bug: Compiled files issue with angular 19

[devilalex505]

Prerequisites

• I have read the Contributing Guidelines.
• I agree to follow the Code of Conduct.
• I have searched for existing issues that already report this problem, without success.

Ionic Framework Version

v8.x

Current Behavior

When I use the compiled file from www, i can't run the project.
If go on the browser, I have this error :
"NullInjectorError: No provider for ho!"

Expected Behavior

If i go on the browser, with the compiled files, the app works normally.

Steps to Reproduce

1. Install the last ionic/cli
   npm uninstall -g ionic
   npm install -g ionic

2. ionic start a starter project (example : tabs)

3. run ionic build

4. add a simple file inside the /www folder after the build (run.js) :

`const express = require('express');
const path = require('path');
const app = express();

/**

• Instead of build provide your build directory.
  */
  app.use(express.static(path.join(__dirname, '')));

app.get('/*', function (req, res) {
res.sendFile(path.join(__dirname, '', 'index.html'));
});

var server = app.listen(9000, () => {
var port = server.address().port;
console.log('App listening at http://localhost:' + port);
require('child_process').exec(start http://localhost:${server.address().port});
});`

5. execute "node run.js"

6. open the browser and try the app. Then observe the issue.

7. Bonus : If you add in the angular.json file "optimization:false" to the production configuration so it works. I think the problem come from the "uglification"

Code Reproduction URL

https://github.com/devilalex505/test-ez0kwm

Ionic Info

Ionic:

Ionic CLI : 7.2.0
Ionic Framework : @ionic/angular 8.4.1
@angular-devkit/build-angular : 19.0.6
@angular-devkit/schematics : 19.0.6
@angular/cli : 19.0.6
@ionic/angular-toolkit : 12.1.1

Capacitor:

Capacitor CLI : 6.2.0
@capacitor/android : 6.2.0
@capacitor/core : 6.2.0
@capacitor/ios : not installed

Utility:

cordova-res : not installed globally
native-run : 2.0.1

System:

NodeJS : v20.11.0
npm : 10.2.4
OS : Windows 10

Additional Information

https://stackblitz.com/~/github.com/devilalex505/test-ez0kwm
1 . ng build
2 . node run.js

If downgrade angular to v18, no issue

[devilalex505]

I created a stackblitz :

https://stackblitz.com/~/github.com/devilalex505/test-ez0kwm
1 . ng build
2 . node run.js

[technbuzz]

May be no official support for version 19 yet

[kinggolf]

@devilalex505 I am seeing the same error. I can do non-production builds and ionic serve just fine. But production builds fail.

NullInjectorError: R3InjectorError(Platform: core)[i -> Os]: 
  NullInjectorError: No provider for Os!
⚡️  URL: capacitor://localhost/main.08517015048d961f.js
⚡️  [error] - {"name":"NullInjectorError","ngTempTokenPath":null,"ngTokenPath":["i","Os"]}
⚡️  main.08517015048d961f.js:1:1473064

[devilalex505]

Setting optimization to false on angular.json (as a temporary workaround) will make the app to complile again.

[...]
"configurations": {
  "production": {
+    "buildOptimizer": false,
+    "optimization": false,
[...]

Already said in the initial bug :

[NorthFred]

I have this issue in 2 projects when upgrading to Angular 19 (stand-alone). Running with ionic serve --configuration development works fine. The production build ionic serve --configuration production will fail with NullInjector errors. For now I need to stick to Angular 18.