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Koa is a next generation web framework for Node.js, designed by the team behind Express, which aims to be a smaller, more expressive, and more robust foundation for web applications and APIs. Koa uses async functions to eliminate callback hell and greatly improve error handling. Koa does not bundle any middleware within its core, and it provides an elegant suite of methods that make writing servers fast and enjoyable.
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Website Key Features
Async/Await Support
Koa is built around async/await, making it easier to write asynchronous code without callbacks.
Lightweight
Koa is very lightweight with only about 550 lines of code, making it more performant and easier to understand.
Modular Design
Koa's middleware stack flows in a stack-like manner, allowing you to perform actions downstream then filter and manipulate the response upstream.
Improved Error Handling
Koa improves error handling by using try/catch blocks around middleware, making it easier to catch and handle errors.
No Callback Hell
By using async functions, Koa eliminates the need for callbacks, thus avoiding callback hell.
Context Encapsulation
Koa encapsulates the request and response objects into a single object, providing a simpler API for web server development.
Extensible
Koa is highly extensible, allowing developers to add their own properties and methods to the context object.
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Additional information
Creator
Koa was created by the team behind Express, aiming to be a more modern and robust framework.
License
Koa is released under the MIT license, making it free to use, modify, and distribute.
Community
Koa has a growing community of developers contributing to its ecosystem, including middleware and plugins.
Performance
Koa is known for its high performance, especially in handling asynchronous operations, making it suitable for building scalable web applications.
Compatibility
Koa requires Node.js 7.6.0 or higher for ES2015 and async function support.
HTTP headers
Security headers report is a very important part of user data protection. Learn more about http headers for koa.com