Error: Can't resolve 'rxjs/Observable'

[nabeeldev1]

Having issue while building angular-cli (angular 7) based application.
Working fine for angular 2,4 & 5

Angular Version:
"@angular/animations": "^7.0.1",
"@angular/cdk": "^7.0.2",
"@angular/common": "~7.0.0",
"@angular/compiler": "~7.0.0",
"@angular/core": "~7.0.0",
"@angular/forms": "~7.0.0",
"@angular/http": "~7.0.0",
"@angular/material": "^7.0.2",
"@angular/platform-browser": "~7.0.0",
"@angular/platform-browser-dynamic": "~7.0.0",
.....................
}

Angular-cli version
Angular CLI: 7.0.4
Node: 10.11.0
OS: linux x64
Angular:
...

Package Version

@angular-devkit/architect 0.10.4
@angular-devkit/core 7.0.4
@angular-devkit/schematics 7.0.4
@schematics/angular 7.0.4
@schematics/update 0.10.4
rxjs 6.3.3
typescript 3.1.3

[robinComa]

Hello,

You use rx/js v6.3.3 but single spa angular cli uses the v5.5.6, and as you know, rx has breaking change between 5 and 6...
You can propose a PR on the project to upgrade the rxjs version

[fvanwijk]

Since Angular 7, rxjs-compat isn't in your project automatically. Also when you run the Angular updater:

I think it a is a good idea to update the example app to the newest CLI version.