browser-id/lib/browserID.js

Unique ID for current browser (client).

import { v4 as uuid } from 'uuid';
import { Storage } from 'versioned-storage';
var STORAGE_NAME = 'browser_id';
var STORAGE_VERSION = 1;
var storage = new Storage(STORAGE_NAME, STORAGE_VERSION);
/**
 * A function that returns a consistent unique identifier for the browser (or the Node/Deno environment).
 * The same browser will always return the same identifier.
 * @returns {string} The unique identifier.
 */
export function browserId() {
    var existingID = storage.read();
    if (existingID === null || existingID === undefined) {
        var newID = uuid();
        storage.write(newID);
        return newID;
    }
    else {
        return existingID;
    }
}