Get to know the technology we specialise in

Understanding the Basics of Express

Express, also known as Express.js, is a web application framework for Node.js, designed for building web applications and APIs. It was developed by TJ Holowaychuk and is maintained by the Node.js foundation and numerous open-source contributors. Express is a minimal, unopinionated, and flexible Node.js web application framework that provides a robust set of features for web and mobile applications. It is a crucial component of the MEAN stack, a popular software development stack that includes MongoDB, Express.js, AngularJS, and Node.js.

Express is a server-side or back-end web application framework, unlike AngularJS, which is a client-side or front-end framework. It simplifies the process of writing server code, instead of having to write a full server-side script from scratch. Express provides a simple interface to build websites, web apps, and APIs, making it a popular choice for software development services.

Exploring the Key Features and Benefits of Express

Express offers a myriad of features that make it a go-to framework for many developers. It provides a simple way to define routes, each with an HTTP verb (get, post, put, delete, etc.), a URL, and a function that’s called to handle that pattern. This makes it easy to define custom responses to different URL paths, a fundamental requirement for any web server. Express also includes middleware modules that can be used to perform additional tasks on request and response objects.

One of the key benefits of Express is its simplicity. It’s easy to learn, especially for those already familiar with Node.js. It’s also highly flexible and pluggable, allowing developers to choose from a wide range of Node.js modules. Express is also very fast, making it an excellent choice for high-performance applications. Its use in the MEAN stack alongside technologies like AngularJS and MongoDB makes it a popular choice for outsourcing software development.

Practical Applications and Best Practices in Express Development

Express is used in a wide range of applications, from small-scale projects to large-scale, complex applications. It’s often used in combination with other technologies in the MEAN stack to build dynamic websites and web apps. Express is also commonly used to build APIs, especially RESTful APIs, which are used to power single-page applications (SPAs) and mobile apps.

When developing with Express, it’s important to follow best practices to ensure the quality and maintainability of your code. This includes using middleware for error handling, using environment variables for configuration, and structuring your application into routes and controllers. It’s also recommended to use a linter like ESLint to enforce coding standards and catch potential errors.

Libraries of Express

Express has a rich ecosystem of libraries that extend its functionality. These include middleware libraries like body-parser for parsing HTTP request bodies, cookie-parser for parsing cookie data, and morgan for HTTP request logging. There are also libraries like express-session for session management and passport for authentication.

Other libraries provide integration with various technologies. For example, the express-react-views library allows you to use React components as views, while the express-handlebars library provides integration with the Handlebars templating engine. These libraries make Express a versatile tool in the arsenal of any software developer, whether they’re working on small projects or large-scale, outsourced projects.

Would you like to receive the updated list once per month?

Rafał Borecki


Let’s discuss the details of our collaboration. We are always available to assist you and address any inquiries you may have.

Lets talk

Discover your potential by using trusted and dedicated IT solutions