[V3] Content: scroll events not enabled

[jsayol]

Ionic version: (check one with "x")
[ ] 1.x
[ ] 2.x
[x] 3.0.0-beta.3

I'm submitting a ... (check one with "x")
[x] bug report
[ ] feature request
[ ] support request

Current behavior:
The ionScroll, ionScrollStart, and ionScrollEnd outputs of the Content component never emit.

Expected behavior:
These outputs should emit on scroll events.

Steps to reproduce:
Either on the template:

<ion-content (ionScroll)="doSomething($event)"></ion-content>

Or inside a component that has Content:

// ...
@ViewChild(Content) content: Content;
// ...
this.content.ionScroll.subscribe(event => { /* do something */});

Related code:
It seems these 3 EventEmiters are not attached to the underlying ScrollView events, since enableScrollListener() is never called: https://github.com/driftyco/ionic/blob/63fd63e72e8cf44767ec8ca2d6ba0e6b9f071317/src/components/content/content.ts#L386-L418

If I manually enable it, then the scroll otuputs emit events as expected. But that shouldn't be necessary, considering I'm accessing @hidden methods and properties:

if (!this.content._scroll.enabled) {
  this.content.enableScrollListener();
}

Other information:

Ionic info:

  Your system information:

    Cordova CLI: 6.5.0
    Ionic Framework Version: 3.0.0-beta.3
    Ionic CLI Version: 3.0.0-beta.5
    ios-deploy version: Not installed
    ios-sim version: Not installed
    OS: Windows 10
    Node Version: v7.7.1
    Xcode version: Not installed

[brandyscarney]

Thanks for the detailed issue! It seems this was an issue in 2.3.0 also, duplicate of #10938.

[jsayol]

Oops, sorry, should have checked. Closing this in favor of #10938.

[brandyscarney]

@jsayol Ha, I just realized I linked you back to your own issue. Oops, glad you found it. :)

[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.