Woocommerce API

Woocommerce API
Hi All,
I am using the woocommerce api that is now integrated with wordpress and have gone through the documentation for a while now. I am trying convert a woocommerce website to a native mobile app with Ionic Framework. I have followed the tutorial at https://apppresser.com/ionic-2-wordpress-wp-api/ and works fine for getting the posts from the website. All good here.

Now I am trying to do the same with woocommerce products to get the products listed. I have tried the oauth v1 because the data has to be safe from potential hackers. I get that. But how do you implement that in Javascript? I have referred to the documentation at
https://woocommerce.github.io/woocommerce-rest-api-docs/?javascript#authentication-over-http
and https://github.com/woocommerce/wc-api-node
What to do from here. I can’t get anywhere. I have added the package to the project as well but can’t seem to know how to implement it.
Any help would be appreciated.
Thanks.