UUID Tool

Lightweight UUID library for JavaScript, written in TypeScript. (Types declarations included.) Simple to use, simply works. Well tested and no dependencies. For NodeJS and Browser.

Parse and generate UUIDs. Convert between UUID string (36 byte) to 16 byte array. UUID RFC 4122 Version 4

Install

npm i uuid-tool

NPM Package

Example

let uuid = UuidTool.newUuid();
let bytes = UuidTool.toBytes(uuid);
let strAgain = UuidTool.toString(bytes);
let isValid = UuidTool.isUuid(strAgain);
let isEqual = UuidTool.compare(uuid1, uuid2);

You can also use the Uuid class.

let uuid = new Uuid(byteOrString);
let str = uuid.toString();
let bytes = uuid.toBytes();

// Generate a new UUID
let uuid = new Uuid();

// Compare (case insensitive)
let uuid1 = new Uuid('3C09B262-49C7-466F-8B4F-626BCA1EC9BC');
let uuid2 = new Uuid('3c09b262-49c7-466f-8b4f-626bca1ec9bc');

if (uuid1.equals(uuid2)) {
  console.log('The IDs match.');
} else {
  console.log('The IDs do not match.');
}

// Result: The IDs match.

In NodeJS e.g.

const Uuid = require('uuid-tool').Uuid;
console.log(new Uuid().toString());

From Json:

const jsonStr = '{ "id": "3c09b262-49c7-466f-8b4f-626bca1ec9bc" }';
const uuid = Uuid.fromJson(jsonStr);
// or as already parsed json object:
const jsonObj = { id: '3c09b262-49c7-466f-8b4f-626bca1ec9bc' };
const uuid = Uuid.fromJson(jsonObj);
// otherwise it throws an error on invalid inputs.

API

UuidTool

toBytes (uuid)

Converts an UUID string to an UUID byte array.

| Param | Type | Description | | ----- | ------ | ------------------------------------------------------- | | uuid | string | UUID string e.g. '1FBD384C-B2A1-41C6-84AF-43CABDF44124' |

Returns number[] UUID byte array (length: 16)

toString (bytes)

Converts an UUID byte array to an UUID string.

| Param | Type | Description | | ----- | -------- | ------------------------------------------ | | bytes | number[] | UUID Byte array (length 16 bytes of bytes) |

Returns string UUID string. (length 36)

newUuid ()

Generates a new (pseudo) UUID RFC 4122 Version 4.

Returns string UUID e.g. '1FBD384C-B2A1-41C6-84AF-43CABDF44124'

isUuid (uuid)

Converts an UUID byte array to an UUID string.

| Param | Type | Description | | ----- | ------ | ------------------------------------------------------- | | uuid | string | UUID string e.g. '1FBD384C-B2A1-41C6-84AF-43CABDF44124' |

Returns boolean True if valid, otherwise false.

compare (uuid1, uuid2)

Compares two UUIDs.

| Param | Type | Description | | ----- | ------ | ----------- | | uuid1 | string | UUID string | | uuid2 | string | UUID string |

Returns boolean True if equal, otherwise false.

Uuid

generate ()

Re-generates a new UUID for this instance.

Returns this The same UUID instance.

fromBytes (bytes)

Converts an UUID byte array to an UUID string. (length: 36) Note that the internal UUID has not yet been validated. Use the method isValid.

| Param | Type | Description | | ----- | -------- | ------------------------------------------ | | bytes | number[] | UUID Byte array (length 16 bytes of bytes) |

Returns this The same UUID instance.

toBytes ()

Converts this UUID to an UUID byte array. (length: 16)

Returns number[] The UUID as byte array.

fromString (uuid)

Converts an UUID byte array to an UUID string. (length: 36) Note that the internal UUID has not yet been validated. Use the method isValid.

| Param | Type | Description | | ----- | ------ | -------------------------------------------------- | | uuid | string | string e.g. '1FBD384C-B2A1-41C6-84AF-43CABDF44124' |

Returns this The same UUID instance.

toString ()

To UUID string. HINT Set case mode by Uuid.stringExportFormat = 'uppercase' | 'lowercase'; This also affects the result of JSON.stringify(...);

Returns string UUID string e.g. '1FBD384C-B2A1-41C6-84AF-43CABDF44124'

isValid ()

Validate this UUID.

Returns boolean True if valid, otherwise false.

equals (uuid)

Compares this UUID with another UUID.

| Param | Type | Description | | ----- | -------------- | ------------------------------------- | | uuid | Uuid | string | Another UUID instance or uuid-string. |

Returns boolean True if equal, otherwise false.

static fromJson (json)

Converts the JSON representation of this class to this class.

| Param | Type | Description | | ----- | ------------------ | ---------------------------------------- | | uuid | UuidLike | string | The string representation of this class. |

Returns Uuid The Uuid class with the parsed input object.

License

MIT © Copyright 2018 - 2021 Dominik-Andreas Geng (@domske)

UUID logo © Copyright 2021 Dominik Geng