TypeError: RedisStore is not a constructor

[J0hn3ch]

Hi everyone,

In one of my projects, a strange TypeError appear when I switch from Node.js v20.15.0 to Node.js v22.12.0 .
When I try to create a new RedisStore instance this type error occurs :

let redis_store = new RedisStore({
                  ^

TypeError: RedisStore is not a constructor
    at Object.<anonymous> (/home/***/db.js:164:19)
    at Module._compile (node:internal/modules/cjs/loader:1358:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1416:10)
    at Module.load (node:internal/modules/cjs/loader:1208:32)
    at Module._load (node:internal/modules/cjs/loader:1024:12)
    at Module.require (node:internal/modules/cjs/loader:1233:19)
    at require (node:internal/modules/helpers:179:18)
    at Object.<anonymous> (/home/***/app.js:27:25)
    at Module._compile (node:internal/modules/cjs/loader:1358:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1416:10)

Node.js v20.15.0

I find that the error can be solved using const { RedisStore } = require("connect-redis"); in the project with Node.js v22.12.0 with connect-redis version ^8.0.1.

---

Previously I used const RedisStore = require("connect-redis").default; in the project with Node.js v20.15.0 with connect-redis version ^7.1.1

Is there some reason why I cannot use the the same line of code in both version ?

[wavded]

I am running Node 23 currently without issues. Do you have a small project that duplicates this issue?

Is there some reason why I cannot use the the same line of code in both version ?

We ran into compatibility issues between CommonJS and ESM projects, this makes one common API. (see #411)

[beauspot]

I am currently running into a similar issue and to make matters worst what I am getting is that RedisStore is an interface & not a class, now when I go into the module, I find out that there is both a class & an interface that uses the "RedisStore" as a variable and both are been and now I cannot work with it. this is what I am getting when I import RedisStore as an object: (alias) interface RedisStore
import RedisStore and it's supposed to be a class. Please can someone help me with this?

[wavded]

Not sure what's going on there. That second screenshot you shared looks incorrect. It almost looks like you maybe installed the @types/connect-redis package? That is legacy and should not be installed with recent versions of connect-redis as the types are already included.

[beauspot]

Not sure what's going on there. That second screenshot you shared looks incorrect. It almost looks like you maybe installed the @types/connect-redis package? That is legacy and should not be installed with recent versions of connect-redis as the types are already included.

Thank you very much I would attempt to delete the @types/connect-redis module and attempt it again oh and Happy new year from Nigeria.

[zackyjc]

If redisClient is undefined, it will cause error.

try it:

var redisClient = await createClient({})...
var redisStore = new RedisStore({
		client: redisClient
	});

[beauspot]

Are you installing the "@types/connect-redis" dependency ?

[MayurVirkar]

I am facing the exact same issue. I am on node 23.5
I am using
"connect-redis": "^8.0.1",
With
"ioredis": "^5.4.2",

Section of my code

const RedisStore = require('connect-redis');
const Redis = require('ioredis');

const client = new Redis({
    db: config.redisSessionDatabaseIndex
});

let redisStore = new RedisStore({
    client: client
});

error

let redisStore = new RedisStore({
                 ^

TypeError: RedisStore is not a constructor
    at Object.<anonymous> (app.js:27:18)

[tigermax139]

That's an issue on Node.js 22 and lower.
The quick and dirty solution is just implementing connect interface manually. (See index.ts for inspiration)

[MayurVirkar]

I am on nodejs 23.5

[basithsabdul]

Same problem with Node.js v22.13.0 also. Only if we initialize "const { RedisStore } = require("connect-redis");" the error is not occurring.

Node.js v22.13.0
├── [email protected]
└── [email protected]

[wavded]

There is no default export anymore in Redis v8. See v8 release migration notes and latest readme:

For CommonJS-style imports it should look like:

const { RedisStore } = require("connect-redis");