[Ionic v4] ion-backdrop not a known element

[marcelgoya]

Bug Report

The component is throwing an error when used inside a html template:

ERROR Error: Uncaught (in promise): Error: Template parse errors:
'ion-backdrop' is not a known element:

Ionic Info
Run ionic info from a terminal/cmd prompt and paste the output below.

Ionic:

   ionic (Ionic CLI)          : 4.0.1 (/usr/lib/node_modules/ionic)
   Ionic Framework            : @ionic/angular 4.0.0-beta.0
   @angular-devkit/core       : 0.7.0-rc.3
   @angular-devkit/schematics : 0.7.0-rc.3
   @angular/cli               : 6.0.8
   @ionic/ng-toolkit          : 1.0.0
   @ionic/schematics-angular  : 1.0.1

Cordova:

   cordova (Cordova CLI) : 8.0.0
   Cordova Platforms     : android 7.0.0, ios 4.5.4

System:

   NodeJS : v9.11.2 (/usr/bin/node)
   npm    : 6.2.0
   OS     : Linux 4.4

Environment:

   ANDROID_HOME : not set

Describe the Bug
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Steps to Reproduce
Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Related Code

<ion-content padding> <ion-backdrop stopPropagation="false"></ion-backdrop> </ion-content>

Expected Behavior
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Additional Context
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[manucorporat]

What's your use case to use an ion-backdrop?

[marcelgoya]

@manucorporat I'm having an instant messaging dialog and I want to display the backdrop until the page has been fully loaded.

[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.