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Introducing Java Support in Socket
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uuid-browser
Advanced tools
The uuid-browser npm package is a simple, lightweight library for generating UUIDs (Universally Unique Identifiers) in browser environments. It provides various methods to create different versions of UUIDs, such as v1, v3, v4, and v5.
Generate UUID v1
UUID v1 is generated based on the current timestamp and the MAC address of the machine. This is useful for generating unique IDs that are time-based.
const uuidv1 = require('uuid-browser/v1');
const id = uuidv1();
console.log(id);
Generate UUID v3
UUID v3 is generated based on a namespace and a name using MD5 hashing. This is useful for generating deterministic UUIDs based on input strings.
const uuidv3 = require('uuid-browser/v3');
const id = uuidv3('name', uuidv3.DNS);
console.log(id);
Generate UUID v4
UUID v4 is generated randomly. This is the most commonly used version for generating unique IDs that do not need to be deterministic.
const uuidv4 = require('uuid-browser/v4');
const id = uuidv4();
console.log(id);
Generate UUID v5
UUID v5 is similar to v3 but uses SHA-1 hashing instead of MD5. This is useful for generating deterministic UUIDs with a different hashing algorithm.
const uuidv5 = require('uuid-browser/v5');
const id = uuidv5('name', uuidv5.DNS);
console.log(id);
The 'uuid' package is a popular library for generating UUIDs in both Node.js and browser environments. It supports the same versions of UUIDs (v1, v3, v4, v5) and is widely used in the JavaScript community. It is more versatile as it can be used in both server-side and client-side applications.
The 'shortid' package generates short, non-sequential, URL-friendly unique IDs. While it does not generate standard UUIDs, it is useful for cases where shorter IDs are sufficient and URL-friendliness is important. It is simpler and faster for generating unique IDs compared to uuid-browser.
The 'nanoid' package is a tiny, secure, URL-friendly unique string ID generator for JavaScript. It is smaller and faster than uuid-browser and is suitable for generating unique IDs in performance-critical applications. It does not generate standard UUIDs but provides a good alternative for unique ID generation.
Like seriously, nothing in this package is made by me
Simple, fast generation of RFC4122 UUIDS.
Features:
npm install uuid
Then generate your uuid version of choice ...
Version 1 (timestamp):
const uuidv1 = require('uuid/v1');
uuidv1(); // -> '6c84fb90-12c4-11e1-840d-7b25c5ee775a'
Version 4 (random):
const uuidv4 = require('uuid/v4');
uuidv4(); // -> '110ec58a-a0f2-4ac4-8393-c866d813b8d1'
Version 5 (namespace):
const uuidv5 = require('uuid/v5');
// ... using predefined DNS namespace (for domain names)
uuidv5('hello.example.com', uuidv5.DNS)); // -> 'fdda765f-fc57-5604-a269-52a7df8164ec'
// ... using predefined URL namespace (for, well, URLs)
uuidv5('http://example.com/hello', uuidv5.URL); // -> '3bbcee75-cecc-5b56-8031-b6641c1ed1f1'
// ... using a custom namespace
const MY_NAMESPACE = '<UUID string you previously generated elsewhere>';
uuidv5('Hello, World!', MY_NAMESPACE); // -> '90123e1c-7512-523e-bb28-76fab9f2f73d'
Browser-ready versions of this module are available via wzrd.in.
For version 1 uuids:
<script src="http://wzrd.in/standalone/uuid%2Fv1@latest"></script>
<script>
uuidv1(); // -> v1 UUID
</script>
For version 4 uuids:
<script src="http://wzrd.in/standalone/uuid%2Fv4@latest"></script>
<script>
uuidv4(); // -> v4 UUID
</script>
For version 5 uuids:
<script src="http://wzrd.in/standalone/uuid%2Fv5@latest"></script>
<script>
uuidv5('http://example.com/hello', uuidv5.URL); // -> v5 UUID
</script>
const uuidv1 = require('uuid/v1');
// Allowed arguments
uuidv1();
uuidv1(options);
uuidv1(options, buffer, offset);
Generate and return a RFC4122 v1 (timestamp-based) UUID.
options
- (Object) Optional uuid state to apply. Properties may include:
node
- (Array) Node id as Array of 6 bytes (per 4.1.6). Default: Randomly generated ID. See note 1.clockseq
- (Number between 0 - 0x3fff) RFC clock sequence. Default: An internally maintained clockseq is used.msecs
- (Number | Date) Time in milliseconds since unix Epoch. Default: The current time is used.nsecs
- (Number between 0-9999) additional time, in 100-nanosecond units. Ignored if msecs
is unspecified. Default: internal uuid counter is used, as per 4.2.1.2.buffer
- (Array | Buffer) Array or buffer where UUID bytes are to be written.
offset
- (Number) Starting index in buffer
at which to begin writing.
Returns buffer
, if specified, otherwise the string form of the UUID
Note: The id is generated guaranteed to stay constant for the lifetime of the current JS runtime. (Future versions of this module may use persistent storage mechanisms to extend this guarantee.)
Example: Generate string UUID with fully-specified options
uuidv1({
node: [0x01, 0x23, 0x45, 0x67, 0x89, 0xab],
clockseq: 0x1234,
msecs: new Date('2011-11-01').getTime(),
nsecs: 5678
}); // -> "710b962e-041c-11e1-9234-0123456789ab"
Example: In-place generation of two binary IDs
// Generate two ids in an array
const arr = new Array(32); // -> []
uuidv1(null, arr, 0); // -> [02 a2 ce 90 14 32 11 e1 85 58 0b 48 8e 4f c1 15]
uuidv1(null, arr, 16); // -> [02 a2 ce 90 14 32 11 e1 85 58 0b 48 8e 4f c1 15 02 a3 1c b0 14 32 11 e1 85 58 0b 48 8e 4f c1 15]
const uuidv4 = require('uuid/v4')
// Allowed arguments
uuidv4();
uuidv4(options);
uuidv4(options, buffer, offset);
Generate and return a RFC4122 v4 UUID.
options
- (Object) Optional uuid state to apply. Properties may include:
random
- (Number[16]) Array of 16 numbers (0-255) to use in place of randomly generated valuesrng
- (Function) Random # generator function that returns an Array[16] of byte values (0-255)buffer
- (Array | Buffer) Array or buffer where UUID bytes are to be written.offset
- (Number) Starting index in buffer
at which to begin writing.Returns buffer
, if specified, otherwise the string form of the UUID
Example: Generate string UUID with fully-specified options
uuid.v4({
random: [
0x10, 0x91, 0x56, 0xbe, 0xc4, 0xfb, 0xc1, 0xea,
0x71, 0xb4, 0xef, 0xe1, 0x67, 0x1c, 0x58, 0x36
]
});
// -> "109156be-c4fb-41ea-b1b4-efe1671c5836"
Example: Generate two IDs in a single buffer
const buffer = new Array(32); // (or 'new Buffer' in node.js)
uuid.v4(null, buffer, 0);
uuid.v4(null, buffer, 16);
const uuidv5 = require('uuid/v4');
// Allowed arguments
uuidv5(name, namespace);
uuidv5(name, namespace, buffer);
uuidv5(name, namespace, buffer, offset);
Generate and return a RFC4122 v4 UUID.
name
- (String | Array[]) "name" to create UUID withnamespace
- (String | Array[]) "namespace" UUID either as a String or Array[16] of byte valuesbuffer
- (Array | Buffer) Array or buffer where UUID bytes are to be written.offset
- (Number) Starting index in buffer
at which to begin writing. Default = 0Returns buffer
, if specified, otherwise the string form of the UUID
Example:
// Generate a unique namespace (typically you would do this once, outside of
// your project, then bake this value into your code)
const uuidv4 = require('uuid/v4');
const MY_NAMESPACE = uuidv4(); //
// Generate a couple namespace uuids
const uuidv5 = require('uuid/v5');
uuidv5('hello', MY_NAMESPACE);
uuidv5('world', MY_NAMESPACE);
npm test
The API below is available for legacy purposes and is not expected to be available post-3.X
const uuid = require('uuid');
uuid.v1(...); // alias of uuid/v1
uuid.v4(...); // alias of uuid/v4
uuid(...); // alias of uuid/v4
// uuid.v5() is not supported in this API
The code for the legacy node-uuid package is available in the node-uuid
branch.
FAQs
browser-part from the uuid-package
The npm package uuid-browser receives a total of 559,027 weekly downloads. As such, uuid-browser popularity was classified as popular.
We found that uuid-browser demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.
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We're excited to announce that Socket now supports the Java programming language.
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