Support for rxjs 7

[prabh-62]

Description

Angular 12 workspace comes bundled with rxjs 6.6.0

❯ npx @angular/cli@12.0.0-rc.1 new web-apps --create-application false --skip-install

Describe the solution you'd like

Angular 12 workspace should come bundled with rxjs 7

RxJS 7 Slides: https://docs.google.com/presentation/d/1-LU7YE3NWw8jHeAgdmLu4CBfG7osCx6MsSIeFs16k60

I see pull request angular/angular-cli#20669 was closed recently.

[alan-agius4]

Before update to RXJS 7.0, the framework needs to be compatible.

Transferring to the FW repo to keep tracking this.

[jelbourn]

rxjs v7 won't be stable for v12, so it won't be included by default.

Related: #41590

[PowerKiKi]

rxjs v7 won't be stable for v12, so it won't be included by default.

@jelbourn, actually rxjs 7.0.0 was released 1 day before you said that. Were you not aware of that release at that time or did you mean that rxjs 7 support in Angular won't be stable enough for v12 ?

[alxhub]

rxjs v7 won't be stable for v12, so it won't be included by default.

@jelbourn, actually rxjs 7.0.0 was released 1 day before you said that. Were you not aware of that release at that time or did you mean that rxjs 7 support in Angular won't be stable enough for v12 ?

v12's first Release Candidate (rc0) was cut 2 weeks ago. After that, the versions of dependencies such as RxJS are generally fixed.

Note that this doesn't mean you can't use RxJS 7 with Angular v12 - changes such as #41590 will still land to ensure the framework is compatible with the new RxJS. We just can't change the default/minimum required version until v13, as doing so is a breaking change for users and we don't merge such changes in the RC period.

[jelbourn]

Yeah, it caught me by surprise- I wasn't expecting it until after v12 since there are still outstanding issues w/ v7 inside Google.

[BenRacicot]

I had read somewhere that V7 was good to go on V12, hmm.
Should we not force it? npm i --legacy-peer-deps

➜ client git:(master) ✗ npm i
npm ERR! code ERESOLVE
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR!
npm ERR! While resolving: aspectratia@0.0.0
npm ERR! Found: rxjs@7.0.1
npm ERR! node_modules/rxjs
npm ERR! rxjs@"~7.0.1" from the root project
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! peer rxjs@"^6.5.3" from @angular/core@12.0.0
npm ERR! node_modules/@angular/core
npm ERR! @angular/core@"~12.0.0" from the root project
npm ERR! peer @angular/core@"12.0.0" from @angular/animations@12.0.0
npm ERR! node_modules/@angular/animations
npm ERR! @angular/animations@"~12.0.0" 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.
npm ERR!
npm ERR! See /Users/bracicot/.npm/eresolve-report.txt for a full report.

npm ERR! A complete log of this run can be found in:
npm ERR! /Users/bracicot/.npm/_logs/2021-05-15T01_52_18_845Z-debug.log