Function getViewportSize

packages/react-aria/src/utils/useViewportSize.ts:103–116

* Get the viewport size without the scrollbar.

()

 * Get the viewport size without the scrollbar.
 */
function getViewportSize(): ViewportSize {
  return {
    // Multiply by the visualViewport scale to get the "natural" size, unaffected by pinch zooming.
    width: visualViewport
      ? // The visual viewport width may include the scrollbar gutter. We should use the minimum width between
        // the visual viewport and the document element to ensure that the scrollbar width is always excluded.
        // See: https://github.com/w3c/csswg-drafts/issues/8099
        Math.min(visualViewport.width * visualViewport.scale, document.documentElement.clientWidth)
      : document.documentElement.clientWidth,
    height: visualViewport
      ? visualViewport.height * visualViewport.scale
      : document.documentElement.clientHeight
  };
}