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comprs

From brotli-wasm

brotli-wasm compiles the Rust brotli crates to WebAssembly. comprs uses libbrotli, the C library that browsers and node:zlib use, in a WebAssembly build that loads itself when it is imported, and the native addon in Node.js, Deno and Bun.

import brotliPromise from 'brotli-wasm';
const brotli = await brotliPromise;
const compressed = brotli.compress(data, { quality: 11 });
const restored = brotli.decompress(compressed);
import { compressSync, decompressSync } from '@derodero24/comprs/next';
const compressed = compressSync(data, { format: 'brotli', level: 11 });
const restored = decompressSync(compressed, { format: 'brotli' });
  • Loading. There is no promise to await: the entry module instantiates the WebAssembly module with top-level await when it is imported. See Browsers for the bundler setup.
  • Streams. Replace brotli-wasm’s CompressStream and DecompressStream with new CompressionStream('brotli') and new DecompressionStream('brotli') of the unified API, which work with pipeThrough().
  • Quality. comprs compresses at quality 6 by default. Pass level for another quality, from 0 to 11.
  • Size. comprs’s full WebAssembly module holds zstd, gzip and LZ4 as well: 568 KB with gzip. If brotli is all you need, import @derodero24/comprs/next/brotli, which loads a module with brotli alone: 337 KB with gzip (see Browsers).
  • Dictionaries. comprs takes a custom brotli dictionary (see Dictionaries).