A TypeScript GUID class?

Question

Does anyone know of a good, solid, implementation of C# like GUID (UUID) in TypeScript?

Could do it myself but figured I'd spare my time if someone else done it before.

Answer 1

Updated Answer

This is now something you can do natively in JavaScript/TypeScript with crypto.randomUUID().

Here's an example generating 20 UUIDs.

for (let i = 0; i < 20; i++) {
    let id = crypto.randomUUID();
    console.log(id);
}

Original Answer

There is an implementation in my TypeScript utilities based on JavaScript GUID generators.

Here is the code:

class Guid {
  static newGuid() {
    return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
      var r = Math.random() * 16 | 0,
        v = c == 'x' ? r : (r & 0x3 | 0x8);
      return v.toString(16);
    });
  }
}

// Example of a bunch of GUIDs
for (var i = 0; i < 20; i++) {
  var id = Guid.newGuid();
  console.log(id);
}

Please note the following:

C# GUIDs are guaranteed to be unique. This solution is very likely to be unique. There is a huge gap between "very likely" and "guaranteed" and you don't want to fall through this gap.

JavaScript-generated GUIDs are great to use as a temporary key that you use while waiting for a server to respond, but I wouldn't necessarily trust them as the primary key in a database. If you are going to rely on a JavaScript-generated GUID, I would be tempted to check a register each time a GUID is created to ensure you haven't got a duplicate (an issue that has come up in the Chrome browser in some cases).

Answer 2

I found this https://typescriptbcl.codeplex.com/SourceControl/latest

here is the Guid version they have in case the link does not work later.

module System {
    export class Guid {
        constructor (public guid: string) {
            this._guid = guid;
        }

        private _guid: string;

        public ToString(): string {
            return this.guid;
        }

        // Static member
        static MakeNew(): Guid {
            var result: string;
            var i: string;
            var j: number;

            result = "";
            for (j = 0; j < 32; j++) {
                if (j == 8 || j == 12 || j == 16 || j == 20)
                    result = result + '-';
                i = Math.floor(Math.random() * 16).toString(16).toUpperCase();
                result = result + i;
            }
            return new Guid(result);
        }
    }
}