Node.JS is a great platform which has a an attractive ecosystem and a good package manager.Basically it flies on the popularity of Java Script.But there are still some points where it falls short even within its own domain.
Unstable Application Program Interface
Lot programmers have complained that the API keeps changing at frequent intervals.sometimes the newer api comes with a number of backward incompatible changes and these changes makes it a necessity for the programmers to make changes to the existing code base to make it compatible with the latest version of node.js api.
Lack of Libraries
Unlike other programming languages, JavaScript lacks a strong standard library.The users do not have any option to avail common libraries for image processing,object relational mapping (ORM),database operations,XML parsing and s3 client.This is due to the fact that JavaScript hasn’t enjoyed the popularity on the server side.Many developers even find the available JavaScript to be unstable and inadequate.Hence developers often find it difficult to accomplish common programming tasks while using node.js
String-typed programming
Many programmers in the community feel that strings are easy which leads to bugs due to unnecessary reliance on strings,rather than proper data structures.Since its a cultural thing and JavaScript doesn’t itself do much to make the alternatives be percieved as earlier, it makes it even harder to third party libraries.
Asynchronous programming Models
To enhance it capabilities, node.js requires the programmers to use an asynchronous programming approach.Many programmers find it difficult than the linear blocking I/O programming.Also this model makes the code look very much messy and compels coders to rely on nested callbacks.
Inappropriate for Complex Web applications:
Node.js does not support multi threaded programming.Actually it queues the incoming requests and executes them sequentially at the time of processing long running tasks.The process increases the time required by an application to respond to the user request.Many programmers also find it difficult to use the run time environment for the computational intensive tasks.
Though there are some drawbacks of node.js,several features of it will help in creating wide range of networking and server side applications.
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