If you use a strict content security policy using nonce and next.js, which uses dynamic rendering, does that mean you cannot cache pages?
#content security policy and ssr
distant cove
unique vergeBOT
Hi @distant cove. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave:
Hmm, I don't know enough to give you a confident answer yet. The information extracts provided do not contain specific details about the interaction between a strict content security policy using nonce and Next.js's dynamic rendering with respect to caching.
However, it's worth noting that Next.js does support various caching strategies including Full Route Cache, Data Cache, and client-side Router Cache. These can be used with dynamic rendering and can be opted out of if necessary. For more specific details about how these caching strategies interact with content security policies, you may want to refer to the Next.js documentation on caching (https://nextjs.org/docs/app/building-your-application/caching).
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distant cove
@unique verge How does next/config.js run? in a server environment or is it static?
unique vergeBOT
Let me check the knowledge base for you. One moment! :books:
The next.config.js file is a regular Node.js module that gets used by the Next.js server and build phases. It does not get included in the browser build. This means it runs in a server environment.
Here's an example of how you might structure your next.config.js:
/**
* @type {import('next').NextConfig}
*/
const nextConfig = {
/* config options here */
}
module.exports = nextConfig
If you need ECMAScript modules, you can use next.config.mjs:
/**
* @type {import('next').NextConfig}
*/
const nextConfig = {
/* config options here */
}
export default nextConfig
You can also use a function:
module.exports = (phase, { defaultConfig }) => {
/**
* @type {import('next').NextConfig}
*/
const nextConfig = {
/* config options here */
}
return nextConfig
}
Since Next.js 12.1.0, you can use an async function in your next.config.js file.
For more information, refer to the Next.js documentation on next.config.js (https://nextjs.org/docs/app/api-reference/next-config-js/pageExtensions).
Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:
distant cove
@unique verge how does the async headers() {
return [ work?
unique vergeBOT
Let me check the knowledge base for you. One moment! :books:
The headers() function in next.config.js is used to set custom HTTP headers for an incoming request on a given path. It's an asynchronous function that returns an array of objects, each representing a path and its associated headers.
Here's an example of how it works:
module.exports = {
async headers() {
return [
{
source: '/about',
headers: [
{
key: 'x-custom-header',
value: 'my custom header value',
},
{
key: 'x-another-custom-header',
value: 'my other custom header value',
},
],
},
]
},
}
In this example, the headers() function is returning an array with one object. This object has two properties: source and headers.
sourceis the incoming request path pattern. In this case, it's '/about'.headersis an array of response header objects, each withkeyandvalueproperties. These represent the custom headers that will be set for the '/about' path.
This function is asynchronous because it may need to perform some operations that take some time to complete, such as fetching data from a database or another API.
For more information, refer to the Next.js documentation on headers (https://nextjs.org/docs/app/api-reference/next-config-js/headers).
Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:
distant cove
@unique verge is this run during build?
unique vergeBOT
Let me check the knowledge base for you. One moment! :books:
No, the headers() function in next.config.js is not run during build time. It is run at request time on the server side. This means it executes each time a request is made to the server, allowing you to dynamically set headers based on the incoming request.