Our great sponsors
-
SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
You can use the popular API development and testing tool Postman to test CORS. It enables you to create HTTP requests and specify custom headers to test CORS configurations. Postman can also automatically generate preflight requests to test preflight request caching. Use Postman's scripting capabilities to automate test scenarios, too.
Node.js (version 18.16.1 is recommended)
In this section, we’ll walk through a secure implementation of CORS in a Node.js application. We’ll consider a simple Node.js application using Express.js as its web framework. It will serve as an API for a hypothetical online bookstore.