For the past few years, Node.js, accounting for its growth and popularity, has been a talking point for some time now. Well-establish companies like Walmart and PayPal have adapted it, making it one of the most recognized languages at present. However, as many other platforms, Node.js faces a lot of development problems that includes crucial mistakes committed by the developers themselves. This article details out the top 5 common mistakes that the developers are guilty of committing often.
Blocking The Event Loop
Being a single-threaded environment, Node.js makes sure that, no part of run in a parallel. To achieve the concurrency I/O bound operations are handled asynchronously. But this leads to the blocking of the event loop as thousands of clients are connected to it. There is no a clear-cut solution to this problem, other than to address each case individually.
Initiating Multiple Callbacks
Deeper Nesting Of Callbacks
Nesting callback so deep is not exactly a Node.js issue, but may cause problems, making the code spin out of control in a short span of time. It gets worse with the complexity of the task. Nesting callbacks in this way will end up with a hard-to-read, hard-to-maintain and error-filled code. One feasible solution is to declare these tasks as small functions and then later link them all up.
Assuming The Callbacks Will Run Synchronously
Not Testing The Application Enough
Assuming that the application is “done” before running multiple tests on them is considered as a cardinal sin. With the availability of multiple testing tools at the disposal of the developers, there is really no excuse for not testing.
By now, it's clear that these mistakes may cause devastating effects on the program. Node.js had made it extremely easy for beginners to learn and get started, but there are areas, where things can be easily messed up. Avoiding these crucial mistakes will let the developers to extract all the advantages, Node.js has to offer.