createRoot(..., {hydrate:true}) -> hydrateRoot(...) #21687
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rickhanlonii
approved these changes
Jun 15, 2021
This adds a new top level API for hydrating a root. It takes the initial children as part of its constructor. These are unlike other render calls in that they have to represent what the server sent and they can't be batched with other updates. I also changed the options to move the hydrationOptions to the top level since now these options are all hydration options. I kept the createRoot one just temporarily to make it easier to codemod internally but I'm doing a follow up to delete. As part of this I un-dried a couple of paths. ReactDOMLegacy was intended to be built on top of the new API but it didn't actually use those root APIs because there are special paths. It also doesn't actually use most of the commmon paths since all the options are ignored. It also made it hard to add only warnings for legacy only or new only code paths. I also forked the create/hydrate paths because they're subtly different since now the options are different. The containers are also different because I now error for comment nodes during hydration which just doesn't work at all but eventually we'll error for all createRoot calls. After some iteration it might make sense to break out some common paths but for now it's easier to iterate on the duplicates.
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I think I saw an explanation for the new APIs in the reactwg but I can't find it now so; why is it Oh nevermind, its the same reason Then presumably you are separating these to allow code splitting of the parts that are different? |
This was referenced Jun 16, 2021
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This adds a new top level API for hydrating a root. It takes the initial children as part of its constructor. These are unlike other render calls in that they have to represent what the server sent and they can't be batched with other updates.
I also changed the options to move the hydrationOptions to the top level since now these options are all hydration options.
I kept the createRoot one just temporarily to make it easier to codemod internally but I'm doing a follow up to delete.
As part of this I un-dried a couple of paths. ReactDOMLegacy was intended to be built on top of the new API but it didn't actually use those root APIs because there are special paths. It also doesn't actually use most of the common paths since all the options are ignored. It also made it hard to add only warnings for legacy only or new only code paths.
I also forked the create/hydrate paths because they're subtly different since now the options are different. The containers are also different because I now error for comment nodes during hydration which just doesn't work at all but eventually we'll error for all createRoot calls.
After some iteration it might make sense to break out some common paths but for now it's easier to iterate on the duplicates.