expressjs cors blocked mixed-content

First, let's understand the issue. When a web application served over HTTPS tries to access resources from a server that is using HTTP, it's considered "mixed content." This can lead to security issues, and modern browsers tend to block such requests.

To address this in an Express.js application, you can use the 'cors' package to enable Cross-Origin Resource Sharing (CORS) support. Here are the steps:

1. Install the 'cors' package using npm or yarn.
2. Import the 'cors' package in your Express application.
3. Use the 'cors' middleware in your application by calling the method and passing in the appropriate options, such as specifying the origin that is allowed to access the resources.
4. Make sure that the resources being accessed are served over HTTPS to avoid mixed-content issues.

By following these steps, you can effectively enable CORS support in your Express.js application and mitigate mixed-content blocking.