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

1npm i uuid-tool

NPM Package

Example

1let uuid = UuidTool.newUuid();
2let bytes = UuidTool.toBytes(uuid);
3let strAgain = UuidTool.toString(bytes);
4let isValid = UuidTool.isUuid(strAgain);
5let isEqual = UuidTool.compare(uuid1, uuid2);

You can also use the Uuid class.

1let uuid = new Uuid(byteOrString);
2let str = uuid.toString();
3let bytes = uuid.toBytes();

1// Generate a new UUID
2let uuid = new Uuid();

1// Compare (case insensitive)
2let uuid1 = new Uuid('3C09B262-49C7-466F-8B4F-626BCA1EC9BC');
3let uuid2 = new Uuid('3c09b262-49c7-466f-8b4f-626bca1ec9bc');
4
5if (uuid1.equals(uuid2)) {
6  console.log('The IDs match.');
7} else {
8  console.log('The IDs do not match.');
9}
10
11// Result: The IDs match.

In NodeJS e.g.

1const Uuid = require('uuid-tool').Uuid;
2console.log(new Uuid().toString());

From Json:

1const jsonStr = '{ "id": "3c09b262-49c7-466f-8b4f-626bca1ec9bc" }';
2const uuid = Uuid.fromJson(jsonStr);
3// or as already parsed json object:
4const jsonObj = { id: '3c09b262-49c7-466f-8b4f-626bca1ec9bc' };
5const uuid = Uuid.fromJson(jsonObj);
6// 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