Ionic 4.0 : 'ion-slide' is not a known element

[sukheja-varun]

I am using ion-slides in a new component.

carousel.component.html

  <ion-slide>
    <h1>Slide 1</h1>
  </ion-slide>
  <ion-slide>
    <h1>Slide 2</h1>
  </ion-slide>
  <ion-slide>
    <h1>Slide 3</h1>
  </ion-slide>
</ion-slides>

Just before adding ion-slides my component seems to work fine but as soon as I ass above lines. I get below error:

'ion-slide' is not a known element:
1. If 'ion-slide' is an Angular component, then verify that it is part of this module.
2. If 'ion-slide' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message. ("<ion-slides pager="true" >
  [ERROR ->]<ion-slide>
    <h1>Slide 1</h1>
  </ion-slide>
"): ng:///SharedModule/CarouselComponent.html@1:2
'ion-slide' is not a known element:
1. If 'ion-slide' is an Angular component, then verify that it is part of this module.
2. If 'ion-slide' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message. ("
    <h1>Slide 1</h1>
  </ion-slide>
  [ERROR ->]<ion-slide>
    <h1>Slide 2</h1>
  </ion-slide>

Also I have created a Stack Overflow question for this issue
https://stackoverflow.com/questions/54309846/ionic-4-ion-slide-is-not-a-known-element/54335516#54335516

[manucorporat]

Can you fill the issue template properly? otherwise it's impossible to pinpoint the issue

[paulstelzer]

Already solved by adding IonicModule.forRoot(), to the AppModule

@NgModule({
  imports: [
    ...
    IonicModule.forRoot(),
  ]
})

and adding IonicModule to the module where the Ionic component should be used

[sukheja-varun]

@paulstelzer I have already added IonicModule to AppModule but this does not solve my issue, though adding it to sub-module where I am using Ionic-slide solves the issue.
Do I need to add IonicModule in every Module of my project?

[paulstelzer]

In Angular, yes - like normal

[ionitron-bot]

Thanks for the issue! This issue is being locked to prevent comments that are not relevant to the original issue. If this is still an issue with the latest version of Ionic, please create a new issue and ensure the template is fully filled out.