Koa Js

The team behind Express has created Koa, a modern web architecture that aims to be a smaller, more expressive, and more stable base for mobile applications and APIs. Koa helps you to eliminate callbacks and significantly improve error management by using generators. Koa does not package any middleware inside core, and provides an elegant suite of methods that make writing servers fast.

Features of Koa Js

• Koa.js is a cutting-edge, future-proof framework. Unlike other Node.js systems, Koa.js is built using ES6, which simplifies the construction of complex applications by including a slew of new classes and modules. This aids developers in the development of maintainable software.
• Koa.js makes use of ES6 generators to make synchronous programming easier and the flow of controls more fluid. These generators can also be used to manage the execution of code on the same stack as functions.
• In comparison to other Node.js implementations, Koa.js has a minimal footprint. This makes it easier for developers to create middleware that is smaller and lighter.
• Koa.js has a built-in error catchall to help avoid website crashes.

Advantages and disadvantages of koa js

Advantages:

• Generator support from ground up Using generators (a bleeding edge feature, even for Node.js) would clean up your code from the mess caused by all those callbacks; making your code more manageable.
• Development team has a proven track record
• Koa is developed by the team behind a widely used node.js framework (express.js).
• Extremely lightweight
• Koa is very lightweight with just 550 lines of code.
• sync/await keywords are supported and has transcended beyond generator functions
• Generators functions are of course a huge plus, but at the time Koa team has transcended generations functions and shifted towards async/await style programming. It has made the Koa best framework available in the market.

Disadvantages:

• Community is relatively small.
• Not compatible with express style middleware.
• Koa uses generators which are not compatible with any other type of Node.js framework middleware.