import { Context, ILogLevel, ILogtailLog, ILogtailOptions } from "@logtail/types";
import { Base } from "@logtail/core";
export declare class Browser extends Base {
    constructor(sourceToken: string, options?: Partial<ILogtailOptions>);
    /**
     * Override `Base` log to add browser-specific context
     *
     * @param message: string - Log message
     * @param level (LogLevel) - Level to log at (debug|info|warn|error)
     * @param context: (Context) - Log context for passing structured data
     * @returns Promise<ILogtailLog> after syncing
     */
    log<TContext extends Context>(message: string, level?: ILogLevel, context?: TContext): Promise<ILogtailLog & TContext>;
    protected getCurrentContext(): Context;
    private configureFlushOnPageLeave;
}