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Handle server context being refreshed #38580

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merged 2 commits into from Jul 13, 2022
Merged

Handle server context being refreshed #38580

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8a5a67f
Handle server context being refreshed
timneutkens Jul 13, 2022
252f67f
Merge branch 'canary' into fix/server-context-hmr
kodiakhq[bot] Jul 13, 2022
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28 changes: 22 additions & 6 deletions packages/next/client/components/hooks-server-context.ts
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@@ -1,9 +1,25 @@
// @ts-expect-error createServerContext exists on experimental channel
import { createServerContext } from 'react'

export const HeadersContext = createServerContext('HeadersContext', null)
export const PreviewDataContext = createServerContext(
'PreviewDataContext',
null
)
export const CookiesContext = createServerContext('CookiesContext', null)
// Ensure serverContext is not created more than once as React will throw when creating it more than once
// https://github.com/facebook/react/blob/dd2d6522754f52c70d02c51db25eb7cbd5d1c8eb/packages/react/src/ReactServerContext.js#L101
const createContext = (name: string) => {
// @ts-expect-error __NEXT_DEV_SERVER_CONTEXT__ is a global
if (!global.__NEXT_DEV_SERVER_CONTEXT__) {
// @ts-expect-error __NEXT_DEV_SERVER_CONTEXT__ is a global
global.__NEXT_DEV_SERVER_CONTEXT__ = {}
}

// @ts-expect-error __NEXT_DEV_SERVER_CONTEXT__ is a global
if (!global.__NEXT_DEV_SERVER_CONTEXT__[name]) {
// @ts-expect-error __NEXT_DEV_SERVER_CONTEXT__ is a global
global.__NEXT_DEV_SERVER_CONTEXT__[name] = createServerContext(name, null)
}

// @ts-expect-error __NEXT_DEV_SERVER_CONTEXT__ is a global
return global.__NEXT_DEV_SERVER_CONTEXT__[name]
}

export const HeadersContext = createContext('HeadersContext')
export const PreviewDataContext = createContext('PreviewDataContext')
export const CookiesContext = createContext('CookiesContext')