How do I get the web app that I coded in HTML5 CSS and javascrip to display the images and videos?

Question

I coded an web app in HTML5 CSS and javascript and it works perfectly on my simulator but when i install it on my phone the photos and videos are not showing and I don't know why that is.

Answer 1

Please clarify your question.
1) What do you mean with "simulator"?
2) How are you installing an app that was made with HTML? It is a web app then, no installation is needed, you just open it with a browser.

Answer 2

it's a web application .
The simulator is an application that allows my webapp to be read as if it were on my phone.