How do I authenticate to the WooCommerce API using Javascript (Angular)?

I am attempting to create an AngularJS-based theme that is compatible with WooCommerce. I am pretty new to OAuth and that kind of thing, so I am having trouble figuring out how to authenticate my angular app with the wp api. I don’t want to expose the client secret in my javascript. Is there some way to authenticate through PHP and then access the data via JS?