
+      return selection.getRangeAt(0).getBoundingClientRect();
+    };
+
+    setOpen(true);
+
+    setAnchorEl({ getBoundingClientRect, nodeType: 1 });
+  };
+
+  const id = open ? 'virtual-element-popover' : undefined;
+
+  return (
+    <div>
+      <Typography aria-describedby={id} onMouseUp={handleMouseUp}>
+        Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam ipsum purus,
+        bibendum sit amet vulputate eget, porta semper ligula. Donec bibendum
+        vulputate erat, ac fringilla mi finibus nec. Donec ac dolor sed dolor
+        porttitor blandit vel vel purus. Fusce vel malesuada ligula. Nam quis
+        vehicula ante, eu finibus est. Proin ullamcorper fermentum orci, quis finibus
+        massa. Nunc lobortis, massa ut rutrum ultrices, metus metus finibus ex, sit
+        amet facilisis neque enim sed neque. Quisque accumsan metus vel maximus
+        consequat. Suspendisse lacinia tellus a libero volutpat maximus.
+      </Typography>
+      <Popover
+        id={id}
+        open={open}
+        anchorEl={anchorEl}
+        anchorOrigin={{ vertical: 'bottom', horizontal: 'left' }}
+        onClose={handleClose}
+      >
+        <Paper>
+          <Typography sx={{ p: 2 }}>The content of the Popover.</Typography>
+        </Paper>
+      </Popover>
+    </div>
+  );
+}

docs/data/material/components/popover/popover.md

@@ -36,6 +36,33 @@ This demo demonstrates how to use the `Popover` component and the mouseover even
 
 {{"demo": "MouseOverPopover.js"}}
 
+## Virtual element
+
+The value of the `anchorEl` prop can be a reference to a fake DOM element.
+You need to provide an object with the following interface:
+
+```ts
+interface PopoverVirtualElement {
+  nodeType: 1;
+  getBoundingClientRect: () => DOMRect;
+}
+```
+
+Highlight part of the text to see the popover:
+
+{{"demo": "VirtualElementPopover.js"}}
+
+For more information on the virtual element's properties, see the following resources:
+
+- [getBoundingClientRect](https://developer.mozilla.org/docs/Web/API/Element/getBoundingClientRect)
+- [DOMRect](https://drafts.fxtf.org/geometry-1/#domrectreadonly)
+- [Node types](https://developer.mozilla.org/docs/Web/API/Node/nodeType)
+
+:::warning
+The usage of a virtual element for the Popover component requires the `nodeType` property.
+This is different from virtual elements used for the [`Popper`](/material-ui/react-popper/#virtual-element) or [`Tooltip`](/material-ui/react-tooltip/#virtual-element) components, both of which don't require the property.
+:::
+
 ## Complementary projects
 
 For more advanced use cases, you might be able to take advantage of:

docs/translations/api-docs/popover/popover.json

@@ -2,7 +2,7 @@
   "componentDescription": "",
   "propDescriptions": {
     "action": "A ref for imperative actions. It currently only supports updatePosition() action.",
-    "anchorEl": "An HTML element, or a function that returns one. It's used to set the position of the popover.",
+    "anchorEl": "An HTML element, <a href=\"/material-ui/react-popover/#virtual-element\">PopoverVirtualElement</a>, or a function that returns either. It&#39;s used to set the position of the popover.",
     "anchorOrigin": "This is the point on the anchor where the popover&#39;s <code>anchorEl</code> will attach to. This is not used when the anchorReference is &#39;anchorPosition&#39;.<br>Options: vertical: [top, center, bottom]; horizontal: [left, center, right].",
     "anchorPosition": "This is the position that may be used to set the position of the popover. The coordinates are relative to the application&#39;s client area.",
     "anchorReference": "This determines which anchor prop to refer to when setting the position of the popover.",

packages/mui-material/src/Popover/Popover.d.ts

@@ -20,6 +20,11 @@ export interface PopoverPosition {
 
 export type PopoverReference = 'anchorEl' | 'anchorPosition' | 'none';
 
+interface PopoverVirtualElement {
+  getBoundingClientRect: () => DOMRect;
+  nodeType: Node['ELEMENT_NODE'];
+}
+
 export interface PopoverProps
   extends StandardProps<Omit<ModalProps, 'slots' | 'slotProps'>, 'children'> {
   /**
@@ -28,10 +33,16 @@ export interface PopoverProps
    */
   action?: React.Ref<PopoverActions>;
   /**
-   * An HTML element, or a function that returns one.
+   * An HTML element, [PopoverVirtualElement](/material-ui/react-popover/#virtual-element),
+   * or a function that returns either.
    * It's used to set the position of the popover.
    */
-  anchorEl?: null | Element | ((element: Element) => Element);
+  anchorEl?:
+    | null
+    | Element
+    | (() => Element)
+    | PopoverVirtualElement
+    | (() => PopoverVirtualElement);
   /**
    * This is the point on the anchor where the popover's
    * `anchorEl` will attach to. This is not used when the

packages/mui-material/src/Popover/Popover.js

@@ -428,7 +428,8 @@ Popover.propTypes /* remove-proptypes */ = {
    */
   action: refType,
   /**
-   * An HTML element, or a function that returns one.
+   * An HTML element, [PopoverVirtualElement](/material-ui/react-popover/#virtual-element),
+   * or a function that returns either.
    * It's used to set the position of the popover.
    */
   anchorEl: chainPropTypes(PropTypes.oneOfType([HTMLElementType, PropTypes.func]), (props) => {
@@ -457,7 +458,7 @@ Popover.propTypes /* remove-proptypes */ = {
         return new Error(
           [
             'MUI: The `anchorEl` prop provided to the component is invalid.',
-            `It should be an Element instance but it's \`${resolvedAnchorEl}\` instead.`,
+            `It should be an Element or PopoverVirtualElement instance but it's \`${resolvedAnchorEl}\` instead.`,
           ].join('\n'),
         );
       }

packages/mui-material/src/Popover/Popover.test.js

@@ -448,6 +448,38 @@ describe('<Popover />', () => {
       );
       expect(anchorElSpy.callCount).to.be.greaterThanOrEqual(1);
     });
+
+    it('should accept a virtual element', () => {
+      const top = 100;
+      const left = 300;
+      const virtualElement = {
+        nodeType: 1,
+        getBoundingClientRect: () => ({
+          x: 0,
+          y: 0,
+          top,
+          left,
+          bottom: 0,
+          right: 0,
+          height: 0,
+          width: 0,
+        }),
+      };
+      render(
+        <Popover
+          open
+          anchorEl={virtualElement}
+          transitionDuration={0}
+          slotProps={{ paper: { 'data-testid': 'paper' } }}
+        >
+          <div />
+        </Popover>,
+      );
+      expect(screen.getByTestId('paper')).toHaveInlineStyle({
+        top: `${top}px`,
+        left: `${left}px`,
+      });
+    });
   });
 
   describe('positioning on an anchor', () => {
@@ -569,7 +601,7 @@ describe('<Popover />', () => {
           'prop',
           'MockedPopover',
         );
-      }).toErrorDev('It should be an Element instance');
+      }).toErrorDev('It should be an Element or PopoverVirtualElement instance');
     });
 
     it('warns if a component for the Paper is used that cant hold a ref', () => {