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Usage without a reference HTMLElement

Whenever you need to position a popper based on some arbitrary coordinates, you can provide Popper with a virtual element.

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import { usePopper } from 'react-popper';

// This is going to create a virtual reference element
// positioned 10px from top and left of the document
// 90px wide and 10px high
const virtualReference = {
  getBoundingClientRect() {
    return {
      top: 10,
      left: 10,
      bottom: 20,
      right: 100,
      width: 90,
      height: 10,
    };
  },
};

const Example = () => {
  const [popperElement, setPopperElement] = React.useState(null);
  const { styles, attributes } = usePopper(virtualReference, popperElement);

  return (
    <div ref={setPopperElement} style={styles.popper} {...attributes.popper}>
      Popper element
    </div>
  );
};
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