PrimeNG 11 requires Angular < 11

[bjansen]

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[ ] feature request => Please check if request is not on the roadmap already https://github.com/primefaces/primeng/wiki/Roadmap
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Current behavior
Version 11 requires Angular 7/8/9/10, but does not accept 11 :(

I get an error with NPM 7.0.14 / node.js 15.x:

npm ERR! code ERESOLVE
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR!
npm ERR! While resolving: [email protected]
npm ERR! Found: @angular/[email protected]
npm ERR! node_modules/@angular/common
npm ERR!   @angular/common@"^11.0.3" from the root project
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! peer @angular/common@"^7.0.0 || ^8.0.0 || ^9.0.0 || ^10.0.0" from [email protected]
npm ERR! node_modules/primeng
npm ERR!   primeng@"^11.0.0" from the root project
npm ERR!
npm ERR! Fix the upstream dependency conflict, or retry
npm ERR! this command with --force, or --legacy-peer-deps
npm ERR! to accept an incorrect (and potentially broken) dependency resolution.

And a warning with NPM 6.14.8 / node.js 14.x:

npm WARN [email protected] requires a peer of @angular/core@^7.0.0 || ^8.0.0 || ^9.0.0 || ^10.0.0 but none is installed. You must install peer dependencies yourself.
npm WARN [email protected] requires a peer of @angular/common@^7.0.0 || ^8.0.0 || ^9.0.0 || ^10.0.0 but none is installed. You must install peer dependencies yourself.
npm WARN [email protected] requires a peer of @angular/forms@^7.0.0 || ^8.0.0 || ^9.0.0 || ^10.0.0 but none is installed. You must install peer dependencies yourself.

Expected behavior
PrimeNG 11 should work with Angular 11, as per the release announcement.

Unzipping https://registry.npmjs.org/primeng/-/primeng-11.0.0.tgz, I can see the following in package.json:

  "peerDependencies": {
    "@angular/core": "^7.0.0 || ^8.0.0 || ^9.0.0 || ^10.0.0",
    "@angular/common": "^7.0.0 || ^8.0.0 || ^9.0.0 || ^10.0.0",
    "@angular/forms": "^7.0.0 || ^8.0.0 || ^9.0.0 || ^10.0.0",
    "rxjs": "^6.0.0",
    "zone.js": "^0.10.2"
  },

• Angular version: 11.0.3

• PrimeNG version: 11.0.0

[bjansen]

Ah, there was a breaking change regarding peer dependencies conflicts, what was a warning in NPM <= 6 is now an error in NPM 7, see https://blog.npmjs.org/post/626173315965468672/npm-v7-series-beta-release-and-semver-major

BREAKING CHANGE: this can cause some packages to not be installable, if they have unresolveable peer dependency conflicts. While the correct solution is arguably to fix the conflict, this was not forced upon users for several years, and some have come to rely on this lack of correctness. Use the --legacy-peer-deps config flag if impacted.