Express is a flexible backend web application framework for Node JS. It is used for building single pages, multiple pages, and hybrid applications. It gives a powerful set of features for mobile and Web applications such as HTTP helpers, content negotiation, and high test coverage. It helps in the quick development of node-based web applications. Express is frequently used as it is ultra-fast and asynchronous in nature
There are many libraries for unit testing in NodeJS applications. Jest is a powerful way for having access to the test runner and assertion library for the Node JS applications. It is a simple Javascript testing framework. Here we can make tests that keep track of large objects with ease. Jest’s entire toolkit is well documented and well maintained. The main advantage of Jest is that it supports all types of mocking
TypeScript is an open-source language developed by Microsoft. It is a superset of Javascript. Typescript supports static typing and type checking. This helps to write server-side applications without run-time type errors. Typescript is considered to be a great language to support Node JS functionality as it helps to build high-level applications
