koajs@koa/cors
Cross-Origin Resource Sharing(CORS) for koa
Installation
$ npm install @koa/cors@2 --saveQuick start
Enable cors with default options:
- origin: request Origin header
- allowMethods: GET,HEAD,PUT,POST,DELETE,PATCH
const Koa = require('koa');
const cors = require('@koa/cors');
const app = new Koa();
app.use(cors());cors(options)
/**
* CORS middleware
*
* @param {Object} [options]
* - {String|Function(ctx)} origin `Access-Control-Allow-Origin`, default is request Origin header
* - {String|Array} allowMethods `Access-Control-Allow-Methods`, default is 'GET,HEAD,PUT,POST,DELETE,PATCH'
* - {String|Array} exposeHeaders `Access-Control-Expose-Headers`
* - {String|Array} allowHeaders `Access-Control-Allow-Headers`
* - {String|Number} maxAge `Access-Control-Max-Age` in seconds
* - {Boolean} credentials `Access-Control-Allow-Credentials`
* - {Boolean} keepHeadersOnError Add set headers to `err.header` if an error is thrown
* @return {Function} cors middleware
* @api public
*/