DeprecationWarning: The 'punycode' module is deprecated when running ng add @angular/fire

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#3,649 opened on May 7, 2025 2 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty: 3/5
Estimated time: 1-2 days
Newbie friendliness: 35/100

Issue type: Bug
Clarity: Mostly clear
Activity status: Stale
Tech stack: angular, firebase, node.js, typescript
Domain: cli, tooling

Research direction

Reproduce the warning in a new Angular 19 application by running ng add @angular/fire and selecting Authentication, Firestore, and Realtime Database. Inspect the schematic's dependency installation and configuration output to identify the source of the punycode warning; done means the setup completes without that deprecation warning.

Written by the indexing model from the issue text.

Description

DeprecationWarning: The 'punycode' module is deprecated when running ng add @angular/fire

Description:

When adding @angular/fire to a new Angular 19 application using the ng add @angular/fire schematic, a DeprecationWarning related to Node.js's punycode module is displayed.

Versions:

Angular CLI: (Please specify, e.g., 19.x.x)
Angular Core: (Please specify, e.g., 19.x.x)
@angular/fire: (Please specify the version installed by ng add, check package.json)
Node.js: (Please specify, e.g., v18.x.x, v20.x.x)
firebase-tools: 14.2.2 (as per the log)

Steps to Reproduce:

Create a new Angular 19 application:

ng new my-angular-app
cd my-angular-app

Run the ng add @angular/fire schematic:
```
ng add @angular/fire
```
During the installation and setup process, select the following Firebase features when prompted:
- Authentication
- Firestore
- Realtime Database

Expected Behavior:

The ng add @angular/fire schematic should complete without displaying deprecation warnings related to Node.js modules.

Current Behavior:

During the execution of the schematic, after selecting Firebase features and while dependencies are being installed or files are being configured, the following warning appears in the console:

Dominant language: TypeScript
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More TypeScript issues

DeprecationWarning: The 'punycode' module is deprecated when running ng add @angular/fire

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Assessment

Research direction

Description

DeprecationWarning: The 'punycode' module is deprecated when running ng add @angular/fire

Getting set up

First steps

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