Jquery - Using top.location.pathname for multiple paths?

I'm trying to have a jquery function run if the url is on a couple distinct paths, particularly the index and the root. Right now, I have

"if (top.location.pathname === '/','index.html')
{ 
function happens
}

It works if I have only one pathname at the top but I don't know the syntax for having two. I'm also likely going to do something with the opposite, like:

"if (!top.location.pathname === '/','index.html')
{ 
function happens
}

Couldn't find anywhere online that explained this! I'm mostly self taught so if this is simple to do go easy on me, lol.