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https://github.com/unjs/ohash
Super fast hashing library based on murmurhash3 written in Vanilla JS
https://github.com/unjs/ohash
Last synced: 14 days ago
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Super fast hashing library based on murmurhash3 written in Vanilla JS
- Host: GitHub
- URL: https://github.com/unjs/ohash
- Owner: unjs
- License: mit
- Created: 2021-10-18T17:57:47.000Z (about 3 years ago)
- Default Branch: main
- Last Pushed: 2024-10-18T01:23:09.000Z (27 days ago)
- Last Synced: 2024-10-26T23:33:35.370Z (18 days ago)
- Language: JavaScript
- Homepage:
- Size: 1.59 MB
- Stars: 557
- Watchers: 5
- Forks: 11
- Open Issues: 5
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- License: LICENSE
Awesome Lists containing this project
README
# ohash
[![npm version][npm-version-src]][npm-version-href]
[![npm downloads][npm-downloads-src]][npm-downloads-href]
[![Github Actions][github-actions-src]][github-actions-href]
[![Codecov][codecov-src]][codecov-href]
[![bundle size][bundle-src]][bundle-href]
> Super fast hashing library written in Vanilla JS
## Usage
Install package:
```sh
# npm
npm install ohash
# yarn
yarn add ohash
# pnpm
pnpm install ohash
```
Import:
```js
// ESM
import { hash, objectHash, murmurHash, sha256 } from "ohash";
// CommonJS
const { hash, objectHash, murmurHash, sha256 } = require("ohash");
```
### `hash(object, options?)`
Converts object value into a string hash using `objectHash` and then applies `sha256` with Base64 encoding (trimmed by length of 10).
Usage:
```js
import { hash } from "ohash";
// "dZbtA7f0lK"
console.log(hash({ foo: "bar" }));
```
### `objectHash(object, options?)`
Converts a nest object value into a stable and safe string for hashing.
Usage:
```js
import { objectHash } from "ohash";
// "object:1:string:3:foo:string:3:bar,"
console.log(objectHash({ foo: "bar" }));
```
### `isEqual(obj1, obj2, options?)`
Compare two objects using reference equality and stable object hashing.
Usage:
```js
import { isEqual } from "ohash";
// true
console.log(isEqual({ a: 1, b: 2 }, { b: 2, a: 1 }));
```
### `diff(obj1, obj2, options?)`
Compare two objects with nested hashing. Returns an array of changes.
Returned value is an array of diff entries with `$key`, `$hash`, `$value` and `$props`. When logging, a string version of changelog is displayed.
Usage:
```js
import { diff } from "ohash";
const createObject = () => ({
foo: "bar",
nested: {
y: 123,
bar: {
baz: "123",
},
},
});
const obj1 = createObject();
const obj2 = createObject();
obj2.nested.x = 123;
delete obj2.nested.y;
obj2.nested.bar.baz = 123;
const diff = diff(obj1, obj2);
// [-] Removed nested.y
// [~] Changed nested.bar.baz from "123" to 123
// [+] Added nested.x
console.log(diff(obj1, obj2));
```
### `murmurHash(str)`
Converts input string (of any length) into a 32-bit positive integer using [MurmurHash3](https://en.wikipedia.org/wiki/MurmurHash).
Usage:
```js
import { murmurHash } from "ohash";
// "427197390"
console.log(murmurHash("Hello World"));
```
### `sha256`
Create a secure [SHA 256](https://en.wikipedia.org/wiki/SHA-2) digest from input string.
```js
import { sha256 } from "ohash";
// "a591a6d40bf420404a011733cfb7b190d62c65bf0bcda32b57b277d9ad9f146e"
console.log(sha256("Hello World"));
```
### `sha256base64`
Create a secure [SHA 256](https://en.wikipedia.org/wiki/SHA-2) digest in Base64 encoding from input string.
```js
import { sha256base64 } from "ohash";
// "pZGm1Av0IEBKARczz7exkNYsZb8LzaMrV7J32a2fFG4"
console.log(sha256base64("Hello World"));
```
## 💻 Development
- Clone this repository
- Enable [Corepack](https://github.com/nodejs/corepack) using `corepack enable` (use `npm i -g corepack` for Node.js < 16.10)
- Install dependencies using `pnpm install`
- Run interactive tests using `pnpm dev`
## License
Made with 💛
Published under [MIT License](./LICENSE).
Based on [puleos/object-hash](https://github.com/puleos/object-hash) by [Scott Puleo](https://github.com/puleos/), and implementations from [perezd/node-murmurhash](https://github.com/perezd/node-murmurhash) and
[garycourt/murmurhash-js](https://github.com/garycourt/murmurhash-js) by [Gary Court](mailto:[email protected]) and [Austin Appleby](mailto:[email protected]) and [brix/crypto-js](https://github.com/brix/crypto-js).
[npm-version-src]: https://img.shields.io/npm/v/ohash?style=flat-square
[npm-version-href]: https://npmjs.com/package/ohash
[npm-downloads-src]: https://img.shields.io/npm/dm/ohash?style=flat-square
[npm-downloads-href]: https://npmjs.com/package/ohash
[github-actions-src]: https://img.shields.io/github/actions/workflow/status/unjs/ohash/ci.yml?branch=main&style=flat-square
[github-actions-href]: https://github.com/unjs/ohash/actions?query=workflow%3Aci
[codecov-src]: https://img.shields.io/codecov/c/gh/unjs/ohash/main?style=flat-square
[codecov-href]: https://codecov.io/gh/unjs/ohash
[bundle-src]: https://flat.badgen.net/bundlephobia/minzip/ohash
[bundle-href]: https://bundlephobia.com/package/ohash