Function fails with `ShopifyFunction is not defined` error

Functions
1

Deployed function for the first time to staging and now getting

Error:8:11 ShopifyFunction is not defined. Please rebuild your function using the latest version of Shopify CLI.
    at run_default (function.mjs:8:11)
    at run2 (function.mjs:98:10)
    at <anonymous> (eval_script:1:37)

Same code works well for the development app but fails for the staging app.

1 Like
2

Have you tried doing what the error message says?

3

Yes, @Luke.

Another line to make it 20 characters

4

I would check your dependencies are up to date, e.g. latest cli version and then retest on your dev app.

Also ensuring that the code is identical between dev and staging :slight_smile:

5

Are you still seeing this issue @Post_Purchase_Deals ?

6

Still no luck @Liam-Shopify. I have three .toml file for my app and my work flow is as below:

I am using the latest cli client:

@shopify/cli/3.82.0 darwin-x64 node-v20.18.1
  1. I develop using the shopify.app.toml file, created the function, built, deployed, works.
  2. I then switch to shopify.app.staging.toml file, deployed the app, didn’t work. After a few deploys, started working without any code changes.
  3. I then switch to shopify.app.live.toml file, deployed the app. The deployment process did build the function, deployed it, but then keeps giving me the same error.

I then removed the extension directory, generated a brand new extension, deployed it, same error.

I then manually shopify app function build, got javy confirmation that the function is built, deployed it and still getting the same exact error.

my-function-name        │ Bundling JS function...
my-function-name        │ Running javy...
my-function-name        │ Done!

Error:8:11 ShopifyFunction is not defined. Please rebuild your function using the latest version of Shopify CLI.
    at run_default (function.mjs:8:11)
    at run2 (function.mjs:28:10)
    at <anonymous> (eval_script:1:37)
7

I have the same issue, running shopify v3.80.7 and node v22.16.0.

IS there an update on this?

8

I’m getting the same issue.

Targeting 2025-07

I manually updated my extension dependencies to

"@shopify/shopify_function": "2.0.0"

reverting back to

"@shopify/shopify_function": "1.0.6"

resolves the error.

9

Hi @Post_Purchase_Deals

What version of the @shopify/shopify_function package are you using? Also if you run the function locally with shopify app function run - what happens?

10

2.0.0

Another line just to make it 20 chars

11

DMing for more details

12

It’s possible this is due to an older version of Javy being run with "@shopify/shopify_function": "2.0.0" - digging into this more.