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120 lines
4.5 KiB
120 lines
4.5 KiB
# hexoid [](https://github.com/lukeed/hexoid/actions) [](https://codecov.io/gh/lukeed/hexoid)
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> A tiny (190B) and [extremely fast](#benchmarks) utility to generate random IDs of fixed length
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_**Hexadecimal object IDs.** Available for Node.js and the browser._<br>Generate randomized output strings of fixed length using lowercased hexadecimal pairs.
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> **Notice:** Please note that this is not a cryptographically secure (CSPRNG) generator.
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Additionally, this module is delivered as:
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* **CommonJS**: [`dist/index.js`](https://unpkg.com/hexoid/dist/index.js)
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* **ES Module**: [`dist/index.mjs`](https://unpkg.com/hexoid/dist/index.mjs)
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* **UMD**: [`dist/index.min.js`](https://unpkg.com/hexoid/dist/index.min.js)
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## Install
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```
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$ npm install --save hexoid
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```
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## Usage
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```js
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import hexoid from 'hexoid';
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const toID = hexoid();
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// length = 16 (default)
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toID(); //=> '52032fedb951da00'
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toID(); //=> '52032fedb951da01'
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toID(); //=> '52032fedb951da02'
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// customize length
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hexoid(25)(); //=> '065359875047c63a037200e00'
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hexoid(32)(); //=> 'ca8e4aec7f139d94fcab9cab2eb89f00'
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hexoid(48)(); //=> 'c19a4deb5cdeca68534930e67bd0a2f4ed45988724d8d200'
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```
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## API
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### hexoid(length?)
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Returns: `() => string`
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Creates the function that will generate strings.
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#### length
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Type: `Number`<br>
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Default: `16`
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Then length of the output string.
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> **Important:** Your risk of collisions decreases with longer strings!<br>Please be aware of the [Birthday Problem](https://betterexplained.com/articles/understanding-the-birthday-paradox/)! You may need more combinations than you'd expect.
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The **maximum combinations** are known given the following formula:
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```js
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const combos = 256 ** (len/2);
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```
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## Benchmarks
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> Running on Node.js v10.13.0
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```
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Validation (length = 16):
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✔ hashids/fixed (example: "LkQWjnegYbwZ1p0G")
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✔ nanoid/non-secure (example: "sLlVL5X3M5k2fo58")
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✔ uid (example: "3d0ckwcnjiuu91hj")
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✔ hexoid (example: "de96b62e663ef300")
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Benchmark (length = 16):
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hashids/fixed x 349,462 ops/sec ±0.28% (93 runs sampled)
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nanoid/non-secure x 3,337,573 ops/sec ±0.28% (96 runs sampled)
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uid x 3,553,482 ops/sec ±0.51% (90 runs sampled)
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hexoid x 81,081,364 ops/sec ±0.18% (96 runs sampled)
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Validation (length = 25):
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✔ cuid (example: "ck7lj5hbf00000v7c9gox6yfh")
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✔ hashids/fixed (example: "r9JOyLkQWjnegYbwZ1p0GDXNm")
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✔ nanoid/non-secure (example: "hI202PVPJQRNrP6o6z4pXz4m0")
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✔ uid (example: "9904e9w130buxaw7n8358mn2f")
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✔ hexoid (example: "01dfab2c14e37768eb7605a00")
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Benchmark (length = 25):
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cuid x 161,636 ops/sec ±1.36% (89 runs sampled)
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hashids/fixed x 335,439 ops/sec ±2.40% (94 runs sampled)
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nanoid/non-secure x 2,254,073 ops/sec ±0.23% (96 runs sampled)
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uid x 2,483,275 ops/sec ±0.38% (95 runs sampled)
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hexoid x 75,715,843 ops/sec ±0.27% (95 runs sampled)
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Validation (length = 36):
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✔ uuid/v1 (example: "c3dc1ed0-629a-11ea-8bfb-8ffc49585f54")
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✔ uuid/v4 (example: "8c89f0ca-f01e-4c84-bd71-e645bab84552")
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✔ hashids/fixed (example: "EVq3Pr9JOyLkQWjnegYbwZ1p0GDXNmRBlAxg")
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✔ @lukeed/uuid (example: "069ad676-48f9-4452-b11d-f20c3872dc1f")
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✔ nanoid/non-secure (example: "jAZjrcDmHH6P1rT9EFdCdHUpF440SjAKwb2A")
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✔ uid (example: "5mhi30lgy5d0glmuy81llelbzdko518ow1sx")
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✔ hexoid (example: "615209331f0b4630acf69999ccfc95a23200")
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Benchmark (length = 36):
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uuid/v1 x 1,487,947 ops/sec ±0.18% (98 runs sampled)
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uuid/v4 x 334,868 ops/sec ±1.08% (90 runs sampled)
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@lukeed/uuid x 6,352,445 ops/sec ±0.27% (91 runs sampled)
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hashids/fixed x 322,914 ops/sec ±0.27% (93 runs sampled)
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nanoid/non-secure x 1,592,708 ops/sec ±0.25% (91 runs sampled)
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uid x 1,789,492 ops/sec ±0.29% (92 runs sampled)
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hexoid x 71,746,692 ops/sec ±0.29% (93 runs sampled)
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```
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## Related
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- [uid](https://github.com/lukeed/uid) - A smaller (134B) but slower variant of this module with a different API
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- [@lukeed/uuid](https://github.com/lukeed/uuid) - A tiny (230B), fast, and cryptographically secure UUID (V4) generator for Node and the browser
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## License
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MIT © [Luke Edwards](https://lukeed.com)
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