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import { workAsyncStorage } from '../../app-render/work-async-storage.external'
import { workUnitAsyncStorage } from '../../app-render/work-unit-async-storage.external'
import { markCurrentScopeAsDynamic } from '../../app-render/dynamic-rendering'
/**
* This function can be used to declaratively opt out of static rendering and indicate a particular component should not be cached.
*
* It marks the current scope as dynamic.
*
* - In [non-PPR](https://nextjs.org/docs/app/api-reference/next-config-js/partial-prerendering) cases this will make a static render
* halt and mark the page as dynamic.
* - In PPR cases this will postpone the render at this location.
*
* If we are inside a cache scope then this function does nothing.
*
* @note It expects to be called within App Router and will error otherwise.
*
* Read more: [Next.js Docs: `unstable_noStore`](https://nextjs.org/docs/app/api-reference/functions/unstable_noStore)
*/
export function unstable_noStore() {
const callingExpression = 'unstable_noStore()'
const store = workAsyncStorage.getStore()
const workUnitStore = workUnitAsyncStorage.getStore()
if (!store) {
// This generally implies we are being called in Pages router. We should probably not support
// unstable_noStore in contexts outside of `react-server` condition but since we historically
// have not errored here previously, we maintain that behavior for now.
return
} else if (store.forceStatic) {
return
} else {
store.isUnstableNoStore = true
if (workUnitStore) {
switch (workUnitStore.type) {
case 'prerender':
case 'prerender-client':
// unstable_noStore() is a noop in Dynamic I/O.
return
case 'prerender-ppr':
case 'prerender-legacy':
case 'request':
case 'cache':
case 'private-cache':
case 'unstable-cache':
break
default:
workUnitStore satisfies never
}
}
markCurrentScopeAsDynamic(store, workUnitStore, callingExpression)
}
}
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