# node:zlib # `node:zlib` ## Import ```js import zlib from "nstdlib/zlib"; ``` > [!NOTE] > Only the API surface is available. No compression binding, so every stream and one-shot throws `ERR_NSTDLIB_NO_BINDING`. The 154 exports and all of `constants` and `codes` are real and compared against the host builtin. ## Runtime support | Where it runs | Status | Export coverage | Details | | ------------- | ------ | --------------- | ------- | | **nstd** | ⚠️ some support | – | 3/64 of Node's own eligible tests pass under nstd. | | **Browser** | ❔ not tested | 100% of Node.js | It imports with the small process shim. 154/154 Node.js exports are available. No module-specific behavior test ran. | | **Node.js (host)** | ⚠️ some support | 100% of Node.js | 154/154 exports. | ## Exports (154 of 154) Each cell shows what happens when code reads an export: - ✅ Available through every import style. A named error also counts. - ⚠️ Available through only some import styles. - ❔ The export exists but has no value. - ❌ The export does not exist. - – This environment was not measured.

Show all 154 exports

| Export | Node.js | nstdlib | browser | | ------ | ------- | ------- | ------- | | `BrotliCompress` | ✅ | ✅ | ✅ | | `BrotliDecompress` | ✅ | ✅ | ✅ | | `DEFLATE` | ✅ | ✅ | ✅ | | `DEFLATERAW` | ✅ | ✅ | ✅ | | `Deflate` | ✅ | ✅ | ✅ | | `DeflateRaw` | ✅ | ✅ | ✅ | | `GUNZIP` | ✅ | ✅ | ✅ | | `GZIP` | ✅ | ✅ | ✅ | | `Gunzip` | ✅ | ✅ | ✅ | | `Gzip` | ✅ | ✅ | ✅ | | `INFLATE` | ✅ | ✅ | ✅ | | `INFLATERAW` | ✅ | ✅ | ✅ | | `Inflate` | ✅ | ✅ | ✅ | | `InflateRaw` | ✅ | ✅ | ✅ | | `UNZIP` | ✅ | ✅ | ✅ | | `Unzip` | ✅ | ✅ | ✅ | | `ZLIB_VERNUM` | ✅ | ✅ | ✅ | | `ZSTD_CLEVEL_DEFAULT` | ✅ | ✅ | ✅ | | `ZSTD_COMPRESS` | ✅ | ✅ | ✅ | | `ZSTD_DECOMPRESS` | ✅ | ✅ | ✅ | | `ZSTD_btlazy2` | ✅ | ✅ | ✅ | | `ZSTD_btopt` | ✅ | ✅ | ✅ | | `ZSTD_btultra` | ✅ | ✅ | ✅ | | `ZSTD_btultra2` | ✅ | ✅ | ✅ | | `ZSTD_c_chainLog` | ✅ | ✅ | ✅ | | `ZSTD_c_checksumFlag` | ✅ | ✅ | ✅ | | `ZSTD_c_compressionLevel` | ✅ | ✅ | ✅ | | `ZSTD_c_contentSizeFlag` | ✅ | ✅ | ✅ | | `ZSTD_c_dictIDFlag` | ✅ | ✅ | ✅ | | `ZSTD_c_enableLongDistanceMatching` | ✅ | ✅ | ✅ | | `ZSTD_c_hashLog` | ✅ | ✅ | ✅ | | `ZSTD_c_jobSize` | ✅ | ✅ | ✅ | | `ZSTD_c_ldmBucketSizeLog` | ✅ | ✅ | ✅ | | `ZSTD_c_ldmHashLog` | ✅ | ✅ | ✅ | | `ZSTD_c_ldmHashRateLog` | ✅ | ✅ | ✅ | | `ZSTD_c_ldmMinMatch` | ✅ | ✅ | ✅ | | `ZSTD_c_minMatch` | ✅ | ✅ | ✅ | | `ZSTD_c_nbWorkers` | ✅ | ✅ | ✅ | | `ZSTD_c_overlapLog` | ✅ | ✅ | ✅ | | `ZSTD_c_searchLog` | ✅ | ✅ | ✅ | | `ZSTD_c_strategy` | ✅ | ✅ | ✅ | | `ZSTD_c_targetLength` | ✅ | ✅ | ✅ | | `ZSTD_c_windowLog` | ✅ | ✅ | ✅ | | `ZSTD_d_windowLogMax` | ✅ | ✅ | ✅ | | `ZSTD_dfast` | ✅ | ✅ | ✅ | | `ZSTD_e_continue` | ✅ | ✅ | ✅ | | `ZSTD_e_end` | ✅ | ✅ | ✅ | | `ZSTD_e_flush` | ✅ | ✅ | ✅ | | `ZSTD_error_GENERIC` | ✅ | ✅ | ✅ | | `ZSTD_error_checksum_wrong` | ✅ | ✅ | ✅ | | `ZSTD_error_corruption_detected` | ✅ | ✅ | ✅ | | `ZSTD_error_dictionaryCreation_failed` | ✅ | ✅ | ✅ | | `ZSTD_error_dictionary_corrupted` | ✅ | ✅ | ✅ | | `ZSTD_error_dictionary_wrong` | ✅ | ✅ | ✅ | | `ZSTD_error_dstBuffer_null` | ✅ | ✅ | ✅ | | `ZSTD_error_dstSize_tooSmall` | ✅ | ✅ | ✅ | | `ZSTD_error_frameParameter_unsupported` | ✅ | ✅ | ✅ | | `ZSTD_error_frameParameter_windowTooLarge` | ✅ | ✅ | ✅ | | `ZSTD_error_init_missing` | ✅ | ✅ | ✅ | | `ZSTD_error_literals_headerWrong` | ✅ | ✅ | ✅ | | `ZSTD_error_maxSymbolValue_tooLarge` | ✅ | ✅ | ✅ | | `ZSTD_error_maxSymbolValue_tooSmall` | ✅ | ✅ | ✅ | | `ZSTD_error_memory_allocation` | ✅ | ✅ | ✅ | | `ZSTD_error_noForwardProgress_destFull` | ✅ | ✅ | ✅ | | `ZSTD_error_noForwardProgress_inputEmpty` | ✅ | ✅ | ✅ | | `ZSTD_error_no_error` | ✅ | ✅ | ✅ | | `ZSTD_error_parameter_combination_unsupported` | ✅ | ✅ | ✅ | | `ZSTD_error_parameter_outOfBound` | ✅ | ✅ | ✅ | | `ZSTD_error_parameter_unsupported` | ✅ | ✅ | ✅ | | `ZSTD_error_prefix_unknown` | ✅ | ✅ | ✅ | | `ZSTD_error_srcSize_wrong` | ✅ | ✅ | ✅ | | `ZSTD_error_stabilityCondition_notRespected` | ✅ | ✅ | ✅ | | `ZSTD_error_stage_wrong` | ✅ | ✅ | ✅ | | `ZSTD_error_tableLog_tooLarge` | ✅ | ✅ | ✅ | | `ZSTD_error_version_unsupported` | ✅ | ✅ | ✅ | | `ZSTD_error_workSpace_tooSmall` | ✅ | ✅ | ✅ | | `ZSTD_fast` | ✅ | ✅ | ✅ | | `ZSTD_greedy` | ✅ | ✅ | ✅ | | `ZSTD_lazy` | ✅ | ✅ | ✅ | | `ZSTD_lazy2` | ✅ | ✅ | ✅ | | `Z_BEST_COMPRESSION` | ✅ | ✅ | ✅ | | `Z_BEST_SPEED` | ✅ | ✅ | ✅ | | `Z_BLOCK` | ✅ | ✅ | ✅ | | `Z_BUF_ERROR` | ✅ | ✅ | ✅ | | `Z_DATA_ERROR` | ✅ | ✅ | ✅ | | `Z_DEFAULT_CHUNK` | ✅ | ✅ | ✅ | | `Z_DEFAULT_COMPRESSION` | ✅ | ✅ | ✅ | | `Z_DEFAULT_LEVEL` | ✅ | ✅ | ✅ | | `Z_DEFAULT_MEMLEVEL` | ✅ | ✅ | ✅ | | `Z_DEFAULT_STRATEGY` | ✅ | ✅ | ✅ | | `Z_DEFAULT_WINDOWBITS` | ✅ | ✅ | ✅ | | `Z_ERRNO` | ✅ | ✅ | ✅ | | `Z_FILTERED` | ✅ | ✅ | ✅ | | `Z_FINISH` | ✅ | ✅ | ✅ | | `Z_FIXED` | ✅ | ✅ | ✅ | | `Z_FULL_FLUSH` | ✅ | ✅ | ✅ | | `Z_HUFFMAN_ONLY` | ✅ | ✅ | ✅ | | `Z_MAX_CHUNK` | ✅ | ✅ | ✅ | | `Z_MAX_LEVEL` | ✅ | ✅ | ✅ | | `Z_MAX_MEMLEVEL` | ✅ | ✅ | ✅ | | `Z_MAX_WINDOWBITS` | ✅ | ✅ | ✅ | | `Z_MEM_ERROR` | ✅ | ✅ | ✅ | | `Z_MIN_CHUNK` | ✅ | ✅ | ✅ | | `Z_MIN_LEVEL` | ✅ | ✅ | ✅ | | `Z_MIN_MEMLEVEL` | ✅ | ✅ | ✅ | | `Z_MIN_WINDOWBITS` | ✅ | ✅ | ✅ | | `Z_NEED_DICT` | ✅ | ✅ | ✅ | | `Z_NO_COMPRESSION` | ✅ | ✅ | ✅ | | `Z_NO_FLUSH` | ✅ | ✅ | ✅ | | `Z_OK` | ✅ | ✅ | ✅ | | `Z_PARTIAL_FLUSH` | ✅ | ✅ | ✅ | | `Z_RLE` | ✅ | ✅ | ✅ | | `Z_STREAM_END` | ✅ | ✅ | ✅ | | `Z_STREAM_ERROR` | ✅ | ✅ | ✅ | | `Z_SYNC_FLUSH` | ✅ | ✅ | ✅ | | `Z_VERSION_ERROR` | ✅ | ✅ | ✅ | | `ZstdCompress` | ✅ | ✅ | ✅ | | `ZstdDecompress` | ✅ | ✅ | ✅ | | `brotliCompress` | ✅ | ✅ | ✅ | | `brotliCompressSync` | ✅ | ✅ | ✅ | | `brotliDecompress` | ✅ | ✅ | ✅ | | `brotliDecompressSync` | ✅ | ✅ | ✅ | | `codes` | ✅ | ✅ | ✅ | | `constants` | ✅ | ✅ | ✅ | | `crc32` | ✅ | ✅ | ✅ | | `createBrotliCompress` | ✅ | ✅ | ✅ | | `createBrotliDecompress` | ✅ | ✅ | ✅ | | `createDeflate` | ✅ | ✅ | ✅ | | `createDeflateRaw` | ✅ | ✅ | ✅ | | `createGunzip` | ✅ | ✅ | ✅ | | `createGzip` | ✅ | ✅ | ✅ | | `createInflate` | ✅ | ✅ | ✅ | | `createInflateRaw` | ✅ | ✅ | ✅ | | `createUnzip` | ✅ | ✅ | ✅ | | `createZstdCompress` | ✅ | ✅ | ✅ | | `createZstdDecompress` | ✅ | ✅ | ✅ | | `deflate` | ✅ | ✅ | ✅ | | `deflateRaw` | ✅ | ✅ | ✅ | | `deflateRawSync` | ✅ | ✅ | ✅ | | `deflateSync` | ✅ | ✅ | ✅ | | `gunzip` | ✅ | ✅ | ✅ | | `gunzipSync` | ✅ | ✅ | ✅ | | `gzip` | ✅ | ✅ | ✅ | | `gzipSync` | ✅ | ✅ | ✅ | | `inflate` | ✅ | ✅ | ✅ | | `inflateRaw` | ✅ | ✅ | ✅ | | `inflateRawSync` | ✅ | ✅ | ✅ | | `inflateSync` | ✅ | ✅ | ✅ | | `unzip` | ✅ | ✅ | ✅ | | `unzipSync` | ✅ | ✅ | ✅ | | `zstdCompress` | ✅ | ✅ | ✅ | | `zstdCompressSync` | ✅ | ✅ | ✅ | | `zstdDecompress` | ✅ | ✅ | ✅ | | `zstdDecompressSync` | ✅ | ✅ | ✅ |