## Summary
as we began [discussing
yesterday](https://github.com/facebook/react/pull/27056#discussion_r1253282784),
`SuspenseList` is not actually stable yet, and should likely be exported
with the `unstable_` prefix.
the conversation yesterday began discussing this in the context of the
fb-specific packages, but changing it there without updating everywhere
else leads to test failures, so here the change is made across packages.
## How did you test this change?
```
yarn flow dom-browser
yarn test
```
## Summary
Running `yarn test --project devtools --build` currently skips all
non-gated (without `@reactVersion` directives) devtools tests. This is
not expected behaviour, these changes are fixing it.
There were multiple related PRs to it:
- https://github.com/facebook/react/pull/26742
- https://github.com/facebook/react/pull/25712
- https://github.com/facebook/react/pull/24555
With these changes, the resulting behaviour will be:
- If `REACT_VERSION` env variable is specified:
- jest will not include all non-gated test cases in the test run
- jest will run only a specific test case, when specified
`REACT_VERSION` value satisfies the range defined by `@reactVersion`
directives for this test case
- If `REACT_VERSION` env variable is not specified, jest will run all
non-gated tests:
- jest will include all non-gated test cases in the test run
- jest will run all non-gated test cases, the only skipped test cases
will be those, which specified the range that does not include the next
stable version of react, which will be imported from `ReactVersions.js`
## How did you test this change?
Running `profilingCache` test suite without specifying `reactVersion`
now skips gated (>= 17 & < 18) test
<img width="1447" alt="Screenshot 2023-06-15 at 11 18 22"
src="https://github.com/facebook/react/assets/28902667/cad58994-2cb3-44b3-9eb2-1699c01a1eb3">
Running `profilingCache` test suite with specifying `reactVersion` to
`17` now runs this test case and skips others correctly
<img width="1447" alt="Screenshot 2023-06-15 at 11 20 11"
src="https://github.com/facebook/react/assets/28902667/d308960a-c172-4422-ba6f-9c0dbcd6f7d5">
Running `yarn test --project devtools ...` without specifying
`reactVersion` now runs all non-gated test cases
<img width="398" alt="Screenshot 2023-06-15 at 12 25 12"
src="https://github.com/facebook/react/assets/28902667/2b329634-0efd-4c4c-b460-889696bbc9e1">
Running `yarn test --project devtools ...` with specifying
`reactVersion` (to `17` in this example) now includes only gated tests
<img width="414" alt="Screenshot 2023-06-15 at 12 26 31"
src="https://github.com/facebook/react/assets/28902667/a702c27e-4c35-4b12-834c-e5bb06728997">
For React Native environment, we sometimes spam the console with
warnings `"Could not find Fiber with id ..."`.
This is an attempt to fix this or at least reduce the amount of such
potential warnings being thrown.
Now checking if fiber is already unnmounted before trying to get native
nodes for fiber. This might happen if you try to inspect an element in
DevTools, but at the time when event has been received, the element was
already unmounted.
## Summary
- Updated `webpack` (and all related packages) to v5 in
`react-devtools-*` packages.
- I haven't touched any `TODO (Webpack 5)`. Tried to poke it, but each
my attempt failed and parsing hook names feature stopped working. I will
work on this in a separate PR.
- This work is one of prerequisites for updating Firefox extension to
manifests v3
related PRs:
https://github.com/facebook/react/pull/22267https://github.com/facebook/react/pull/26506
## How did you test this change?
Tested on all surfaces, explicitly checked that parsing hook names
feature still works.
## Summary
>Warning: Received NaN for the `children` attribute. If this is
expected, cast the value to a string.
Fixes this warning, when we try to display NaN as NaN in key-value list.
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## Summary
Fix devtools cannot be shutdown by bridge.shutdown().
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Just a small upgrade to keep us current and remove unused suppressions
(probably fixed by some upgrade since).
- `*` is no longer allowed and has been an alias for `any` for a while
now.
## Summary
We have a case:
1. Open components tab
2. Close Chrome / Firefox devtools window completely
3. Reopen browser devtools panel
4. Open components tab
Currently, in version 4.27.6, we cannot load the components tree.
This PR contains two changes:
- non-functional refactoring in
`react-devtools-shared/src/devtools/store.js`: removed some redundant
type castings.
- fixed backend manager logic (introduced in
https://github.com/facebook/react/pull/26615) to activate already
registered backends. Looks like frontend of devtools also depends on
`renderer-attached` event, without it component tree won't load.
## How did you test this change?
This fixes the case mentioned prior. Currently in 4.27.6 version it is
not working, we need to refresh the page to make it work.
I've tested this in several environments: chrome, firefox, standalone
with RN application.
This adds an experimental hook tentatively called useOptimisticState.
(The actual name needs some bikeshedding.)
The headline feature is that you can use it to implement optimistic
updates. If you set some optimistic state during a transition/action,
the state will be automatically reverted once the transition completes.
Another feature is that the optimistic updates will be continually
rebased on top of the latest state.
It's easiest to explain with examples; we'll publish documentation as
the API gets closer to stabilizing. See tests for now.
Technically the use cases for this hook are broader than just optimistic
updates; you could use it implement any sort of "pending" state, such as
the ones exposed by useTransition and useFormStatus. But we expect
people will most often reach for this hook to implement the optimistic
update pattern; simpler cases are covered by those other hooks.
This test started failing recently in older versions of React because
the Scheduler priority inside a microtask is Normal instead of
Immediate. This is expected because microtasks are not Scheduler tasks;
it's an implementation detail.
I gated the test to only run in v17 because it's a regression test for
legacy Suspense behavior, and the implementation details of the snapshot
changed in v18.
Test plan
---------
Using latest:
```
yarn test --build --project devtools --release-channel=experimental profilingcache
```
Using v17 (typically runs in a timed CI workflow):
```
/scripts/circleci/download_devtools_regression_build.js 17.0 --replaceBuild
yarn test --build --project devtools --release-channel=experimental --reactVersion 17.0 profilingcache
```
- substr is Annex B
- substring silently flips its arguments if they're in the "wrong order", which is confusing
- slice is better than sliced bread (no pun intended) and also it works the same way on Arrays so there's less to remember
---
> I'd be down to just lint and enforce a single form just for the potential compression savings by using a repeated string.
_Originally posted by @sebmarkbage in https://github.com/facebook/react/pull/26663#discussion_r1170455401_
## Summary
Removing `enableNamedHooksFeature`, `enableProfilerChangedHookIndices`,
`enableProfilerComponentTree` feature flags, they are the same for all
configurations.
In the extension, currently we do the following:
1. check whether there's at least one React renderer on the page
2. if yes, load the backend to the page
3. initialize the backend
To support multiple versions of backends, we are changing it to:
1. check the versions of React renders on the page
2. load corresponding React DevTools backends that are shipped with the
extension; if they are not contained (usually prod builds of
prereleases), show a UI to allow users to load them from UI
3. initialize each of the backends
To enable this workflow, a backend will ignore React renderers that does
not match its version
This PR adds a new file "backendManager" in the extension for this
purpose.
------
I've tested it on Chrome, Edge and Firefox extensions
Fixes https://github.com/facebook/react/issues/26500
## Summary
- No more using `clipboard-js` from the backend side, now emitting
custom `saveToClipboard` event, also adding corresponding listener in
`store.js`
- Not migrating to `navigator.clipboard` api yet, there were some issues
with using it on Chrome, will add more details to
https://github.com/facebook/react/pull/26539
## How did you test this change?
- Tested on Chrome, Firefox, Edge
- Tested on standalone electron app: seems like context menu is not
expected to work there (cannot right-click on value, the menu is not
appearing), other logic (pressing on copy icon) was not changed
## Summary
This pull request aims to improve the maintainability of the codebase by
consolidating types and constants that are shared between the backend
and frontend. This consolidation will allow us to maintain backwards
compatibility in the frontend in the future.
To achieve this, we have moved the shared types and constants to the
following blessed files:
- react-devtools-shared/src/constants
- react-devtools-shared/src/types
- react-devtools-shared/src/backend/types
- react-devtools-shared/src/backend/NativeStyleEditor/types
Please note that the inclusion of NativeStyleEditor in this list is
temporary, and we plan to remove it once we have a better plugin system
in place.
## How did you test this change?
I have tested it by running `yarn flow dom-node`, which reports no
errors.
## Summary
- #26234 is reverted and replaced with a better approach
- introduce a new global devtools variable to decouple the global hook's
dependency on backend/console.js, and add it to react-devtools-inline
and react-devtools-standalone
With this PR, I want to introduce a new principle to hook.js: we should
always be alert when editing this file and avoid importing from other
files.
In the past, we try to inline a lot of the implementation because we use
`.toString()` to inject this function from the extension (we still have
some old comments left). Although it is no longer inlined that way, it
has became now more important to keep it clean as it is a de facto
global API people are using (9.9K files contains it on Github search as
of today).
**File size change for extension:**
Before:
379K installHook.js
After:
21K installHook.js
363K renderer.js
We shouldn't be referencing internal fields like fiber's `flag` directly
of DevTools. It's an implementation detail. However, over the years a
few of these have snuck in. Because of how DevTools is currently
shipped, where it's expected to be backwards compatible with older
versions of React, this prevents us from refactoring those fields inside
the reconciler.
The plan we have to address this is to fix how DevTools is shipped:
DevTools will be released in lockstep with each version of React.
Until then, though, I need a temporary solution because it's blocking a
feature I'm working on. So in meantime, I'm going to have to fork the
DevTool's code based on the React version, like we already do with the
fiber TypeOfWork enum.
As a first step, I've inlined all the references to fiber flags into the
specific call sites where they are used. Eventually we'll import these
functions from the reconciler so they stay in sync, rather than
maintaining duplicate copies of the logic.
## Summary
Fixes https://github.com/facebook/react/issues/24781
Restricting from editing props, which are class instances, because their
internals should be opaque.
Proposed changes:
1. Adding new data type `class_instance`: based on prototype chain of an
object we will check if its plain or not. If not, then will be marked as
`class_instance`. This should not affect `arrays`, ..., because we do
this in the end of an `object` case in `getDataType` function.
Important detail: this approach won't work for objects created with
`Object.create`, because of the custom prototype. This can also be
bypassed by manually deleting a prototype ¯\\\_(ツ)_/¯
I am not sure if there might be a better solution (which will cover all
cases) to detect if object is a class instance. Initially I was trying
to use `Object.getPrototypeOf(object) === Object.prototype`, but this
won't work for cases when we are dealing with `iframe`.
2. Objects with a type `class_instance` will be marked as unserializable
and read-only.
## Demo
`person` is a class instance, `object` is a plain object
https://user-images.githubusercontent.com/28902667/228914791-ebdc8ab0-eb5c-426d-8163-66d56b5e8790.mov
When React receives new input (via `setState`, a Suspense promise
resolution, and so on), it needs to ensure there's a rendering task
associated with the update. Most of this happens
`ensureRootIsScheduled`.
If a single event contains multiple updates, we end up running the
scheduling code once per update. But this is wasteful because we really
only need to run it once, at the end of the event (or in the case of
flushSync, at the end of the scope function's execution).
So this PR moves the scheduling logic to happen in a microtask instead.
In some cases, we will force it run earlier than that, like for
`flushSync`, but since updates are batched by default, it will almost
always happen in the microtask. Even for discrete updates.
In production, this should have no observable behavior difference. In a
testing environment that uses `act`, this should also not have a
behavior difference because React will push these tasks to an internal
`act` queue.
However, tests that do not use `act` and do not simulate an actual
production environment (like an e2e test) may be affected. For example,
before this change, if a test were to call `setState` outside of `act`
and then immediately call `jest.runAllTimers()`, the update would be
synchronously applied. After this change, that will no longer work
because the rendering task (a timer, in this case) isn't scheduled until
after the microtask queue has run.
I don't expect this to be an issue in practice because most people do
not write their tests this way. They either use `act`, or they write
e2e-style tests.
The biggest exception has been... our own internal test suite. Until
recently, many of our tests were written in a way that accidentally
relied on the updates being scheduled synchronously. Over the past few
weeks, @tyao1 and I have gradually converted the test suite to use a new
set of testing helpers that are resilient to this implementation detail.
(There are also some old Relay tests that were written in the style of
React's internal test suite. Those will need to be fixed, too.)
The larger motivation behind this change, aside from a minor performance
improvement, is we intend to use this new microtask to perform
additional logic that doesn't yet exist. Like inferring the priority of
a custom event.
Added an explicit type to all $FlowFixMe suppressions to reduce
over-suppressions of new errors that might be caused on the same lines.
Also removes suppressions that aren't used (e.g. in a `@noflow` file as
they're purely misleading)
Test Plan:
yarn flow-ci
For various reasons some of the DevTools e2e tests uses our repo's
private internal version of `act`. It should really just be using the
public one.
This converts one of the usages, because it was causing CI to fail.
This adds an async gap to our internal implementation of `act` (the one
used by our repo, not the public API). Rather than call the provided
scope function synchronously when `act` is called, we call it in a
separate async task. This is an extra precaution to ensure that our
tests do not accidentally rely on work being queued synchronously,
because that is an implementation detail that we should be allowed to
change. We don't do this in the public version of `act`, though we maybe
should in the future, for the same rationale. That might be tricky,
though, because it could break existing tests.
This also fixes the issue where our internal `act` requires an async
function. You can pass it a regular function, too.
This is not a public API. We only use it for our internal tests, the
ones in this repo. Let's move it to this private package. Practically
speaking this will also let us use async/await in the implementation.
Similar to the rationale for `waitFor` (see #26285), we should always
await the result of an `act` call so that microtasks have a chance to
fire.
This only affects the internal `act` that we use in our repo, for now.
In the public `act` API, we don't yet require this; however, we
effectively will for any update that triggers suspense once `use` lands.
So we likely will start warning in an upcoming minor.
(This only affects our own internal repo; it's not a public API.)
I think most of us agree this is a less confusing name. It's possible
someone will confuse it with `console.log`. If that becomes a problem we
can warn in dev or something.
This converts some of our test suite to use the `waitFor` test pattern,
instead of the `expect(Scheduler).toFlushAndYield` pattern. Most of
these changes are automated with jscodeshift, with some slight manual
cleanup in certain cases.
See #26285 for full context.
This converts some of our test suite to use the `waitFor` test pattern,
instead of the `expect(Scheduler).toFlushAndYield` pattern. Most of
these changes are automated with jscodeshift, with some slight manual
cleanup in certain cases.
See #26285 for full context.
## Summary
When looking into the compiled code of `installHook.js` of the extension
build, I noticed that it actually includes the large `attach` function
(from renderer.js). I don't think it was expected.
This is because `hook.js` imports from `backend/console.js` which
imports from `backend/renderer.js` for `getInternalReactConstants`
A straightforward way is to extract function
`getInternalReactConstants`. However, I think it's more simplified to
just merge these two files and save the 361K renderer.js from the
extension build since we have always been loading this code anyways.
I changed the execution check from `__REACT_DEVTOOLS_ATTACH__ ` to the
session storage.
## How did you test this change?
Everything works normal in my local build.
## Hoistables
In the original implementation of Float, all hoisted elements were
treated like Resources. They had deduplication semantics and hydrated
based on a key. This made certain kinds of hoists very challenging such
as sequences of meta tags for `og:image:...` metadata. The reason is
each tag along is not dedupable based on only it's intrinsic properties.
two identical tags may need to be included and hoisted together with
preceding meta tags that describe a semantic object with a linear set of
html nodes.
It was clear that the concept of Browser Resources (stylesheets /
scripts / preloads) did not extend universally to all hositable tags
(title, meta, other links, etc...)
Additionally while Resources benefit from deduping they suffer an
inability to update because while we may have multiple rendered elements
that refer to a single Resource it isn't unambiguous which element owns
the props on the underlying resource. We could try merging props, but
that is still really hard to reason about for authors. Instead we
restrict Resource semantics to freezing the props at the time the
Resource is first constructed and warn if you attempt to render the same
Resource with different props via another rendered element or by
updating an existing element for that Resource.
This lack of updating restriction is however way more extreme than
necessary for instances that get hoisted but otherwise do not dedupe;
where there is a well defined DOM instance for each rendered element. We
should be able to update props on these instances.
Hoistable is a generalization of what Float tries to model for hoisting.
Instead of assuming every hoistable element is a Resource we now have
two distinct categories, hoistable elements and hoistable resources. As
one might guess the former has semantics that match regular Host
Components except the placement of the node is usually in the <head>.
The latter continues to behave how the original implementation of
HostResource behaved with the first iteration of Float
### Hoistable Element
On the server hoistable elements render just like regular tags except
the output is stored in special queues that can be emitted in the stream
earlier than they otherwise would be if rendered in place. This also
allow for instance the ability to render a hoistable before even
rendering the <html> tag because the queues for hoistable elements won't
flush until after we have flushed the preamble (`<DOCTYPE
html><html><head>`).
On the client, hoistable elements largely operate like HostComponents.
The most notable difference is in the hydration strategy. If we are
hydrating and encounter a hoistable element we will look for all tags in
the document that could potentially be a match and we check whether the
attributes match the props for this particular instance. We also do this
in the commit phase rather than the render phase. The reason hydration
can be done for HostComponents in render is the instance will be removed
from the document if hydration fails so mutating it in render is safe.
For hoistables the nodes are not in a hydration boundary (Root or
SuspenseBoundary at time of writing) and thus if hydration fails and we
may have an instance marked as bound to some Fiber when that Fiber never
commits. Moving the hydration matching to commit ensures we will always
succeed in pairing the hoisted DOM instance with a Fiber that has
committed.
### Hoistable Resource
On the server and client the semantics of Resources are largely the same
they just don't apply to title, meta, and most link tags anymore.
Resources hoist and dedupe via an `href` key and are ref counted. In a
future update we will add a garbage collector so we can clean up
Resources that no longer have any references
## `<style>` support
In earlier implementations there was no support for <style> tags. This
PR adds support for treating `<style href="..."
precedence="...">...</style>` as a Resource analagous to `<link
rel="stylesheet" href="..." precedence="..." />`
It may seem odd at first to require an href to get Resource semantics
for a style tag. The rationale is that these are for inlining of actual
external stylesheets as an optimization and for URI like scoping of
inline styles for css-in-js libraries. The href indicates that the key
space for `<style>` and `<link rel="stylesheet" />` Resources is shared.
and the precedence is there to allow for interleaving of both kinds of
Style resources. This is an advanced feature that we do not expect most
app developers to use directly but will be quite handy for various
styling libraries and for folks who want to inline as much as possible
once Fizz supports this feature.
## refactor notes
* HostResource Fiber type is renamed HostHoistable to reflect the
generalization of the concept
* The Resource object representation is modified to reduce hidden class
checks and to use less memory overall
* The thing that distinguishes a resource from an element is whether the
Fiber has a memoizedState. If it does, it will use resource semantics,
otherwise element semantics
* The time complexity of matching hositable elements for hydration
should be improved
## Summary
- yarn.lock diff +-6249, **small pr**
- use jest-environment-jsdom by default
- uncaught error from jsdom is an error object instead of strings
- abortSignal.reason is read-only in jsdom and node,
https://developer.mozilla.org/en-US/docs/Web/API/AbortSignal/reason
## How did you test this change?
ci green
---------
Co-authored-by: Sebastian Silbermann <silbermann.sebastian@gmail.com>
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## Summary
This PR:
- Replaces the existing usages of methods from the `semver` library in
the React DevTools source with an inlined version based on
https://www.npmjs.com/package/semver-compare.
This appears to drop the unminified bundle sizes of 3 separate
`react-devtools-extensions` build artifacts by about 50K:
## How did you test this change?
I was originally working on [a fork of React
DevTools](https://github.com/replayio/react/pull/2) for use with
https://replay.io , specifically our integration of the React DevTools
UI to show the React component tree while users are debugging a recorded
application.
As part of the dev work on that fork, I wanted to shrink the bundle size
of the extension's generated JS build artifacts. I noted that the
official NPM `semver` library was taking up a noticeable chunk of space
in the bundles, and saw that it's only being used in a handful of places
to do some very simple version string comparisons.
I was able to replace the `semver` imports and usages with a simple
alternate comparison function, and confirmed via hands-on checks and
console logging that the checks behaved the same way.
Given that, I wanted to upstream this particular change to help shrink
the real extension's bundle sizes.
I know that it's an extension, so bundle size isn't _as_ critical a
concern as it would be for a pure library. But, smaller download sizes
do benefit all users, and that also includes sites like CodeSandbox and
Replay that are using the React DevTools as a library as well.
I'm happy to tweak this PR if necessary. Thanks!
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## Summary
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This pull request emit the trace update events `drawTraceUpdates` with
the trace frame information when the trace update drawer runs outside of
web environment. This allows React Devtool running in mobile or other
platforms have a chance to render such highlights and provide similar
feature on web to provide re-render highlights. This is a feature needed
for identifying unnecessary re-renders.
## How did you test this change?
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I tested this change with Flipper desktop app running against mobile
app, and verified that the event with correct array of frames are
passing through properly.
The old version of prettier we were using didn't support the Flow syntax
to access properties in a type using `SomeType['prop']`. This updates
`prettier` and `rollup-plugin-prettier` to the latest versions.
I added the prettier config `arrowParens: "avoid"` to reduce the diff
size as the default has changed in Prettier 2.0. The largest amount of
changes comes from function expressions now having a space. This doesn't
have an option to preserve the old behavior, so we have to update this.
These suppressions are no longer required.
Generated using:
```sh
flow/tool update-suppressions .
```
followed by adding back 1 or 2 suppressions that were only triggered in
some configurations.
After the previous changes these upgrade are easy.
- removes config options that were removed
- object index access now requires an indexer key in the type, this
cause a handful of errors that were fixed
- undefined keys error in all places, this needed a few extra
suppressions for repeated undefined identifiers.
Flow's
[CHANGELOG.md](https://github.com/facebook/flow/blob/main/Changelog.md).
This enables the "exact_empty_objects" setting for Flow which makes
empty objects exact instead of building up the type as properties are
added in code below. This is in preparation to Flow 191 which makes this
the default and removes the config.
More about the change in the Flow blog
[here](https://medium.com/flow-type/improved-handling-of-the-empty-object-in-flow-ead91887e40c).
