How do I configure CORS options in Express.js?
An example of an AI chatbot conversation about configuring CORS in Express.js.
How do I configure CORS options in Express.js?
To configure CORS in Express.js, you can use the 'cors' middleware. First, install it using npm.
What are the common options I can set for CORS?
Common options include 'origin', 'methods', 'allowedHeaders', and 'exposedHeaders'. You can customize them as needed.
Can I allow requests from multiple origins?
Yes, you can set the 'origin' option to an array of allowed origins or use a function to dynamically check the origin.
How do I handle preflight requests?
Preflight requests are automatically handled by the 'cors' middleware. Just ensure it's included in your middleware stack.
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