next-csrf/example/.next/cache/next-babel-loader/860d97b550e0dab0a7056b04b287ee3d.json

CSRF mitigation library for Next.js

{"ast":null,"code":"\"use strict\";\n\nvar _interopRequireWildcard = require(\"@babel/runtime/helpers/interopRequireWildcard\");\n\nexports.__esModule = true;\nexports.default = void 0;\n\nvar _react = _interopRequireWildcard(require(\"react\"));\n\nvar _router = require(\"../next-server/lib/router/router\");\n\nvar _router2 = require(\"./router\");\n\nlet cachedObserver;\nconst listeners = new Map();\nconst IntersectionObserver = false ? window.IntersectionObserver : null;\nconst prefetched = {};\n\nfunction getObserver() {\n  // Return shared instance of IntersectionObserver if already created\n  if (cachedObserver) {\n    return cachedObserver;\n  } // Only create shared IntersectionObserver if supported in browser\n\n\n  if (!IntersectionObserver) {\n    return undefined;\n  }\n\n  return cachedObserver = new IntersectionObserver(entries => {\n    entries.forEach(entry => {\n      if (!listeners.has(entry.target)) {\n        return;\n      }\n\n      const cb = listeners.get(entry.target);\n\n      if (entry.isIntersecting || entry.intersectionRatio > 0) {\n        cachedObserver.unobserve(entry.target);\n        listeners.delete(entry.target);\n        cb();\n      }\n    });\n  }, {\n    rootMargin: '200px'\n  });\n}\n\nconst listenToIntersections = (el, cb) => {\n  const observer = getObserver();\n\n  if (!observer) {\n    return () => {};\n  }\n\n  observer.observe(el);\n  listeners.set(el, cb);\n  return () => {\n    try {\n      observer.unobserve(el);\n    } catch (err) {\n      console.error(err);\n    }\n\n    listeners.delete(el);\n  };\n};\n\nfunction prefetch(router, href, as, options) {\n  if (true) return;\n  if (!(0, _router.isLocalURL)(href)) return; // Prefetch the JSON page if asked (only in the client)\n  // We need to handle a prefetch error here since we may be\n  // loading with priority which can reject but we don't\n  // want to force navigation since this is only a prefetch\n\n  router.prefetch(href, as, options).catch(err => {\n    if (true) {\n      // rethrow to show invalid URL errors\n      throw err;\n    }\n  }); // Join on an invalid URI character\n\n  prefetched[href + '%' + as] = true;\n}\n\nfunction isModifiedEvent(event) {\n  const {\n    target\n  } = event.currentTarget;\n  return target && target !== '_self' || event.metaKey || event.ctrlKey || event.shiftKey || event.altKey || // triggers resource download\n  event.nativeEvent && event.nativeEvent.which === 2;\n}\n\nfunction linkClicked(e, router, href, as, replace, shallow, scroll) {\n  const {\n    nodeName\n  } = e.currentTarget;\n\n  if (nodeName === 'A' && (isModifiedEvent(e) || !(0, _router.isLocalURL)(href))) {\n    // ignore click for browser’s default behavior\n    return;\n  }\n\n  e.preventDefault(); //  avoid scroll for urls with anchor refs\n\n  if (scroll == null) {\n    scroll = as.indexOf('#') < 0;\n  } // replace state instead of push if prop is present\n\n\n  router[replace ? 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The prefetch attribute is no longer needed. More: https://err.sh/vercel/next.js/prefetch-true-deprecated');\n    }\n  }\n\n  const p = props.prefetch !== false;\n\n  const [childElm, setChildElm] = _react.default.useState();\n\n  const router = (0, _router2.useRouter)();\n  const pathname = router && router.pathname || '/';\n\n  const {\n    href,\n    as\n  } = _react.default.useMemo(() => {\n    const resolvedHref = (0, _router.resolveHref)(pathname, props.href);\n    return {\n      href: resolvedHref,\n      as: props.as ? 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React, { Children } from 'react'\nimport { UrlObject } from 'url'\nimport {\n  addBasePath,\n  isLocalURL,\n  NextRouter,\n  PrefetchOptions,\n  resolveHref,\n} from '../next-server/lib/router/router'\nimport { useRouter } from './router'\n\ntype Url = string | UrlObject\ntype RequiredKeys<T> = {\n  [K in keyof T]-?: {} extends Pick<T, K> ? never : K\n}[keyof T]\ntype OptionalKeys<T> = {\n  [K in keyof T]-?: {} extends Pick<T, K> ? K : never\n}[keyof T]\n\nexport type LinkProps = {\n  href: Url\n  as?: Url\n  replace?: boolean\n  scroll?: boolean\n  shallow?: boolean\n  passHref?: boolean\n  prefetch?: boolean\n}\ntype LinkPropsRequired = RequiredKeys<LinkProps>\ntype LinkPropsOptional = OptionalKeys<LinkProps>\n\nlet cachedObserver: IntersectionObserver\nconst listeners = new Map<Element, () => void>()\nconst IntersectionObserver =\n  typeof window !== 'undefined' ? window.IntersectionObserver : null\nconst prefetched: { [cacheKey: string]: boolean } = {}\n\nfunction getObserver(): IntersectionObserver | undefined {\n  // Return shared instance of IntersectionObserver if already created\n  if (cachedObserver) {\n    return cachedObserver\n  }\n\n  // Only create shared IntersectionObserver if supported in browser\n  if (!IntersectionObserver) {\n    return undefined\n  }\n\n  return (cachedObserver = new IntersectionObserver(\n    (entries) => {\n      entries.forEach((entry) => {\n        if (!listeners.has(entry.target)) {\n          return\n        }\n\n        const cb = listeners.get(entry.target)!\n        if (entry.isIntersecting || entry.intersectionRatio > 0) {\n          cachedObserver.unobserve(entry.target)\n          listeners.delete(entry.target)\n          cb()\n        }\n      })\n    },\n    { rootMargin: '200px' }\n  ))\n}\n\nconst listenToIntersections = (el: Element, cb: () => void) => {\n  const observer = getObserver()\n  if (!observer) {\n    return () => {}\n  }\n\n  observer.observe(el)\n  listeners.set(el, cb)\n  return () => {\n    try {\n      observer.unobserve(el)\n    } catch (err) {\n      console.error(err)\n    }\n    listeners.delete(el)\n  }\n}\n\nfunction prefetch(\n  router: NextRouter,\n  href: string,\n  as: string,\n  options?: PrefetchOptions\n): void {\n  if (typeof window === 'undefined') return\n  if (!isLocalURL(href)) return\n  // Prefetch the JSON page if asked (only in the client)\n  // We need to handle a prefetch error here since we may be\n  // loading with priority which can reject but we don't\n  // want to force navigation since this is only a prefetch\n  router.prefetch(href, as, options).catch((err) => {\n    if (process.env.NODE_ENV !== 'production') {\n      // rethrow to show invalid URL errors\n      throw err\n    }\n  })\n  // Join on an invalid URI character\n  prefetched[href + '%' + as] = true\n}\n\nfunction isModifiedEvent(event: React.MouseEvent) {\n  const { target } = event.currentTarget as HTMLAnchorElement\n  return (\n    (target && target !== '_self') ||\n    event.metaKey ||\n    event.ctrlKey ||\n    event.shiftKey ||\n    event.altKey || // triggers resource download\n    (event.nativeEvent && event.nativeEvent.which === 2)\n  )\n}\n\nfunction linkClicked(\n  e: React.MouseEvent,\n  router: NextRouter,\n  href: string,\n  as: string,\n  replace?: boolean,\n  shallow?: boolean,\n  scroll?: boolean\n): void {\n  const { nodeName } = e.currentTarget\n\n  if (nodeName === 'A' && (isModifiedEvent(e) || !isLocalURL(href))) {\n    // ignore click for browser’s default behavior\n    return\n  }\n\n  e.preventDefault()\n\n  //  avoid scroll for urls with anchor refs\n  if (scroll == null) {\n    scroll = as.indexOf('#') < 0\n  }\n\n  // replace state instead of push if prop is present\n  router[replace ? 'replace' : 'push'](href, as, { shallow }).then(\n    (success: boolean) => {\n      if (!success) return\n      if (scroll) {\n        window.scrollTo(0, 0)\n        document.body.focus()\n      }\n    }\n  )\n}\n\nfunction Link(props: React.PropsWithChildren<LinkProps>) {\n  if (process.env.NODE_ENV !== 'production') {\n    function createPropError(args: {\n      key: string\n      expected: string\n      actual: string\n    }) {\n      return new Error(\n        `Failed prop type: The prop \\`${args.key}\\` expects a ${args.expected} in \\`<Link>\\`, but got \\`${args.actual}\\` instead.` +\n          (typeof window !== 'undefined'\n            ? \"\\nOpen your browser's console to view the Component stack trace.\"\n            : '')\n      )\n    }\n\n    // TypeScript trick for type-guarding:\n    const requiredPropsGuard: Record<LinkPropsRequired, true> = {\n      href: true,\n    } as const\n    const requiredProps: LinkPropsRequired[] = Object.keys(\n      requiredPropsGuard\n    ) as LinkPropsRequired[]\n    requiredProps.forEach((key: LinkPropsRequired) => {\n      if (key === 'href') {\n        if (\n          props[key] == null ||\n          (typeof props[key] !== 'string' && typeof props[key] !== 'object')\n        ) {\n          throw createPropError({\n            key,\n            expected: '`string` or `object`',\n            actual: props[key] === null ? 'null' : typeof props[key],\n          })\n        }\n      } else {\n        // TypeScript trick for type-guarding:\n        // eslint-disable-next-line @typescript-eslint/no-unused-vars\n        const _: never = key\n      }\n    })\n\n    // TypeScript trick for type-guarding:\n    const optionalPropsGuard: Record<LinkPropsOptional, true> = {\n      as: true,\n      replace: true,\n      scroll: true,\n      shallow: true,\n      passHref: true,\n      prefetch: true,\n    } as const\n    const optionalProps: LinkPropsOptional[] = Object.keys(\n      optionalPropsGuard\n    ) as LinkPropsOptional[]\n    optionalProps.forEach((key: LinkPropsOptional) => {\n      if (key === 'as') {\n        if (\n          props[key] &&\n          typeof props[key] !== 'string' &&\n          typeof props[key] !== 'object'\n        ) {\n          throw createPropError({\n            key,\n            expected: '`string` or `object`',\n            actual: typeof props[key],\n          })\n        }\n      } else if (\n        key === 'replace' ||\n        key === 'scroll' ||\n        key === 'shallow' ||\n        key === 'passHref' ||\n        key === 'prefetch'\n      ) {\n        if (props[key] != null && typeof props[key] !== 'boolean') {\n          throw createPropError({\n            key,\n            expected: '`boolean`',\n            actual: typeof props[key],\n          })\n        }\n      } else {\n        // TypeScript trick for type-guarding:\n        // eslint-disable-next-line @typescript-eslint/no-unused-vars\n        const _: never = key\n      }\n    })\n\n    // This hook is in a conditional but that is ok because `process.env.NODE_ENV` never changes\n    // eslint-disable-next-line react-hooks/rules-of-hooks\n    const hasWarned = React.useRef(false)\n    if (props.prefetch && !hasWarned.current) {\n      hasWarned.current = true\n      console.warn(\n        'Next.js auto-prefetches automatically based on viewport. The prefetch attribute is no longer needed. More: https://err.sh/vercel/next.js/prefetch-true-deprecated'\n      )\n    }\n  }\n  const p = props.prefetch !== false\n\n  const [childElm, setChildElm] = React.useState<Element>()\n\n  const router = useRouter()\n  const pathname = (router && router.pathname) || '/'\n\n  const { href, as } = React.useMemo(() => {\n    const resolvedHref = resolveHref(pathname, props.href)\n    return {\n      href: resolvedHref,\n      as: props.as ? resolveHref(pathname, props.as) : resolvedHref,\n    }\n  }, [pathname, props.href, props.as])\n\n  React.useEffect(() => {\n    if (\n      p &&\n      IntersectionObserver &&\n      childElm &&\n      childElm.tagName &&\n      isLocalURL(href)\n    ) {\n      // Join on an invalid URI character\n      const isPrefetched = prefetched[href + '%' + as]\n      if (!isPrefetched) {\n        return listenToIntersections(childElm, () => {\n          prefetch(router, href, as)\n        })\n      }\n    }\n  }, [p, childElm, href, as, router])\n\n  let { children, replace, shallow, scroll } = props\n  // Deprecated. Warning shown by propType check. If the children provided is a string (<Link>example</Link>) we wrap it in an <a> tag\n  if (typeof children === 'string') {\n    children = <a>{children}</a>\n  }\n\n  // This will return the first child, if multiple are provided it will throw an error\n  const child: any = Children.only(children)\n  const childProps: {\n    onMouseEnter?: React.MouseEventHandler\n    onClick: React.MouseEventHandler\n    href?: string\n    ref?: any\n  } = {\n    ref: (el: any) => {\n      if (el) setChildElm(el)\n\n      if (child && typeof child === 'object' && child.ref) {\n        if (typeof child.ref === 'function') child.ref(el)\n        else if (typeof child.ref === 'object') {\n          child.ref.current = el\n        }\n      }\n    },\n    onClick: (e: React.MouseEvent) => {\n      if (child.props && typeof child.props.onClick === 'function') {\n        child.props.onClick(e)\n      }\n      if (!e.defaultPrevented) {\n        linkClicked(e, router, href, as, replace, shallow, scroll)\n      }\n    },\n  }\n\n  if (p) {\n    childProps.onMouseEnter = (e: React.MouseEvent) => {\n      if (!isLocalURL(href)) return\n      if (child.props && typeof child.props.onMouseEnter === 'function') {\n        child.props.onMouseEnter(e)\n      }\n      prefetch(router, href, as, { priority: true })\n    }\n  }\n\n  // If child is an <a> tag and doesn't have a href attribute, or if the 'passHref' property is\n  // defined, we specify the current 'href', so that repetition is not needed by the user\n  if (props.passHref || (child.type === 'a' && !('href' in child.props))) {\n    childProps.href = addBasePath(as)\n  }\n\n  return React.cloneElement(child, childProps)\n}\n\nexport default Link\n"]},"metadata":{},"sourceType":"script"}