has-cors

What is has-cors?

The has-cors npm package is a simple utility to check if the browser or environment supports Cross-Origin Resource Sharing (CORS). It is primarily used in web development to determine if CORS is enabled in the user's environment, which is crucial for making cross-origin requests in web applications.

What are has-cors's main functionalities?

Check CORS support

This feature allows developers to programmatically check if the current browser or environment supports CORS. The package exports a boolean value indicating the presence of CORS support. This is useful for conditionally enabling or disabling functionality based on CORS availability.

var hasCORS = require('has-cors');

console.log(hasCORS); // Outputs: true or false

Other packages similar to has-cors

cors

Unlike has-cors, which is used for checking if CORS is supported, the 'cors' package is a middleware that can be used to enable CORS with various options. It is more comprehensive and is typically used in Node.js applications to set up CORS policies.

cross-fetch

While not directly similar to has-cors, 'cross-fetch' provides a way to make cross-origin requests in both browser and Node.js environments. It's a polyfill for the Fetch API that supports CORS, but it doesn't offer functionality to check for CORS support.

README

has-cors

Detects support for Cross-Origin Resource Sharing

Installation

Install with component(1):

$ component install component/has-cors

API

Exports true if the user-agent supports CORS, or false otherwise.

var hasCORS = require('has-cors');
console.log(hasCORS);
// true

License

MIT