Thank you for your help. I started with a from scratch angularjs project. I injected incrementaly the jquery plugins. everything works well.
Except 2 problems that I want to get rid of:
1 – when the page starts the images have a gray state and after this they apear with a fade effect. Sometimes they get trapped in the gray states (image 1 attached). I wanted to know where do I change this effect and even remove it.
2 – when I’m on my phone sometimes on the portrait vision / normale vision, the hero images appear very big ( Image 2 ): not adapted to the screen.