@httpx/stable-hash

Create keys or hashes from javascript values, useful for memoization or cache key generation.

Install

$ npm install @httpx/stable-hash
$ yarn add @httpx/stable-hash
$ pnpm add @httpx/stable-hash

Features

• 👉  Works with plain objects, dates, bigint, number, null, undefined and arrays.
• 🦄  Insensitive to object keys or array parameters order.
• 🙏  Properly error if it encounters an unsupported datatype.
• 📐  Lightweight (starts at ~500B).
• 🛡️  Tested on node 18-22, browser, cloudflare workers and runtime/edge.
• 🗝️  Available in ESM and CJS formats.

Documentation

👉 Official website or Github Readme

Usage

• [x] createStableKey - Create a stable key from a value as a string (result object)
• [x] createStableKeyOrThrow - Create a stable key from value a string (throws).
• [x] createStableHash - Create a stable hash from a javascript object as a SHA-256/hexa (result object)
• [x] createStableHashOrThrow - Create a stable hash from a javascript object as a SHA-256/hexa (throws)

createStableKey

import { createStableKey } from '@httpx/stable-hash'

const params = {
  key8: 'a string',
  key1: 1,
  key3: true,
  key2: [3, 2, 1],
  key7: {
    key2: true,
    key1: new Date('2025-02-11T08:58:32.075Z'),
  },
};

const result = createStableKey(params);

if (!result.success) {
  throw result.error; // TypeError
}

const key = result.key;

// Key contains a json comptatible string with object keys sorted.
// By default it will sort arrays if they contains only strings or numbers
// including bigints.

// "{"key1":1,"key2":[1,2,3],"key3":true,"key7":{"key1":"2025-02-11T08:58:32.075Z","key2":true},"key8":"a string"}"

createStableKeyOrThrow

import { createStableKeyOrThrow } from '@httpx/stable-hash'

const params = {
  key8: 'a string',
  key1: 1,
  key3: true,
  key2: [3, 2, 1],
  key7: {
    key2: true,
    key1: new Date('2025-02-11T08:58:32.075Z'),
  },
};

const key = createStableKeyOrThrow(params);

// Key contains a json comptatible string with object keys sorted.
// By default it will sort arrays if they contains only strings or numbers
// including bigints.

// "{"key1":1,"key2":[1,2,3],"key3":true,"key7":{"key1":"2025-02-11T08:58:32.075Z","key2":true},"key8":"a string"}"

createStableHash

import { createStableHash } from '@httpx/stable-hash';

const value = {
  key8: 'a string',
  key1: 1,
  key3: true,
  key2: [3, 2, 1],
  key7: {
    key2: true,
    key1: new Date('2025-02-11T08:58:32.075Z'),
  },
};

const result = await createStableHash(value, {
  // By default SHA-256 is used (SHA-512 available)
  algorithm: 'SHA-256',
  // By default the hash is encoded in hexadecimal
  encoding: 'hexa',
});
if (!result.success) {
  throw result.error;
}
const hash = result.hash;
// -> 'fb17a6300efcf62ae80708e2a672aee581b7f0dd7c6a9a7a748218846c679394'

createStableHashOrThrow

import { createStableHashOrThrow } from '@httpx/stable-hash';

const params = {
  key8: 'a string',
  key1: 1,
  key3: true,
  key2: [3, 2, 1],
  key7: {
    key2: true,
    key1: new Date('2025-02-11T08:58:32.075Z'),
  },
};

try {
  const hash = await createStableHashOrThrow(params, {
    // By default SHA-256 is used (SHA-512 available)
    algorithm: 'SHA-256',
    // By default the hash is encoded in hexadecimal
    encoding: 'hexa',
  });
  // -> 'fb17a6300efcf62ae80708e2a672aee581b7f0dd7c6a9a7a748218846c679394'
} catch (e) {
  // TypeError in case of an unserializable data type
}

Alternatives

• [x] stable-hash. Fastest alternative. Might swallow errors though.

Benchmarks

Performance is monitored with codspeed.io.

See bench for details.

Bundle size

Bundle size is tracked by a size-limit configuration

Scenario	Size with deps (compressed)
`import { createStableKeyOrThrow } from '@httpx/stable-hash'	~ 480B
`import { createStableKey } from '@httpx/stable-hash'	~ 520B
`import { createStableHashOrThrow } from '@httpx/stable-hash'	~ 650B
`import { createStableHash } from '@httpx/stable-hash'	~ 695B

Compatibility

Level	CI	Description
Node	✅	CI for 20.x & 22.x.
Browser	✅	Tested with latest chrome (vitest/playwright)
Browserslist	✅	> 95% on 01/2025. defaults, chrome >= 96, firefox >= 105, edge >= 113, safari >= 15, ios >= 15, opera >= 103, not dead
Edge	✅	Ensured on CI with @vercel/edge-runtime.
Cloudflare	✅	Ensured with @cloudflare/vitest-pool-workers (see wrangler.toml
Typescript	✅	TS 5.0 + / are-the-type-wrong checks on CI.
ES2022	✅	Dist files checked with es-check
Performance	✅	Monitored with with codspeed.io

For older browsers: most frontend frameworks can transpile the library (ie: nextjs...)

Benchmarks

Performance is continuously monitored thanks to codspeed.io.

 RUN  v3.0.5 /home/sebastien/github/httpx/packages/stable-hash


 ✓ bench/compare.bench.ts > Comparison 6441ms
     name                                       hz     min     max    mean     p75     p99    p995    p999     rme  samples
   · @httpx/stable-hash                 294,773.22  0.0030  0.5363  0.0034  0.0032  0.0071  0.0094  0.0151  ±0.37%   147387   slowest
   · stable-hash                     13,291,407.61  0.0001  0.0766  0.0001  0.0001  0.0001  0.0001  0.0003  ±0.06%  6645705   fastest
   · @tanstack/query-core (hashKey)     295,851.66  0.0031  0.4376  0.0034  0.0033  0.0042  0.0059  0.0076  ±0.50%   147926

 ✓ bench/create-stable-hash.bench.ts > createStableHashOrThrow 1228ms
     name                                                  hz     min     max    mean     p75     p99    p995    p999     rme  samples
   · createStableHashOrThrow with array sorting     29,048.08  0.0263  0.2879  0.0344  0.0336  0.0729  0.1158  0.1718  ±0.49%    14525
   · createStableHashOrThrow without array sorting  32,139.11  0.0245  0.9538  0.0311  0.0307  0.0459  0.0712  0.1496  ±0.55%    16070   fastest

 ✓ bench/create-stable-key.bench.ts > createStableKeyOrThrow 1403ms
     name                                                  hz     min     max    mean     p75     p99    p995    p999     rme  samples
   · createStableKeyOrThrow with array sorting     203,266.13  0.0044  0.4635  0.0049  0.0048  0.0087  0.0091  0.0146  ±0.37%   101639
   · createStableKeyOrThrow without array sorting  283,858.83  0.0031  0.8852  0.0035  0.0034  0.0073  0.0095  0.0149  ±0.46%   141930   fastest

 BENCH  Summary

  stable-hash - bench/compare.bench.ts > Comparison
    44.93x faster than @tanstack/query-core (hashKey)
    45.09x faster than @httpx/stable-hash

  createStableHashOrThrow without array sorting - bench/create-stable-hash.bench.ts > createStableHashOrThrow
    1.11x faster than createStableHashOrThrow with array sorting

  createStableKeyOrThrow without array sorting - bench/create-stable-key.bench.ts > createStableKeyOrThrow
    1.40x faster than createStableKeyOrThrow with array sorting

See benchmark file for details.

Contributors

Contributions are warmly appreciated. Have a look to the CONTRIBUTING document.

Sponsors

If my OSS work brightens your day, let's take it to new heights together! Sponsor, coffee, or star – any gesture of support fuels my passion to improve. Thanks for being awesome! 🙏❤️

Special thanks to

JetBrains	Embie.be

License

MIT © Sébastien Vanvelthem and contributors.