simple-str-hash

Lightweight, dependency-free string hashing utilities for Node.js.

Implements several classic non-cryptographic hash algorithms (FNV, DJB2, SDBM, CRC32, Java hashCode) plus small helpers for IDs, slugs and colors.

Install

npm install simple-str-hash

Usage

const hash = require('simple-str-hash');

console.log(hash.fnv1a('hello world')); // 3582672807
console.log(hash.djb2('hello world')); // 894552257
console.log(hash.crc32('hello world')); // 222957957
console.log(hash.hash('hello world')); // default: FNV-1a

console.log(hash.toHex('hello world')); // 'd58b3fa7'
console.log(hash.toColor('hello world')); // '#...' deterministic color
console.log(hash.shortId('hello world')); // short URL-safe id

API

Hashes

• hash(str) — FNV-1a hash (default)
• fnv1a(str) — FNV-1a 32-bit hash
• fnv1(str) — FNV-1 32-bit hash
• djb2(str) — DJB2 32-bit hash
• sdbm(str) — SDBM 32-bit hash
• crc32(str) — CRC32 (IEEE) checksum
• javaHashCode(str) — Java-style String.hashCode()

Helpers

• toHex(str, [fn]) — hash as zero-padded hex string
• toColor(str) — deterministic #RRGGBB color
• shortId(str, [len], [alphabet]) — short id from a hash
• randomString(len, [prefix], [alphabet]) — random string
• slugify(str) — URL-friendly slug
• truncate(str, [max], [ellipsis]) — truncate with ellipsis
• hashPassword(pw, [salt]) / verifyPassword(pw, hash, salt)

License

MIT