To preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. CORS Error: 'No 'Access-Control-Allow-Origin' header is present on the requested resource' (Doc ID 2333853.1). Free download nvu for mac. Last updated on OCTOBER.

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Const url = '// site that doesn’t send Access-Control-.fetch(url).then(response = response.text).then(contents = console.log(contents)).catch( = console.log('Can’t access ' + url + ' response. Blocked by browser?' ))The reason the catch block gets hit there is, the browser prevents that code from accessing the response which comes back from And the reason the browser does that is, the response lacks the Access-Control-Allow-Origin response header.Now, here’s exactly the same example but just with a CORS proxy added in. Const proxyurl = 'url = '// site that doesn’t send Access-Control-.fetch(proxyurl + url) // = response.text).then(contents = console.log(contents)).catch( = console.log('Can’t access ' + url + ' response. Blocked by browser?' This error occurs when the client URL and server URL don't match, including the port number. In this case you need to enable your service for CORS which is cross origin resource sharing.If you are hosting a Spring REST service then you can find it in the blog post.If you are hosting a service using a Node.js server then.

Stop the Node.js server. npm install cors -save.Add following lines to your server.js var cors = require('cors')app.use(cors) // Use this after the variable declaration.