Serialize Promises through Flight #26086
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This ensures that we can synchronously resolve promises vendored by Flight. Currently, we don't attach listeners until later if the promise is already instrumented. Flight promises wait to resolve its content until .then() is called. Therefore it's never synchronously available in Fiber. This fixes that by ensuring that we always call .then() and then checking if we can eagerly resolve it.
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This lets you pass Promises from server components to client components and `use()` them there. We still don't support Promises as children on the client, so we need to support both. This will be a lot simpler when we remove the need to encode children as lazy since we don't need the lazy encoding anymore then. I noticed that this test failed because we don't synchronously resolve instrumented Promises if they're lazy. The second fix calls `.then()` early to ensure that this lazy initialization can happen eagerly. ~It felt silly to do this with an empty function or something, so I just did the attachment of ping listeners early here. It's also a little silly since they will ping the currently running render for no reason if it's synchronously available.~ EDIT: That didn't work because a ping might interrupt the current render. Probably need a bigger refactor. We could add another extension but we've already taken a lot of liberties with the Promise protocol. At least this is one that doesn't need extension of the protocol as much. Any sub-class of promises could do this. DiffTrain build for [9d111ff](9d111ff) [View git log for this commit](https://github.com/facebook/react/commits/9d111ffdfbcfee4b348a3d49c16f02cb718c896f)
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Summary: This sync includes the following changes: - **[86c8c8db7](facebook/react@86c8c8db7 )**: test: Don't retry flushActWork if flushUntilNextPaint threw ([#26121](facebook/react#26121)) //<Sebastian Silbermann>// - **[64acd3918](facebook/react@64acd3918 )**: remove unguarded getRootNode call ([#26152](facebook/react#26152)) //<Josh Story>// - **[71cace4d3](facebook/react@71cace4d3 )**: Migrate testRunner from jasmine2 to jest-circus ([#26144](facebook/react#26144)) //<Ming Ye>// - **[c8510227c](facebook/react@c8510227c )**: Treat displayName as undefined ([#26148](facebook/react#26148)) //<Sebastian Markbåge>// - **[55542bc73](facebook/react@55542bc73 )**: Update jest printBasicPrototype config ([#26142](facebook/react#26142)) //<Ming Ye>// - **[6396b6641](facebook/react@6396b6641 )**: Model Float on Hoistables semantics ([#26106](facebook/react#26106)) //<Josh Story>// - **[ef9f6e77b](facebook/react@ef9f6e77b )**: Enable passing Server References from Server to Client ([#26124](facebook/react#26124)) //<Sebastian Markbåge>// - **[35698311d](facebook/react@35698311d )**: Update jest escapeString config ([#26140](facebook/react#26140)) //<Ming Ye>// - **[6ddcbd4f9](facebook/react@6ddcbd4f9 )**: [flow] enable LTI inference mode ([#26104](facebook/react#26104)) //<Jan Kassens>// - **[53b1f69ba](facebook/react@53b1f69ba )**: Implement unstable_getBoundingClientRect in RN Fabric refs ([#26137](facebook/react#26137)) //<Rubén Norte>// - **[594093496](facebook/react@594093496 )**: Update to Jest 29 ([#26088](facebook/react#26088)) //<Ming Ye>// - **[28fcae062](facebook/react@28fcae062 )**: Add support for SVG `transformOrigin` prop ([#26130](facebook/react#26130)) //<Aravind D>// - **[3ff1540e9](facebook/react@3ff1540e9 )**: Prefer JSX in ReactNoop assertions (to combat out-of-memory test runs) ([#26127](facebook/react#26127)) //<Sebastian Silbermann>// - **[01a0c4e12](facebook/react@01a0c4e12 )**: Add Edge Server Builds for workerd / edge-light ([#26116](facebook/react#26116)) //<Sebastian Markbåge>// - **[f0cf832e1](facebook/react@f0cf832e1 )**: Update Flight Fixture to "use client" instead of .client.js ([#26118](facebook/react#26118)) //<Sebastian Markbåge>// - **[03a216070](facebook/react@03a216070 )**: Rename "dom" fork to "dom-node" and "bun" fork to "dom-bun" ([#26117](facebook/react#26117)) //<Sebastian Markbåge>// - **[4bf2113a1](facebook/react@4bf2113a1 )**: Revert "Move the Webpack manifest config to one level deeper ([#26083](facebook/react#26083))" ([#26111](facebook/react#26111)) //<Sebastian Markbåge>// - **[2ef24145e](facebook/react@2ef24145e )**: [flow] upgrade to 0.199.0 ([#26096](facebook/react#26096)) //<Jan Kassens>// - **[922dd7ba5](facebook/react@922dd7ba5 )**: Revert the outer module object to an object ([#26093](facebook/react#26093)) //<Sebastian Markbåge>// - **[9d111ffdf](facebook/react@9d111ffdf )**: Serialize Promises through Flight ([#26086](facebook/react#26086)) //<Sebastian Markbåge>// - **[0ba4698c7](facebook/react@0ba4698c7 )**: Fix async test in React reconciler ([#26087](facebook/react#26087)) //<Ming Ye>// - **[8c234c0de](facebook/react@8c234c0de )**: Move the Webpack manifest config to one level deeper ([#26083](facebook/react#26083)) //<Sebastian Markbåge>// - **[977bccd24](facebook/react@977bccd24 )**: Refactor Flight Encoding ([#26082](facebook/react#26082)) //<Sebastian Markbåge>// - **[d7bb524ad](facebook/react@d7bb524ad )**: [cleanup] Remove unused package jest-mock-scheduler ([#26084](facebook/react#26084)) //<Ming Ye>// - **[6b3083266](facebook/react@6b3083266 )**: Upgrade prettier ([#26081](facebook/react#26081)) //<Jan Kassens>// - **[1f5ce59dd](facebook/react@1f5ce59dd )**: [cleanup] fully roll out warnAboutSpreadingKeyToJSX ([#26080](facebook/react#26080)) //<Jan Kassens>// Changelog: [General][Changed] - React Native sync for revisions 48b687f...fccf3a9 jest_e2e[run_all_tests] Reviewed By: rubennorte Differential Revision: D43305607 fbshipit-source-id: 8da7567ca2a182f4be27788935c2da30a731f83b
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Summary: This sync includes the following changes: - **[86c8c8db7](facebook/react@86c8c8db7 )**: test: Don't retry flushActWork if flushUntilNextPaint threw ([facebook#26121](facebook/react#26121)) //<Sebastian Silbermann>// - **[64acd3918](facebook/react@64acd3918 )**: remove unguarded getRootNode call ([facebook#26152](facebook/react#26152)) //<Josh Story>// - **[71cace4d3](facebook/react@71cace4d3 )**: Migrate testRunner from jasmine2 to jest-circus ([facebook#26144](facebook/react#26144)) //<Ming Ye>// - **[c8510227c](facebook/react@c8510227c )**: Treat displayName as undefined ([facebook#26148](facebook/react#26148)) //<Sebastian Markbåge>// - **[55542bc73](facebook/react@55542bc73 )**: Update jest printBasicPrototype config ([facebook#26142](facebook/react#26142)) //<Ming Ye>// - **[6396b6641](facebook/react@6396b6641 )**: Model Float on Hoistables semantics ([facebook#26106](facebook/react#26106)) //<Josh Story>// - **[ef9f6e77b](facebook/react@ef9f6e77b )**: Enable passing Server References from Server to Client ([facebook#26124](facebook/react#26124)) //<Sebastian Markbåge>// - **[35698311d](facebook/react@35698311d )**: Update jest escapeString config ([facebook#26140](facebook/react#26140)) //<Ming Ye>// - **[6ddcbd4f9](facebook/react@6ddcbd4f9 )**: [flow] enable LTI inference mode ([facebook#26104](facebook/react#26104)) //<Jan Kassens>// - **[53b1f69ba](facebook/react@53b1f69ba )**: Implement unstable_getBoundingClientRect in RN Fabric refs ([facebook#26137](facebook/react#26137)) //<Rubén Norte>// - **[594093496](facebook/react@594093496 )**: Update to Jest 29 ([facebook#26088](facebook/react#26088)) //<Ming Ye>// - **[28fcae062](facebook/react@28fcae062 )**: Add support for SVG `transformOrigin` prop ([facebook#26130](facebook/react#26130)) //<Aravind D>// - **[3ff1540e9](facebook/react@3ff1540e9 )**: Prefer JSX in ReactNoop assertions (to combat out-of-memory test runs) ([facebook#26127](facebook/react#26127)) //<Sebastian Silbermann>// - **[01a0c4e12](facebook/react@01a0c4e12 )**: Add Edge Server Builds for workerd / edge-light ([facebook#26116](facebook/react#26116)) //<Sebastian Markbåge>// - **[f0cf832e1](facebook/react@f0cf832e1 )**: Update Flight Fixture to "use client" instead of .client.js ([facebook#26118](facebook/react#26118)) //<Sebastian Markbåge>// - **[03a216070](facebook/react@03a216070 )**: Rename "dom" fork to "dom-node" and "bun" fork to "dom-bun" ([facebook#26117](facebook/react#26117)) //<Sebastian Markbåge>// - **[4bf2113a1](facebook/react@4bf2113a1 )**: Revert "Move the Webpack manifest config to one level deeper ([facebook#26083](facebook/react#26083))" ([facebook#26111](facebook/react#26111)) //<Sebastian Markbåge>// - **[2ef24145e](facebook/react@2ef24145e )**: [flow] upgrade to 0.199.0 ([facebook#26096](facebook/react#26096)) //<Jan Kassens>// - **[922dd7ba5](facebook/react@922dd7ba5 )**: Revert the outer module object to an object ([facebook#26093](facebook/react#26093)) //<Sebastian Markbåge>// - **[9d111ffdf](facebook/react@9d111ffdf )**: Serialize Promises through Flight ([facebook#26086](facebook/react#26086)) //<Sebastian Markbåge>// - **[0ba4698c7](facebook/react@0ba4698c7 )**: Fix async test in React reconciler ([facebook#26087](facebook/react#26087)) //<Ming Ye>// - **[8c234c0de](facebook/react@8c234c0de )**: Move the Webpack manifest config to one level deeper ([facebook#26083](facebook/react#26083)) //<Sebastian Markbåge>// - **[977bccd24](facebook/react@977bccd24 )**: Refactor Flight Encoding ([facebook#26082](facebook/react#26082)) //<Sebastian Markbåge>// - **[d7bb524ad](facebook/react@d7bb524ad )**: [cleanup] Remove unused package jest-mock-scheduler ([facebook#26084](facebook/react#26084)) //<Ming Ye>// - **[6b3083266](facebook/react@6b3083266 )**: Upgrade prettier ([facebook#26081](facebook/react#26081)) //<Jan Kassens>// - **[1f5ce59dd](facebook/react@1f5ce59dd )**: [cleanup] fully roll out warnAboutSpreadingKeyToJSX ([facebook#26080](facebook/react#26080)) //<Jan Kassens>// Changelog: [General][Changed] - React Native sync for revisions 48b687f...fccf3a9 jest_e2e[run_all_tests] Reviewed By: rubennorte Differential Revision: D43305607 fbshipit-source-id: 8da7567ca2a182f4be27788935c2da30a731f83b
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#25687
This lets you pass Promises from server components to client components and
use()them there.We still don't support Promises as children on the client, so we need to support both. This will be a lot simpler when we remove the need to encode children as lazy since we don't need the lazy encoding anymore then.
I noticed that this test failed because we don't synchronously resolve instrumented Promises if they're lazy. The second fix calls
.then()early to ensure that this lazy initialization can happen eagerly.It felt silly to do this with an empty function or something, so I just did the attachment of ping listeners early here. It's also a little silly since they will ping the currently running render for no reason if it's synchronously available.EDIT: That didn't work because a ping might interrupt the current render. Probably need a bigger refactor.We could add another extension but we've already taken a lot of liberties with the Promise protocol. At least this is one that doesn't need extension of the protocol as much. Any sub-class of promises could do this.