Setup Node fails with node 14

[dpalvolgyi-pw]

Description:
When installing node 14 with the action, runs to an error (with syntax that's not supported by node 14)

Action version:
v6

Platform:

• Ubuntu
• macOS
• Windows

Runner type:

• Hosted
• Self-hosted

Tools version:

node: 14.21.3
yarn: 3.8.7
Repro steps:
Repro in this file: https://github.com/dpalvolgyi-pw/setup-node-repro/blob/main/.github/workflows/main.yaml

Expected behavior:
Setup node does not crash

Actual behavior:
It crashes

Additional Info
There is no indication that node 14 is not supported, the examples even show node 12.

[priya-kinthali]

Hello @dpalvolgyi-pw👋,
Thank you for reporting this issue. We will investigate it and get back to you as soon as we have some feedback.

[priyagupta108]

Hi @dpalvolgyi-pw,
Node 14 can’t run the modern Corepack/Yarn shims.

Even though Node 14 installs successfully, the Corepack/Yarn shim uses newer JS syntax (e.g., ??=) that Node 14 can’t parse, so it fails with SyntaxError: Unexpected token '??='.

If you need to stay on Node 14, don’t use Corepack or Yarn Berry (v3/v4). Use Yarn Classic (v1.x) instead.
If you want Yarn Berry (v3/v4), don’t use Node 14. Upgrade to Node 18+ where Corepack/Yarn shims are compatible.

Hope this clarifies the behavior.

[priyagupta108]

Hi @dpalvolgyi-pw, quick check-in to see if the explanation/suggestion above resolved this. If everything looks good now, please confirm and we can close this issue. Thanks!