some ViewContainerRef properties are missed in angular 9?

🐞 bug report

embeddedViews prperty not available in angular 9 viewcontainerRef property and there is no alternate property also available

Is this a regression?

yes

Description

This is my script condition in my source level which is working fine in angular 7 and 8,

if (this.isNgTemplate()) {
            let items = this.listViewInstance.element.querySelectorAll('.' + classNames.listItem);
            for (let index = 0; index < items.length; index++) {
                items[index].context = this.listViewInstance.viewContainerRef._embeddedViews[index].context;
            }

But throws script error in angular 9, if i disbale ivy working fine.

Validation details

I have validated and find root cause of my issue. in angular 7, viewcontainerRef property looks like below which has embeddedViews property so my script works fine.

But in angular 9, there is no embeddedViews property, viewcontainer property looks like beloe:

🔬 Minimal Reproduction

Working sample

• Angular 7 sample - Angular 7-ListView.zip

• download above sample

• Give npm i and then give ng serve

• you will see no script error in console

issue reproducing sample

• angular 9 sample Angular9-Virtualization template.zip

• do same steps - you will see console error

🌍 Your Environment

Angular Version:

"@angular/animations": "~9.0.0",
    "@angular/common": "~9.0.0",
    "@angular/compiler": "~9.0.0",
    "@angular/core": "~9.0.0",
    "@angular/forms": "~9.0.0",
    "@angular/platform-browser": "~9.0.0",
    "@angular/platform-browser-dynamic": "~9.0.0",
    "@angular/router": "~9.0.0",
 "@angular-devkit/build-angular": "~0.900.1",
    "@angular/cli": "~9.0.1",
    "@angular/compiler-cli": "~9.0.0",
    "@angular/language-service": "~9.0.0",

Anything else relevant? when disale IVY, there is now console error.

[kumaresan-subramani]

_embeddedViews is a private API so while you might have seen it under debugger, this is not the contract you can use in your application. If you want to get a view from a ViewContainerRef you can use the get method: https://angular.io/api/core/ViewContainerRef

Thanks @pkozlowski-opensource , this comment solve my issue but i haven’t check properly at my end. Due cache problem this takes time

[kumaresan-subramani]

@pkozlowski-opensource , please check below which will help you to find cause or something?

repro stesp

• download sample - Angular9-Virtualization template.zip

• Giev npm i and then ng serve

• you will see console error in browser

reason

In my source, i have used embededview api to get component view and update my component native element template property.

details

in below, i am updating template values to my created element using embededview api

after updating template value from embedded views, my element items looks like below

above template values has been taken from this.listViewInstance.viewContainerRef._embeddedViews

But in angular9, i didn’t get any reference so that i am not able to update my element template values