Create a unique object identifier with javascript

Question

The objects I use on the client side need a unique ID. My array of objects is very small, commonly 4 items, not more.

I use this:

export class MyItem {   
    uniqueObjectIdentifier: number;
    constructor(obj) {    
        this.uniqueObjectIdentifier = Math.random();
    }
}

Is there something maybe javascript or angular internal that I can access instead of the handcrafted property?

Answer 1

You can use a Symbol.

Every symbol value returned from Symbol() is unique.

export class MyItem {
  uniqueObjectIdentifier: symbol;
  constructor(obj) {
    this.uniqueObjectIdentifier = Symbol();
  }
}

If browser support doesn't allow you to use a symbol, you can use a reference to an object instead.

export class MyItem {
  uniqueObjectIdentifier: object;
  constructor(obj) {
    this.uniqueObjectIdentifier = {};
  }
}