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## Summary
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does the pull request solve?
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Fixes a syntax error causing the Compiler playground to crash. Resolves
https://github.com/facebook/react/issues/34622.
## How did you test this change?
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Tested locally and added a test.
<img width="1470" height="836" alt="Screenshot 2025-09-27 at 8 13 07 AM"
src="https://github.com/user-attachments/assets/29473682-94c3-49dc-9ee9-c2004062aaea"
/>
Fixed two small issues with the config panel in the compiler playground:
1. Object descriptions were being confined in the config box and most of
it would not be visible upon hover
2. Changed it so that "Applied Configs" would only display a valid set
of configs, rather than switching between "Invalid Configs" and the set
of options. This would be less visually jarring for users as the Output
panel already displays errors. Additionally, if users want to see the
list of config options but have a currently broken config, they would
previously not know how to fix it.
Object hover before:
<img width="702" height="481" alt="Screenshot 2025-09-26 at 10 41 03 AM"
src="https://github.com/user-attachments/assets/b2ddec2f-16ba-41a1-be1f-96211f46764c"
/>
Hover after:
<img width="702" height="481" alt="Screenshot 2025-09-26 at 10 40 37 AM"
src="https://github.com/user-attachments/assets/dc713a22-4710-46a8-a5d7-485060cc9074"
/>
Applied Configs always displays the last valid set of configs:
https://github.com/user-attachments/assets/2fb9232f-7388-4488-9b7a-bb48bf09e4ca
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## Summary
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does the pull request solve?
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Added `<ViewTransition>` for when the "Show Internals" button is toggled
for a basic fade transition. Additionally added a transition for when
tabs are expanded in the advanced view of the Compiler Playground to
display a smoother show/hide animation.
## How did you test this change?
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https://github.com/user-attachments/assets/c706b337-289e-488d-8cd7-45ff1d27788d
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## Summary
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Utilized `<ViewTransition>` to introduce a sliding animation upon
switching between the Output and SourceMap tabs in the default
playground view.
## How did you test this change?
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https://github.com/user-attachments/assets/1ac93482-8104-4f9a-887e-6adca3537dca
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## Summary
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does the pull request solve?
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Introduced `<ViewTransition>` to the React Compiler Playground. Added an
initial animation on the config panel opening/closing to allow for a
smoother visual experience. Previously, the panel would flash in and out
of the screen upon open/close.
## How did you test this change?
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https://github.com/user-attachments/assets/9dc77a6b-d4a5-4a7a-9d81-007ebb55e8d2
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## Summary
Made many small changes to the compiler playground to improve user
experience. Removed any "Loading" indicators that would flash in before
a component would finish loading in. Additionally, before users would
see the "Show Internals" button toggling from false to true if they had
set it at true previously. I was able to refactor the URL/local storage
loading so that the `Store` would be fully initialized before the
components would load in.
Attempted to integrate `<Activity>` into showing/hiding these different
editors, but the current state of [monaco
editors](https://github.com/suren-atoyan/monaco-react) does not allow
for this. I created an issue for them to address:
https://github.com/suren-atoyan/monaco-react/issues/753
Added a debounce to the config editor so every key type wouldn't cause
the output panel to respond instantly. Users can type for 500 ms before
an error is thrown at them.
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Explain the **motivation** for making this change. What existing problem
does the pull request solve?
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## How did you test this change?
Here is what loading the page would look like before (not sure why its
so blurry):
https://github.com/user-attachments/assets/58f4281a-cc02-4141-b9b5-f70d6ace12a2
Here is how it looks now:
https://github.com/user-attachments/assets/40535165-fc7c-44fb-9282-9c7fa76e7d53
Here is the debouncing:
https://github.com/user-attachments/assets/e4ab29e4-1afd-4249-beca-671fb6542f5e
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## Summary
Added an "Applied Configs" section under the Config Overrides panel.
Users will now be able to see the full list of configs applied to the
compiler in the playground. Adds greater discoverability for config
options to override as well. Updated the default config as well to be a
commented config option, so users will start with empty overrides.
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## How did you test this change?
https://github.com/user-attachments/assets/1a57b2d5-0405-4fc8-9990-1747c30181c0
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## Summary
Removed the old `OVERRIDE` pragma to make the source of truth for config
overrides in the left-hand pane. Now, it will automatically update the
output pane each time there is an edit to the config. The old pragma
format is still supported, but it will be overwritten by the config pane
if they are modifying the same flags. Removed the gating on the config
panel so now all users will automatically be able to view it, but it
will be initially collapsed.
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## How did you test this change?
https://github.com/user-attachments/assets/9d4512b9-e203-4ce0-ae95-dd96ff03bbc1
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## Summary
Added a "Show Internals" toggle switch to either show only the Config,
Input, Output, and Source Map tabs, or these tabs + all the additional
compiler options. The open/close state of these tabs will be preserved
(unless on page refresh, which is the same as the currently
functionality).
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https://github.com/user-attachments/assets/8eb0f69e-360c-4e9b-9155-7aa185a0c018
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## Summary
Part 3 of adding a "Config Override" panel to the React compiler
playground. Added a button to apply config changes to the Input panel,
as well as making the tab collapsible. Added validation for the the
PluginOptions type (although comes with a bit more boilerplate) to make
it very obvious what the possible config errors could be. Added some
toasts for trying to apply broken configs.
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## How did you test this change?
https://github.com/user-attachments/assets/63ab8636-396f-45ba-aaa5-4136e62ccccc
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## Summary
Part 2 of adding a "Config Override" panel to the React compiler
playground. Added sync from the config editor (still only accessible
with the "showConfig" param) to the main source code editor. Adding a
valid config to the editor will add/replace the `@OVERRIDE` pragma above
the source code. Additionally refactored the old implementation to
remove `useEffect`s and unnecessary renders.
Realized upon testing that the user experience is quite jarring,
planning to add a `sync` button in the next PR to fix this.
## How did you test this change?
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https://github.com/user-attachments/assets/a71b1b5f-0539-4c00-8d5c-22426f0280f9
Currently the playground is setup as a linked workspace for the
compiler which complicates our yarn workspace setup and means that snap
can sometimes pull in a different version of react than was otherwise
specified.
There's no real reason to have these workspaces combined so let's split
them up.
ghstack-source-id: 56ab064b2f
Pull Request resolved: https://github.com/facebook/react/pull/31081
Updates the prettier config to format all `.ts` and `.tsx` files in the
repo using the existing defaults and removing overrides.
The first commit in this PR contains the config changes, the second is
just the result of running `yarn prettier-all`.
Summary: The playground currently has limited support for Flow files--it tries to parse them if the // flow sigil is on the fist line, but this is often not the case for files one would like to inspect in practice. more importantly, component syntax isn't supported even then, because it depends on the Hermes parser.
This diff improves the state of flow support in the playground to make it more useful: when we see `flow` anywhere in the file, we'll assume it's a flow file, parse it with the Hermes parser, and disable typescript-specific features of Monaco editor.
ghstack-source-id: b99b1568d7de602dd70d8cf1d8110d62530cf43b
Pull Request resolved: https://github.com/facebook/react/pull/30150
After this is merged, I'll add it to .git-blame-ignore-revs. I can't do
it now as the hash will change after ghstack lands this stack.
ghstack-source-id: 054ca869b7
Pull Request resolved: https://github.com/facebook/react/pull/29214
It was never clear to me what the difference between Wipe and Reset was.
Let's just get rid of one and reset to something more useful instead of
fibonacci.
ghstack-source-id: 4f88a1c1da2d0fd9e1f26e4859c12db0fc961af2
Pull Request resolved: https://github.com/facebook/react-forget/pull/2837
This compresses more efficiently than the base64 encoding we were
previously using, which makes sharing URLs a little less unwieldy and
takes up less space in local storage. Using
some real code as an example, lz-string compresses to 8040 bytes,
whereas the original base64 encoding we were using compresses to 16504
bytes
ghstack-source-id: b8f1089889b94b07d6f419606b798ffddb8863ba
Pull Request resolved: https://github.com/facebook/react-forget/pull/2834
This PR makes all packages share the same typescript version and updates us to
latest versions of typescript, ts-node, typescript-eslint/eslint-plugin and
typescript-eslint/parser.
I also noticed that the tsconfig we were extending (node18-strictest) was
deprecated, so I switched us over to one that's more up to date.
Also had to make a couple of small changes to the playground so that continues
to build correctly.
Sorry about the thrash in advance! This removes the top level `forget` directory
which adds unnecessary nesting to our repo
Hopefully everything still works
