# recipes/static/browser.d.ts One file of [`recipes/static`](/docs/recipes/static), at commit `9a5bb24`. ```ts // The browser globals this recipe's Chromium callbacks name, declared loosely. // // `main.ts` runs in Node and its `addInitScript` and `evaluate` callbacks run in Chromium, so // the file has to typecheck without the DOM library while the browser supplies the real // objects. Narrow shapes, so a typo is still caught. interface WatchedNode { readonly nodeType: number; readonly nodeName: string; contains(node: unknown): boolean; } declare const document: { readonly readyState: string; readonly body: WatchedNode | null; }; interface WatchedMutation { readonly target: WatchedNode; readonly addedNodes: ArrayLike & Iterable; readonly removedNodes: ArrayLike & Iterable; } declare const MutationObserver: { new(callback: (records: readonly WatchedMutation[]) => void): { // The document itself, because an init script runs before the parser has made . observe(target: unknown, options: { childList?: boolean; subtree?: boolean }): void; }; }; ```