{
  "version": 3,
  "sources": ["../src/focus-guards.tsx"],
  "sourcesContent": ["import * as React from 'react';\n\n/** Number of components which have requested interest to have focus guards */\nlet count = 0;\n\n/**\n * Cached references to the single shared pair of edge guards. Keeping these at\n * module scope lets us avoid scanning the whole document (`querySelectorAll`)\n * and re-inserting the guards on every overlay mount.\n */\nlet guards: { start: HTMLSpanElement; end: HTMLSpanElement } | null = null;\n\ninterface FocusGuardsProps {\n  children?: React.ReactNode;\n}\n\nfunction FocusGuards(props: FocusGuardsProps) {\n  useFocusGuards();\n  return props.children;\n}\n\n/**\n * Injects a pair of focus guards at the edges of the whole DOM tree\n * to ensure `focusin` & `focusout` events can be caught consistently.\n */\nfunction useFocusGuards() {\n  React.useEffect(() => {\n    if (!guards) {\n      guards = { start: createFocusGuard(), end: createFocusGuard() };\n    }\n    const { start, end } = guards;\n\n    // Only mutate the DOM when the edge invariant is actually broken. Writing\n    // to `document.body` dirties layout and forces a synchronous reflow once\n    // sibling effects read layout (Popper measuring, react-remove-scroll,\n    // aria-hidden, FocusScope), so skipping no-op moves avoids that cost on\n    // every mount. The trailing guard still gets re-asserted to last whenever a\n    // newly portaled node lands after it (portals append to the end of\n    // `document.body`). See https://github.com/radix-ui/primitives/issues/2812\n    if (document.body.firstElementChild !== start) {\n      document.body.insertAdjacentElement('afterbegin', start);\n    }\n    if (document.body.lastElementChild !== end) {\n      document.body.insertAdjacentElement('beforeend', end);\n    }\n    count++;\n\n    return () => {\n      if (count === 1) {\n        guards?.start.remove();\n        guards?.end.remove();\n        guards = null;\n      }\n      count = Math.max(0, count - 1);\n    };\n  }, []);\n}\n\nfunction createFocusGuard() {\n  const element = document.createElement('span');\n  element.setAttribute('data-radix-focus-guard', '');\n  element.tabIndex = 0;\n  element.style.outline = 'none';\n  element.style.opacity = '0';\n  element.style.position = 'fixed';\n  element.style.pointerEvents = 'none';\n  return element;\n}\n\nexport {\n  FocusGuards,\n  //\n  FocusGuards as Root,\n  //\n  useFocusGuards,\n};\n"],
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