Express JS Vs Koa JS

~welcome back with another post…

Express JS and Koa JS both are Web application frameworks for Node JS.

Let’s brief them individually first…

Express JS

Express JS is a Node JS web application framework which has developed by Holowaychuk in November 2010. It is a free and open source software which is licensed under MIT.

Koa JS

Koa JS is also a web application framework for Node JS which has designed by the team behind Express. It provides robust features to develop web applications and API.

Express JS Vs Koa JS

Routing

Express JS includes routing and templates in the application framework while Koa JS requires modules like Koa-routing for routing.

Performance

Koa has great performance because we can stop using callbacks and deal with errors faster. So the Koa wins over Express when the performance factor is considered.

Lightweight

Koa is very lightweight framework when compared to Express. Express has switch or view motor modules Whereas Koa does not have such modules.

Popularity

Express is the most popular and accepted node JS web application framework. Therefore Express is used more than Koa.

Let’s see when we can use Express over Koa & vice versa…

• When to use Express over Koa

— When the developing application is browser-based and help with routing and templating are needed.

— When there is a new team of developers who require more documentation from the community.

• When to use Koa over Express

— When the application is not browser-based and routing & templating support is not needed.

— When a lightweight application is needed to increase the performance.

Conclusion

We just briefly learned few differences between Express JS and Koa JS.

That’s it for now, and please press the clap button if you find this article helpful.