Can Hologram leak data

I have been working mostly on liveview or other server driven frameworks. I have one question.

Can hologram leak unwanted data?

For example lets say a user struct contains name, profile_picture, email and mobile.
I have a UserAvatar component that generates user avatars using name and profile_picture.

Now if I pass the whole user struct to it

<UserAvatar user={@user} /> 

will the email and mobile also get passed down to the browser.
While they might not be directly visible in the template, but can someone see the other details by changing the js in browser.

Please advise.

P.S: I am exploring hologram and so far it looks pretty good. The action and command system is simple and powerful. Thanks.