on github pages can't read a function

[Aline89b]

Hello,
I 'm trying to deploy an app with webpack on github pages but i can't understand why it shows properly but then doesnt read a function on a click. it works ok locally

here is my repo https://github.com/Aline89b/library
and my github page https://aline89b.github.io/library/

thanks