How to generate unique ID with node.js

Question

function generate(count) {
    var founded = false,
        _sym = \'abcdefghijklmnopqrstuvwxyz1234567890\',
        str = \'\';
    while(!founded) {
        for(va         


        

Answer 1

Another approach is using the shortid package from npm.

It is very easy to use:

var shortid = require('shortid');
console.log(shortid.generate()); // e.g. S1cudXAF

and has some compelling features:

ShortId creates amazingly short non-sequential url-friendly unique ids. Perfect for url shorteners, MongoDB and Redis ids, and any other id users might see.

• By default 7-14 url-friendly characters: A-Z, a-z, 0-9, _-
• Non-sequential so they are not predictable.
• Can generate any number of ids without duplicates, even millions per day.
• Apps can be restarted any number of times without any chance of repeating an id.

Answer 2

used https://www.npmjs.com/package/uniqid in npm

npm i uniqid

It will always create unique id's based on the current time, process and machine name.

• With the current time the ID's are always unique in a single process.
• With the Process ID the ID's are unique even if called at the same time from multiple processes.
• With the MAC Address the ID's are unique even if called at the same time from multiple machines and processes.

Features:-

• Very fast
• Generates unique id's on multiple processes and machines even if called at the same time.
• Shorter 8 and 12 byte versions with less uniqueness.