The REST architectural style is designed for network-based applications, specifically client-server applications. But more than that, it is designed for Internet-scale usage, so the coupling between the user agent (client) and the origin server must be as lightweight (loose) as possible to facilitate large-scale adoption. This is achieved by creating a layer of abstraction on the server by defining resources that encapsulate entities (e.g. files) on the server and so hiding the underlying implementation details (file server, database, etc.). Clients can only access resources using URIs. In other words, the client requests a resource using a URI and the server responds with a representation of the resource. Wikipedia

In other words, REST is a conception of interaction between independent objects using the HTTP protocol. It includes a set of principles, recommendations for client-server applications on how to interact. Usually, the answer receives in JSON format.

API is an interface of interaction with objects. It includes a set of interaction rules covering creating, reading, updating and deleting operations.

REST API allows the app to interact with objects using REST conceptions.

The task was to develop a filter tool for the website. The filter tool must filter products depending on the user’s answers. The buyer should answer five questions to pick the best product for him.

I chose the technologies and languages to realize the project: PHP, JavaScript, Vue, Vuex, axios.