Create a simple CORS proxy with Cloudflare Workers to bypass CORS restrictions in the browser. Perfect for local development.

index.js

/**
 * Create a simple CORS proxy with Cloudflare Workers 
 * to bypass cors restrictions in the browser.
 * Example Usage: https://<worker_subdomain>.workers.dev/https://postman-echo.com/get?foo1=bar1&foo2=bar2
 */

addEventListener('fetch', event =>
	event.respondWith(handleRequest(event.request))
)

const handleRequest = async request => {
	let url = new URL(request.url)
    let requestUrl = request.url.replace(`${url.origin}/`, '');
	request = new Request(requestUrl, request)
	if (request.headers.has('origin')) request.headers.delete('origin')
	if (request.headers.has('referer')) request.headers.delete('referer')
	let response = await fetch(request)
	response = new Response(response.body, response)
	response.headers.set('access-control-allow-origin', '*')
	response.headers.set('access-control-allow-headers', '*')
	return response
}