/**
 * The runtime's own elements in the page's `<body>`: the highlight box, the
 * flash layer, the element picker. A page that swaps in a new `<body>`
 * instead of loading one (Turbo Drive, which webawesome.com uses, and some
 * routers) takes them out with the old one, and they would stay detached:
 * no outline on hover, no flash, no picker. So each one kept here is moved
 * into the new `<body>` as it arrives, by one observer of `<html>`'s own
 * children, which hears of the swap and of nothing else.
 */
/**
 * Appends `el` to the `<body>` and keeps it in whichever `<body>` the page
 * has from then on.
 */
export declare const keepInBody: (el: Element) => void;
//# sourceMappingURL=body-keeper.d.ts.map