![]() A cross-origin request is a request made from one domain to another domain. What are Cross-Origin Requests?īefore we delve into the solution, it’s important to understand what cross-origin requests are and why they are restricted by default. To resolve this error, you need to configure the server to include the “Access-Control-Allow-Origin” header in its response to the cross-origin request, specifying the domain(s) that are allowed to make XHR requests to that resource.Īlternatively, you can use a proxy server or JSONP (JSON with Padding) to bypass the cross-origin restriction, but these solutions may not be ideal depending on your specific use case. ![]() If the requesting domain is not listed in the header, the browser will block the request and throw the “No ‘Access-Control-Allow-Origin’ header is present” error. It specifies which domains are allowed to make XHR requests to a particular resource. The “Access-Control-Allow-Origin” header is a security feature implemented by web browsers to prevent cross-site scripting (XSS) attacks. The “No ‘Access-Control-Allow-Origin’ header is present” error occurs when a web page hosted on one domain tries to make a request to a resource on a different domain through an XMLHttpRequest (XHR) request, but the resource being requested does not include the necessary “Access-Control-Allow-Origin” header in its response. Why does the “No ‘Access-Control-Allow-Origin’ header is present” error occurs? ![]() If the header does not include “”, the browser will block the request. If the server at includes the ‘Access-Control-Allow-Origin’ header with a value of “”, the browser will allow the request to proceed. If the header does not allow the domain to make the request, the browser will block the request and display an error message.įor example, if a web page at includes an image from, the browser will make a request to to retrieve the image. If the header allows the domain to make the request, the browser will allow the request to proceed. When a browser makes a request to a web page, it checks to see if the server includes this header in the response. ![]() The ‘Access-Control-Allow-Origin’ header specifies which domains are allowed to access the resources on a web page. CORS is a security feature implemented by web browsers that prevents a web page from making requests to a different domain from the one that served the original web page. The ‘Access-Control-Allow-Origin’ header is an HTTP response header that is used to control cross-origin resource sharing (CORS) in web browsers. What is the ‘Access-Control-Allow-Origin’ header? This error message typically occurs when you’re making a cross-origin request from your website using jQuery, but the server hosting the requested resource is not configured to allow your website’s domain to access it. ![]()
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