What is the procedure for utilizing an edge function in Vercel to retain user input?

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Here are the steps to utilize an edge function in Vercel to retain user input:

1. Create an edge function: In the Vercel dashboard, go to the "Edge Functions" tab and create a new function. You can use any language that Vercel supports for edge functions, such as JavaScript or TypeScript.

2. Define the function logic: Write the code in your chosen language to retrieve and store user input. For example, you might use cookies or local storage to save user input and retrieve it later.

3. Configure the function: Specify when the function should run and how it should interact with your Vercel application. For example, you might configure the function to run on specific routes or in response to certain HTTP requests.

4. Deploy the function: After you're done writing and configuring the function, deploy it to Vercel by pushing it to a Git repository or uploading it directly to the Vercel dashboard.

5. Test the function: Verify that the function is working correctly by testing it against your Vercel application. You should be able to enter user input, navigate away from the page, and return to see that the input has been retained.

6. Monitor and optimize: Once the function is live, monitor its performance and make any necessary optimizations to ensure that it continues to work reliably and efficiently.