interface PageViewEvent {
    type: 'pageview';
    url: string;
}
interface CustomEvent {
    type: 'event';
    url: string;
}
type BeforeSendEvent = PageViewEvent | CustomEvent;
type Mode = 'auto' | 'development' | 'production';
type AllowedPropertyValues = string | number | boolean | null | undefined;
type BeforeSend = (event: BeforeSendEvent) => BeforeSendEvent | null;
interface AnalyticsProps {
    beforeSend?: BeforeSend;
    debug?: boolean;
    mode?: Mode;
    scriptSrc?: string;
    endpoint?: string;
    dsn?: string;
}
declare global {
    interface Window {
        va?: (event: 'beforeSend' | 'event' | 'pageview', properties?: unknown) => void;
        vaq?: [string, unknown?][];
        vai?: boolean;
        vam?: Mode;
        /** used by Astro component only */
        webAnalyticsBeforeSend?: BeforeSend;
    }
}
type PlainFlags = Record<string, unknown>;
type FlagsDataInput = (string | PlainFlags)[] | PlainFlags;

/**
 * Tracks a custom event. Please refer to the [documentation](https://vercel.com/docs/concepts/analytics/custom-events) for more information on custom events.
 * @param name - The name of the event.
 * * Examples: `Purchase`, `Click Button`, or `Play Video`.
 * @param [properties] - Additional properties of the event. Nested objects are not supported. Allowed values are `string`, `number`, `boolean`, and `null`.
 */
declare function track(name: string, properties?: Record<string, AllowedPropertyValues>, options?: {
    flags?: FlagsDataInput;
}): void;

/**
 * Injects the Vercel Web Analytics script into the page head and starts tracking page views. Read more in our [documentation](https://vercel.com/docs/concepts/analytics/package).
 * @param [props] - Analytics options.
 * @param [props.mode] - The mode to use for the analytics script. Defaults to `auto`.
 *  - `auto` - Automatically detect the environment.  Uses `production` if the environment cannot be determined.
 *  - `production` - Always use the production script. (Sends events to the server)
 *  - `development` - Always use the development script. (Logs events to the console)
 * @param [props.debug] - Whether to enable debug logging in development. Defaults to `true`.
 * @param [props.beforeSend] - A middleware function to modify events before they are sent. Should return the event object or `null` to cancel the event.
 * @example
 * ```js
 * import { Analytics } from '@vercel/analytics/react';
 *
 * export default function App() {
 *  return (
 *   <div>
 *    <Analytics />
 *    <h1>My App</h1>
 *  </div>
 * );
 * }
 * ```
 */
declare function Analytics(props: AnalyticsProps & {
    framework?: string;
    route?: string | null;
    path?: string | null;
    basePath?: string;
}): null;

export { Analytics, type AnalyticsProps, type BeforeSend, type BeforeSendEvent, track };