Having trouble for migrating to ionic 4

Hello everyone, i’m actually trying to migrate a project for epub (https://github.com/janpio/ionic-epubjs) to ionic V4 but it does not work

Can someone help me please.

Quel est le probleme?
J’ai migré un projet et ça fonctionne chez moi

Hola, ¿cual sería exactamente tu problema?

I think the push ans pop fonction does not work, i tried to update the project mentionned because installing epubjs with node doesnt seem tout work

here you will find the routing to put in place of push or pop