Comparison and distinction between Express and Koa2 in nodejs (detailed tutorial)

When it comes to Node.js development, we have to mention the two popular frameworks express and koa. Express has been around for a long time. It is a simple and flexible web development framework that is easy to use and powerful. Koa is relatively younger. It is an agile development framework redeveloped by the original team of Express framework based on the new features of ES6. It is now very popular and has great potential to catch up with Express.

I saw a question on the notice "Will Express be replaced by Koa2?" 》. I happened to have a little research on Express and koa, so I gave a brief answer.

1. Let’s talk about the conclusion first

There is currently no sign that Express will be replaced by koa2.

Currently, the Express ecosystem is more mature and the entry barrier is relatively low. In terms of download popularity on npm, the gap between the two is still large. Express's monthly downloads are about 40 times that of koa2.

However, the highlights of koa2 are attractive enough, and the ecology has begun to improve.

2. From the perspective of usage threshold

From the perspective of usage, Express is better for beginners. You can make something by modifying the official website.

The entry barrier for koa2 is higher than Express. A small problem brought about by a more streamlined kernel is that it requires users to have higher building block building skills. After all, even the core routing function has been removed.

Not to mention the most attractive async/await in koa2. Many beginners can’t understand promise. Async/await is confusing to use, and one of the most essential parts of koa2 is useless. .

3. In terms of general trends

After the node community grows, more and more students will participate in node server programming. By then, the requirements for server-side frameworks will become higher and higher, and it will be a battlefield for various enterprise-level solutions. The core is probably still based on Express or koa2, or others.

As for Express and koa2, they will continue to have a large market. I don’t know what the version will be at that time.

The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

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