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features
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support

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Description

Koa is an innovative web framework developed by the creators of Express, intended to serve as a more compact, expressive, and sturdy base for web applications and APIs. By utilizing async functions, Koa eliminates the need for callbacks, significantly enhancing error management. Unlike other frameworks, Koa does not include any bundled middleware in its core, instead offering a refined set of methods that facilitate fast and enjoyable server development. A Koa application is essentially an object that holds an array of middleware functions, which are then composed and executed sequentially in a stack-like manner when a request is made. While Koa shares similarities with various middleware systems, such as Ruby's Rack and Connect, it distinguishes itself by incorporating high-level "sugar" into the otherwise low-level middleware layer. This thoughtful design choice not only boosts interoperability and robustness but also enriches the overall experience of writing middleware. Additionally, Koa's focus on simplicity and flexibility empowers developers to create tailored solutions specific to their application needs.

Description

Starlette features an application class known as Starlette, which effectively integrates all its various functionalities. It utilizes a predefined list of middleware that executes with each incoming request. Notably, a Starlette application inherently incorporates two middleware classes: ServerErrorMiddleware, which serves as the outermost layer to catch any uncaught errors that may arise throughout the entire processing stack, and ExceptionMiddleware, positioned as the innermost layer to manage exceptions that are handled within the routing or endpoint logic. Both startup and shutdown handler callables are designed not to accept any parameters and can be implemented as either standard or asynchronous functions, allowing for flexibility in deployment. This structure ensures that developers can maintain robust error handling and lifecycle management within their applications.

API Access

Has API Yes 

API Access

Has API No 

Screenshots View All

Screenshots View All

Integrations

AppSignal Yes 
Forest Yes 
Idealogic Yes 
New Relic Yes 
NocoBase Yes 
Node.js Yes 
Python No 
Syhunt Hybrid Yes 

Integrations

AppSignal Yes 
Forest No 
Idealogic No 
New Relic No 
NocoBase No 
Node.js No 
Python Yes 
Syhunt Hybrid No 

Pricing Details

Free
Free Trial No 
Free Version Yes 

Pricing Details

No price information available.
Free Trial No 
Free Version No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App Yes 
iPad App Yes 
Android App Yes 
Windows Yes 
Mac Yes 
Linux Yes 
Chromebook Yes 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Vendor Details

Company Name

Koa

Website

koajs.com

Vendor Details

Company Name

Starlette

Website

www.starlette.io

Product Features

Alternatives

Alternatives

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Express

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Express Reviews

Express

OpenJS Foundation