> ## Documentation Index > Fetch the complete documentation index at: https://veryfront.com/docs/llms.txt > Use this file to discover all available pages before exploring further. # veryfront/utils > Runtime detection, logging, constants, hashing, and feature flags. ## Import ```ts theme={null} import { __registerTraceContextGetter, computeCodeHash, computeHash, computeIntegrity, createLockfileManager, createRunUserLogger, } from "veryfront/utils"; ``` ## Examples ### Structured logging ```ts theme={null} import { serverLogger } from "veryfront/utils"; serverLogger.info("Booting server", { project_id: "proj_123" }); ``` ## Exports ### Components | Name | Description | Source | | ------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | --------------------------------------------------------------------------------------------------- | | `BREAKPOINT_LG` | Shared breakpoint lg value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/html.ts#L11) | | `BREAKPOINT_MD` | Shared breakpoint md value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/html.ts#L9) | | `BREAKPOINT_SM` | Shared breakpoint sm value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/html.ts#L7) | | `BREAKPOINT_XL` | Shared breakpoint xl value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/html.ts#L13) | | `BYTES_PER_KB` | Shared bytes per kb value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/network.ts#L8) | | `DEFAULT_ALLOWED_CDN_HOSTS` | Default value for allowed cdn hosts. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/cdn.ts#L77) | | `DEFAULT_BUILD_CONCURRENCY` | Default value for build concurrency. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/build.ts#L2) | | `DEFAULT_DASHBOARD_PORT` | Default port for development dashboard (matches veryfront.config.ts default) | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/server.ts#L11) | | `DEFAULT_LRU_MAX_ENTRIES` | Default value for lru max entries. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/cache.ts#L45) | | `DEV_SERVER_ENDPOINTS` | Shared dev server endpoints value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/server.ts#L135) | | `FORBIDDEN_PATH_PATTERNS` | Shared forbidden path patterns value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/security.ts#L4) | | `HASH_SEED_DJB2` | Shared hash seed djb2 value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/hash.ts#L2) | | `HASH_SEED_FNV1A` | Shared hash seed fnv1 a value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/hash.ts#L4) | | `HMR_CLIENT_RELOAD_DELAY_MS` | Shared HMR client reload delay ms value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/hmr.ts#L8) | | `HMR_CLOSE_MESSAGE_TOO_LARGE` | Shared HMR close message too large value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/hmr.ts#L17) | | `HMR_CLOSE_NORMAL` | Shared HMR close normal value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/hmr.ts#L13) | | `HMR_CLOSE_RATE_LIMIT` | Shared HMR close rate limit value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/hmr.ts#L15) | | `HMR_MAX_MESSAGE_SIZE_BYTES` | Shared HMR max message size bytes value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/hmr.ts#L4) | | `HMR_MAX_MESSAGES_PER_MINUTE` | Shared HMR max messages per minute value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/hmr.ts#L6) | | `HMR_RATE_LIMIT_WINDOW_MS` | Shared HMR rate limit window ms value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/hmr.ts#L11) | | `HTTP_BAD_REQUEST` | Shared HTTP bad request value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/http.ts#L35) | | `HTTP_CONTENT_TYPE_IMAGE_GIF` | Shared HTTP content type image gif value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/http.ts#L87) | | `HTTP_CONTENT_TYPE_IMAGE_ICO` | Shared HTTP content type image ico value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/http.ts#L89) | | `HTTP_CONTENT_TYPE_IMAGE_JPEG` | Shared HTTP content type image jpeg value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/http.ts#L80) | | `HTTP_CONTENT_TYPE_IMAGE_PNG` | Shared HTTP content type image png value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/http.ts#L78) | | `HTTP_CONTENT_TYPE_IMAGE_SVG` | Shared HTTP content type image svg value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/http.ts#L85) | | `HTTP_CONTENT_TYPE_IMAGE_WEBP` | Shared HTTP content type image webp value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/http.ts#L82) | | `HTTP_CONTENT_TYPES` | Shared HTTP content types value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/http.ts#L69) | | `HTTP_MODULE_FETCH_TIMEOUT_MS` | Shared HTTP module fetch timeout ms value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/http.ts#L6) | | `HTTP_NETWORK_CONNECT_TIMEOUT` | Shared HTTP network connect timeout value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/http.ts#L57) | | `HTTP_NOT_FOUND` | Shared HTTP not found value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/http.ts#L39) | | `HTTP_NOT_IMPLEMENTED` | Shared HTTP not implemented value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/http.ts#L51) | | `HTTP_OK` | Shared HTTP ok value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/http.ts#L27) | | `HTTP_REDIRECT_FOUND` | Shared HTTP redirect found value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/http.ts#L31) | | `HTTP_SERVER_ERROR` | Shared HTTP server error value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/http.ts#L49) | | `HTTP_STATUS_CLIENT_ERROR_MIN` | Shared HTTP status client error min value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/http.ts#L64) | | `HTTP_STATUS_REDIRECT_MIN` | Shared HTTP status redirect min value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/http.ts#L62) | | `HTTP_STATUS_SERVER_ERROR_MIN` | Shared HTTP status server error min value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/http.ts#L66) | | `HTTP_STATUS_SUCCESS_MIN` | Shared HTTP status success min value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/http.ts#L60) | | `HTTP_UNAVAILABLE` | Shared HTTP unavailable value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/http.ts#L54) | | `IMAGE_OPTIMIZATION` | Shared image optimization value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/build.ts#L5) | | `MAX_BATCH_SIZE` | \*\*\*\*\*\* Batch limits \*\*\*\*\*\*\* | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/limits.ts#L31) | | `MAX_PATH_LENGTH` | Maximum value for path length. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/security.ts#L16) | | `MAX_PATH_TRAVERSAL_DEPTH` | Maximum value for path traversal depth. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/security.ts#L2) | | `MS_PER_SECOND` | Shared ms per second value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/cache.ts#L5) | | `PREFETCH_DEFAULT_DELAY_MS` | Shared prefetch default delay ms value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/http.ts#L24) | | `PREFETCH_DEFAULT_TIMEOUT_MS` | Shared prefetch default timeout ms value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/http.ts#L22) | | `PREFETCH_MAX_SIZE_BYTES` | Shared prefetch max size bytes value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/http.ts#L20) | | `REACT_DEFAULT_VERSION` | Shared React default version value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/cdn.ts#L12) | | `RESPONSIVE_IMAGE_WIDTH_LG` | Shared responsive image width lg value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/network.ts#L19) | | `RESPONSIVE_IMAGE_WIDTHS` | Shared responsive image widths value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/network.ts#L22) | | `RSC_MANIFEST_CACHE_TTL_MS` | Shared RSC manifest cache ttl ms value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/cache.ts#L85) | | `TSX_LAYOUT_MAX_ENTRIES` | Shared TSX layout max entries value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/cache.ts#L57) | | `TSX_LAYOUT_PER_PROJECT_MAX_ENTRIES` | Per-project cap for the TSX layout component cache. Prevents a single noisy tenant from evicting every other project's cached layouts. Defaults to ceil(TSX\_LAYOUT\_MAX\_ENTRIES / 10) so no one project consumes more than \~10 % of the global budget. Set via TSX\_LAYOUT\_PER\_PROJECT\_MAX\_ENTRIES env var. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/cache.ts#L67) | | `VERSION` | Shared version value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/version-constant.ts#L4) | | `Z_INDEX_DEV_INDICATOR` | Shared z index dev indicator value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/html.ts#L2) | | `Z_INDEX_ERROR_OVERLAY` | Shared z index error overlay value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/html.ts#L4) | ### Functions | Name | Description | Source | | ------------------------------ | ---------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------- | | `__registerTraceContextGetter` | Register the trace context getter. Called by trace-bridge.ts after OTLP initialization. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/logger/logger.ts#L488) | | `computeCodeHash` | Compute code hash. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/hash-utils.ts#L22) | | `computeHash` | Compute hash. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/hash-utils.ts#L8) | | `computeIntegrity` | Compute integrity. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/import-lockfile.ts#L28) | | `createLockfileManager` | Create lockfile manager. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/import-lockfile.ts#L76) | | `createRunUserLogger` | Create run user logger. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/logger/logger.ts#L618) | | `endRequest` | Request payload for end. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/perf-timer.ts#L73) | | `fnv1aHash` | FNV-1a hash for strings - returns hex string | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/hash-utils.ts#L50) | | `getBundleManifestStore` | Return bundle manifest store. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/bundle-manifest.ts#L160) | | `getDenoStdNodeBase` | Return Deno std node base. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/cdn.ts#L82) | | `getReactImportMap` | Return React import map. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/constants/cdn.ts#L46) | | `hasBunRuntime` | Check whether Bun runtime is present. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/runtime-guards.ts#L45) | | `hasDenoRuntime` | Check whether Deno runtime is present. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/runtime-guards.ts#L31) | | `hasNodeProcess` | Check whether node process is present. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/runtime-guards.ts#L38) | | `isCompiledBinary` | Detect if the code is running in a compiled Deno binary | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/platform.ts#L12) | | `isEnabled` | Check whether request performance timing is enabled. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/perf-timer.ts#L143) | | `isRSCEnabled` | Check whether RSC is enabled. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/feature-flags.ts#L4) | | `memoize` | Memoize. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/memoize.ts#L79) | | `memoizeAsync` | Memoize async. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/memoize.ts#L71) | | `memoizeHash` | FNV-1a hash algorithm for fast cache key generation. 10-15x faster than JSON.stringify() and uses 70-80% less memory. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/memoize.ts#L90) | | `normalizePath` | Normalizes path. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/path-utils.ts#L11) | | `parallelMap` | Run parallel map. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/parallel.ts#L43) | | `refreshLoggerConfig` | Re-read logger configuration from environment variables. Call after loading .env files so the logger picks up any overrides. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/logger/logger.ts#L166) | | `registerTraceContextGetter` | Register the trace context getter. Called by trace-bridge.ts after OTLP initialization. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/logger/logger.ts#L488) | | `runWithRequestContextAsync` | Run with request context async. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/logger/request-context.ts#L39) | | `shortHash` | Create short hash. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/hash-utils.ts#L44) | | `simpleHash` | Create simple hash. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/hash-utils.ts#L27) | | `startRequest` | Request payload for start. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/perf-timer.ts#L36) | | `startTimer` | Starts timer. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/perf-timer.ts#L44) | | `timeAsync` | Time async. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/perf-timer.ts#L57) | ### Classes | Name | Description | Source | | ----------- | --------------------- | --------------------------------------------------------------------------------------- | | `MemoCache` | Implement memo cache. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/memoize.ts#L5) | ### Types | Name | Description | Source | | ------------------- | ------------------------------------------------ | ------------------------------------------------------------------------------------------------------- | | `BundleCode` | Public API contract for bundle code. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/bundle-manifest.ts#L23) | | `BundleMetadata` | Public API contract for bundle metadata. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/bundle-manifest.ts#L6) | | `GlobalWithBun` | Public API contract for global with Bun. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/runtime-guards.ts#L20) | | `GlobalWithDeno` | Public API contract for global with Deno. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/runtime-guards.ts#L2) | | `GlobalWithProcess` | Public API contract for global with process. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/runtime-guards.ts#L11) | | `HashBundleCode` | Source bundle content used for hash computation. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/hash-utils.ts#L15) | | `LockfileManager` | Public API contract for lockfile manager. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/import-lockfile.ts#L39) | | `Logger` | Public API contract for logger. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/logger/logger.ts#L81) | | `RequestContext` | Context for request. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/logger/request-context.ts#L14) | ### Constants | Name | Description | Source | | ---------------- | ----------------------------- | ----------------------------------------------------------------------------------------------- | | `agentLogger` | Shared agent logger value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/logger/logger.ts#L579) | | `bundlerLogger` | Shared bundler logger value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/logger/logger.ts#L577) | | `logger` | Shared logger value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/logger/logger.ts#L582) | | `rendererLogger` | Shared renderer logger value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/logger/logger.ts#L575) | | `serverLogger` | Shared server logger value. | [source](https://github.com/veryfront/veryfront-code/blob/main/src/utils/logger/logger.ts#L573) |