Directive Hide Fab not working with Lazy loading

Ionic Framework ionic-v3
1

My problem is that I followed a tutorial to hide a floating button and it does not work because of the lazy loading. Here is the link of the tutorial: http://pointdeveloper.com/ionic-hide-floating-action-button-fab-scroll/
how can i adjust this please?

2

I would contact the tutorial author for assistance. It looks like there might be something that needs to changed in the custom directive.

3

thanks for your comment.
I sent a message to the author for an update of his tutorial.