The following are the advantages of Node.js:
Node.js is open-source, which means it is free to use and does not require a license. Node.js also supports a wide range of open-source modules.
It uses JavaScript as a programming language for both the front and back ends, which boosts programmer productivity and code reuse.
You may grow your Node.js application in two ways: horizontally and vertically, allowing you to boost application performance.
It improves performance because Node.js I/O operations are non-blocking. It also uses the V8 JavaScript engine to run JavaScript code. The V8 engine translates JS code directly into machine code, making it faster.
Node.js enables module caching. As a result, the first time a Node.js module is requested, it is cached in the application's memory. Thus, further calls to load the same module may not result in the module code being executed again.
Node.js is based on JavaScript and can be executed both on the client and server side. It also allows for the sharing of data in JSON format, which JavaScript can readily consume. This makes it lightweight as compared to other frameworks.
You can easily create RESTful service APIs with Node.js.
It supports unit testing out of the box. You can use any JS unit testing framework, such as Jasmin, to test your Node.js code.
Node.js provides built-in APIs for creating many server types, including HTTP, DNS, and TCP servers.
Node.js has a large development community around the world. They are actively developing new modules or packages to enable various sorts of application development.
Limitations of Node.js are as follows:
Node.js runs on a single thread, which limits its ability to use multi-threaded programming to improve performance.
Node.js may struggle with operations that require significant processing resources, resulting in performance bottlenecks.
Because Node.js is single-threaded, long-running tasks might cause incoming requests to queue up while they wait for execution to complete.
While Node.js is excellent at completing synchronous tasks, particularly those involving I/O operations, it may not be optimal for CPU-intensive jobs.