/**
 * Runtime detection helpers for the SSR module.
 *
 * Detects whether the current runtime is Bun, Deno, Node.js, a browser,
 * or a Web-Worker / edge runtime (Cloudflare Workers / `workerd`).
 * Detection is feature-based and never throws; calling these helpers is
 * safe in any environment that provides `globalThis`.
 *
 * @module bquery/ssr
 */
/**
 * Identifier for a recognised JavaScript runtime.
 */
export type SSRRuntime = 'bun' | 'deno' | 'node' | 'browser' | 'workerd' | 'unknown';
/**
 * Detects the current runtime via feature checks on `globalThis`.
 * Order matters: Bun and Deno expose Node compatibility shims, so they are
 * checked first.
 *
 * @returns The detected runtime identifier, or `'unknown'` if none match.
 *
 * @example
 * ```ts
 * import { detectRuntime } from '@bquery/bquery/ssr';
 *
 * if (detectRuntime() === 'deno') {
 *   // Deno-specific behaviour
 * }
 * ```
 */
export declare const detectRuntime: () => SSRRuntime;
/**
 * Returns `true` when called inside a server-side runtime (Bun, Deno, Node,
 * Cloudflare Workers / `workerd`).
 */
export declare const isServerRuntime: () => boolean;
/**
 * Returns `true` when called inside a browser-like runtime (full DOM available).
 */
export declare const isBrowserRuntime: () => boolean;
/**
 * Lightweight feature-detection report for runtime capabilities relevant to SSR.
 */
export interface SSRRuntimeFeatures {
    /** Whether `Request`/`Response`/`fetch` are available on `globalThis`. */
    fetchApi: boolean;
    /** Whether `ReadableStream` is available on `globalThis`. */
    webStreams: boolean;
    /** Whether `TextEncoder` is available on `globalThis`. */
    textEncoder: boolean;
    /** Whether `crypto.subtle` is available (used for ETag hashing). */
    subtleCrypto: boolean;
    /** Whether `crypto.randomUUID()` is available. */
    randomUuid: boolean;
    /** Whether the global `DOMParser` is available. */
    domParser: boolean;
}
/**
 * Returns a feature-detection report for the current runtime. All checks are
 * non-throwing; missing globals yield `false`.
 */
export declare const getSSRRuntimeFeatures: () => SSRRuntimeFeatures;
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