itemRevealed$.subscribe return undefined item

[SandrineProusteau]

Bug Report or Feature Request (mark with an x)

- [ x] bug report -> please search issues before submitting
- [ ] feature request

OS and Version?

Windows 10, Chrome

Versions

Angular CLI: 7.3.6
Node: 10.15.3
OS: win32 x64
Angular: 7.2.9
... animations, common, compiler, compiler-cli, core, forms
... language-service, platform-browser, platform-browser-dynamic
... router

Package Version

@angular-devkit/architect 0.13.6
@angular-devkit/build-angular 0.13.6
@angular-devkit/build-optimizer 0.13.6
@angular-devkit/build-webpack 0.13.6
@angular-devkit/core 7.3.6
@angular-devkit/schematics 7.3.6
@angular/cdk 7.3.5
@angular/cli 7.3.6
@angular/material 7.3.5
@angular/pwa 0.12.4
@angular/service-worker 7.2.10
@ngtools/webpack 7.3.6
@schematics/angular 7.3.6
@schematics/update 0.13.6
rxjs 6.3.3
typescript 3.2.4
webpack 4.29.0

Repro steps

Follow the readme instructions, and display a console.log on
this.wowSubscription = this.wowService.itemRevealed$.subscribe(
(item:HTMLElement) => {
// do whatever you want with revealed element
console.log(item);
});

Running the app with ng serve, and then to make element reveals, the events is fired, but the output in console is "undefined".

The log given by the failure

No log error

Desired functionality

I should have the element revealed.

Mention any other details that might be useful

[ritsrivastava01]

Facing the same issue, :(

[hassanrashidd]

Same issue. Can anyone please help? @tinesoft