What is the method of interaction between Uniapp and the back-end?

Uniapp is a cross-platform development framework based on Vue.js, which can be used to develop applications for multiple platforms including mini programs, H5, and Apps. There are several methods for interacting with the backend in Uniapp.

1. Uniapp comes with Vue’s HTTP request library, axios, which allows users to send HTTP requests and interact with the backend for data exchange. Sending requests in pages using axios can be done using common methods such as GET, POST, PUT, DELETE, etc.
2. Uniapp provides built-in network request APIs such as uni.request and uni.uploadFile, which can be directly used to interact with the backend. These APIs offer various configuration options for setting the URL, request headers, request parameters, etc.
3. Uniapp supports real-time communication with the backend using WebSocket. You can establish a connection with the backend using a WebSocket object and transfer data by listening for messages and sending messages.
4. By utilizing plugins, Uniapp supports the integration of third-party plugins, such as uni-socket.io, specifically designed for interacting with the backend. These plugins can streamline the process of backend interaction, providing a more convenient API.

It is necessary to choose the appropriate method to interact with the backend based on specific requirements, and make corresponding configurations and handling in the code.