Previously, we bailed out on outlining jsx that had children that were
not part of the outlined jsx.
Now, we add support for children by treating as attributes.
Previously, we would skip outlining jsx expressions that had duplicate
jsx attributes as we would not rename them causing incorrect
compilation.
In this PR, we add outlining support for duplicate jsx attributes by
renaming them.
Previously, we'd directly store the original attributes from the jsx
expressions. But this isn't enough as we want to rename duplicate
attributes.
This PR refactors the prop collection logic to store both the original
and new names for jsx attributes in the newly outlined jsx expression.
For now, both the new and old names are the same. In the future, they
will be different when we add support for outlining expressions with
duplicate attribute names.
Recursively collect identifier / property loads and optional chains from
inner functions. This PR is in preparation for #31200
Previously, we only did this in `collectHoistablePropertyLoads` to
understand hoistable property loads from inner functions.
1. collectTemporariesSidemap
2. collectOptionalChainSidemap
3. collectHoistablePropertyLoads
- ^ this recursively calls `collectTemporariesSidemap`,
`collectOptionalChainSidemap`, and `collectOptionalChainSidemap` on
inner functions
4. collectDependencies
Now, we have
1. collectTemporariesSidemap
- recursively record identifiers in inner functions. Note that we track
all temporaries in the same map as `IdentifierIds` are currently unique
across functions
2. collectOptionalChainSidemap
- recursively records optional chain sidemaps in inner functions
3. collectHoistablePropertyLoads
- (unchanged, except to remove recursive collection of temporaries)
4. collectDependencies
- unchanged: to be modified to recursively collect dependencies in next
PR
'
---
[//]: # (BEGIN SAPLING FOOTER)
Stack created with [Sapling](https://sapling-scm.com). Best reviewed
with [ReviewStack](https://reviewstack.dev/facebook/react/pull/31346).
* #31202
* #31203
* #31201
* #31200
* __->__ #31346
* #31199
`enablePropagateScopeDepsHIR` is now used extensively in Meta. This has
been tested for over two weeks in our e2e tests and production.
The rest of this stack deletes `LoweredFunction.dependencies`, which the
non-hir version of `PropagateScopeDeps` depends on. To avoid a more
forked HIR (non-hir with dependencies and hir with no dependencies),
let's go ahead and clean up the non-hir version of
PropagateScopeDepsHIR.
Note that all fixture changes in this PR were previously reviewed when
they were copied to `propagate-scope-deps-hir-fork`. Will clean up /
merge these duplicate fixtures in a later PR
'
---
[//]: # (BEGIN SAPLING FOOTER)
Stack created with [Sapling](https://sapling-scm.com). Best reviewed
with [ReviewStack](https://reviewstack.dev/facebook/react/pull/31199).
* #31202
* #31203
* #31201
* #31200
* #31346
* __->__ #31199
All dependencies and declarations of a reactive scope can be reordered
to scope start/end. i.e. generated code does not depend on conditional
short-circuiting logic as dependencies are inferred to have no side
effects.
Sorting these by name helps us get higher signal compilation snapshot
diffs when upgrading the compiler and testing PRs
Move environment config parsing for `inlineJsxTransform`,
`lowerContextAccess`, and some dev-only options out of snap (test
fixture). These should now be available for playground via
`@inlineJsxTransform` and `lowerContextAccess`.
Other small change:
Changed zod fields from `nullish()` -> `nullable().default(null)`.
[`nullish`](https://zod.dev/?id=nullish) fields accept `null |
undefined` and default to `undefined`. We don't distinguish between null
and undefined for any of these options, so let's only accept null +
default to null. This also makes EnvironmentConfig in the playground
more accurate. Previously, some fields just didn't show up as
`prettyFormat({field: undefined})` does not print `field`.
We were bailing out on complex computed-key syntax (prior to #31344) as
we assumed that this caused bugs (due to inferring computed key rvalues
to have `freeze` effects).
This fixture shows that this bailout is unrelated to the underlying bug
`PropertyPathRegistry` is responsible for uniqueing identifier and
property paths. This is necessary for the hoistability CFG merging logic
which takes unions and intersections of these nodes to determine a basic
block's hoistable reads, as a function of its neighbors. We also depend
on this to merge optional chained and non-optional chained property
paths
This fixes a small bug in #31066 in which we create a new registry for
nested functions. Now, we use the same registry for a component / hook
and all its inner functions
'
---
[//]: # (BEGIN SAPLING FOOTER)
Stack created with [Sapling](https://sapling-scm.com). Best reviewed
with [ReviewStack](https://reviewstack.dev/facebook/react/pull/31345).
* #31204
* #31202
* #31203
* #31201
* #31200
* #31346
* #31199
* #31431
* __->__ #31345
* #31197
JSX inlining is a prod-only optimization. We want to enforce this while
maintaining the same compiler output in DEV and PROD.
Here we add a conditional to the transform that only replaces JSX with
object literals outside of DEV. Then a later build step can handle DCE
based on the value of `__DEV__`
When resolving import specifiers from the react namespace (`import
{imported as local} from 'react'`), we were previously only checking if
the `imported` identifier was a hook if we didn't already have its
definition in the global registry. We also need to check if `local` is a
hook in the case of aliasing since there may be hook-like APIs in react
that don't start with `use` (eg they are experimental or unstable).
---
[//]: # (BEGIN SAPLING FOOTER)
Stack created with [Sapling](https://sapling-scm.com). Best reviewed
with [ReviewStack](https://reviewstack.dev/facebook/react/pull/31384).
* #31385
* __->__ #31384
* #31383
This PR loosens the restriction on the types of computed properties we
can handle.
Previously, we would disallow anything that is not an identifier because
non-identifiers could be mutating. But member expressions are not
mutating so we can treat them similar to identifiers.
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## Summary
<!--
Explain the **motivation** for making this change. What existing problem
does the pull request solve?
-->
The recent blog post and
[documentation](https://react.dev/learn/react-compiler#using-react-compiler-with-react-17-or-18)
say that `react-compiler-runtime` supports React 17, yet it currently
requires React 18 or 19 as a peer dependency, making it unusable for
installing on a project still using React 17.
## How did you test this change?
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Manually installing the package on a React 17 codebase.
---------
Co-authored-by: lauren <poteto@users.noreply.github.com>
## Summary
This fixes a minor nit I have about the `react-compiler-runtime` package
in that the published code is minified. I assume most consumers will
minify their own bundles so there's no real advantage to minifying it as
part of the build.
For my purposes it makes it more difficult to read the code, use
`patch-package` (if needed), or diff two versions without referencing
the source code on github or mapping it back to original source using
the source maps.
## How did you test this change?
I ran the build locally and looked at the result but did not run the
code. It's a lot more readable except for the commonjs
compatibility-related stuff that Rollup inserts.
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4. Ensure the test suite passes (`yarn test`). Tip: `yarn test --watch
TestName` is helpful in development.
5. Run `yarn test --prod` to test in the production environment. It
supports the same options as `yarn test`.
6. If you need a debugger, run `yarn test --debug --watch TestName`,
open `chrome://inspect`, and press "Inspect".
7. Format your code with
[prettier](https://github.com/prettier/prettier) (`yarn prettier`).
8. Make sure your code lints (`yarn lint`). Tip: `yarn linc` to only
check changed files.
9. Run the [Flow](https://flowtype.org/) type checks (`yarn flow`).
10. If you haven't already, complete the CLA.
Learn more about contributing:
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## Summary
Since the Babel plugin is bundled into a single file (except for
`@babel/types`
45804af18d/compiler/packages/babel-plugin-react-compiler/rollup.config.js (L18))
we can move these deps to `devDependencies`.
Main motivation is e.g. not installing ancient version of
`pretty-format` (asked in https://github.com/facebook/react/issues/29062
without getting a reason, but if consumers can just skip the deps
entirely that's even better).
<!--
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does the pull request solve?
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## How did you test this change?
I tested by installing the plugin into an empty project, deleting
everything in `node_modules` _except_ for `babel-plugin-react-compiler`
and doing `require('babel-plugin-react-compiler')`. It still worked
fine, so it should work in other cases as well 😀
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InlineJSXTransform wasn't traversing into function expressions or object
methods, so any JSX inside such functions wouldn't have gotten inlined.
This PR updates to traverse nested functions to transform all JSX within
a hook or component.
Note that this still doesn't transform JSX outside of components or
hooks, ie in standalone render helpers.
This was previously blocked because the playground was a part of the
compiler's yarn workspace and there was some funky hoisting going on.
Now that we are decoupled we can upgrade to Next 15, which hopefully
should improve build times.
---
[//]: # (BEGIN SAPLING FOOTER)
Stack created with [Sapling](https://sapling-scm.com). Best reviewed
with [ReviewStack](https://reviewstack.dev/facebook/react/pull/31291).
* #31293
* #31292
* __->__ #31291
It turns out npm sets the latest tag by default so simply removing it
didn't change the previous behavior.
The `latest` tag is typically used for stable release versions, and
other tags for unstable versions such as prereleases. Since the compiler
is still in prerelease, let's set the latest tag only for
non-experimental releases to help signal which version is the safest to
try out.
---
[//]: # (BEGIN SAPLING FOOTER)
Stack created with [Sapling](https://sapling-scm.com). Best reviewed
with [ReviewStack](https://reviewstack.dev/facebook/react/pull/31288).
* #31289
* __->__ #31288
Currently, the react compiler can not compile within callbacks which can
potentially cause over rendering. Consider this example:
```jsx
function Component(countries, onDelete) {
const name = useFoo();
return countries.map(() => {
return (
<Foo>
<Bar name={name}/>
<Baz onclick={onDelete} />
</Foo>
);
});
}
```
In this case, there's no memoization of the nested jsx elements. But
instead if we were to manually refactor the nested jsx into separate
component like this:
```jsx
function Component(countries, onDelete) {
const name = useFoo();
return countries.map(() => {
return <Temp name={name} onDelete={onDelete} />;
});
}
function Temp({ name, onDelete }) {
return (
<Foo>
<Bar name={name} />
<Baz onclick={onDelete} />
</Foo>
);
}
```
The compiler can now optimise both these components:
```jsx
function Component(countries, onDelete) {
const $ = _c(4);
const name = useFoo();
let t0;
if ($[0] !== name || $[1] !== onDelete || $[2] !== countries) {
t0 = countries.map(() => <Temp name={name} onDelete={onDelete} />);
$[0] = name;
$[1] = onDelete;
$[2] = countries;
$[3] = t0;
} else {
t0 = $[3];
}
return t0;
}
function Temp(t0) {
const $ = _c(7);
const { name, onDelete } = t0;
let t1;
if ($[0] !== name) {
t1 = <Bar name={name} />;
$[0] = name;
$[1] = t1;
} else {
t1 = $[1];
}
let t2;
if ($[2] !== onDelete) {
t2 = <Baz onclick={onDelete} />;
$[2] = onDelete;
$[3] = t2;
} else {
t2 = $[3];
}
let t3;
if ($[4] !== t1 || $[5] !== t2) {
t3 = (
<Foo>
{t1}
{t2}
</Foo>
);
$[4] = t1;
$[5] = t2;
$[6] = t3;
} else {
t3 = $[6];
}
return t3;
}
```
Now, when `countries` is updated by adding one single value, only the
newly added value is re-rendered and not the entire list. Rather than
having to do this manually, this PR teaches the react compiler to do
this transformation.
This PR adds a new pass (`OutlineJsx`) to capture nested jsx statements
and outline them in a separate component. This newly outlined component
can then by memoized by the compiler, giving us more fine grained
rendering.
Summary:
With the previous PR we no longer need to mark identifiers as reactive in contexts where we don't have places. We already deleted most uses of markReactiveId; the last case was to track identifiers through loadlocals etc -- but we already use a disjoint alias map that accounts for loadlocals when setting reactivity.
ghstack-source-id: 69ce0a78b0
Pull Request resolved: https://github.com/facebook/react/pull/31178
Summary:
The official guidance for useRef notes an exception to the rule that refs cannot be accessed during render: to avoid recreating the ref's contents, you can test that the ref is uninitialized and then initialize it using an if statement:
```
if (ref.current == null) {
ref.current = SomeExpensiveOperation()
}
```
The compiler didn't recognize this exception, however, leading to code that obeyed all the official guidance for refs being rejected by the compiler. This PR fixes that, by extending the ref validation machinery with an awareness of guard operations that allow lazy initialization. We now understand `== null` and similar operations, when applied to a ref and consumed by an if terminal, as marking the consequent of the if as a block in which the ref can be safely written to. In order to do so we need to create a notion of ref ids, which link different usages of the same ref via both the ref and the ref value.
ghstack-source-id: d2729274f351e1eb0268f28f629fa4c2568ebc4d
Pull Request resolved: https://github.com/facebook/react/pull/31188
Bumps [micromatch](https://github.com/micromatch/micromatch) from 4.0.5
to 4.0.8.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/micromatch/micromatch/releases">micromatch's
releases</a>.</em></p>
<blockquote>
<h2>4.0.8</h2>
<p>Ultimate release that fixes both CVE-2024-4067 and CVE-2024-4068. We
consider the issues low-priority, so even if you see automated scanners
saying otherwise, don't be scared.</p>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/micromatch/micromatch/blob/master/CHANGELOG.md">micromatch's
changelog</a>.</em></p>
<blockquote>
<h2>[4.0.8] - 2024-08-22</h2>
<ul>
<li>backported CVE-2024-4067 fix (from v4.0.6) over to 4.x branch</li>
</ul>
<h2>[4.0.7] - 2024-05-22</h2>
<ul>
<li>this is basically v4.0.5, with some README updates</li>
<li><strong>it is vulnerable to CVE-2024-4067</strong></li>
<li>Updated braces to v3.0.3 to avoid CVE-2024-4068</li>
<li>does NOT break API compatibility</li>
</ul>
<h2>[4.0.6] - 2024-05-21</h2>
<ul>
<li>Added <code>hasBraces</code> to check if a pattern contains
braces.</li>
<li>Fixes CVE-2024-4067</li>
<li><strong>BREAKS API COMPATIBILITY</strong></li>
<li>Should be labeled as a major release, but it's not.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="8bd704ec0d"><code>8bd704e</code></a>
4.0.8</li>
<li><a
href="a0e68416a4"><code>a0e6841</code></a>
run verb to generate README documentation</li>
<li><a
href="4ec288484f"><code>4ec2884</code></a>
Merge branch 'v4' into hauserkristof-feature/v4.0.8</li>
<li><a
href="03aa805217"><code>03aa805</code></a>
Merge pull request <a
href="https://redirect.github.com/micromatch/micromatch/issues/266">#266</a>
from hauserkristof/feature/v4.0.8</li>
<li><a
href="814f5f70ef"><code>814f5f7</code></a>
lint</li>
<li><a
href="67fcce6a10"><code>67fcce6</code></a>
fix: CHANGELOG about braces & CVE-2024-4068, v4.0.5</li>
<li><a
href="113f2e3fa7"><code>113f2e3</code></a>
fix: CVE numbers in CHANGELOG</li>
<li><a
href="d9dbd9a266"><code>d9dbd9a</code></a>
feat: updated CHANGELOG</li>
<li><a
href="2ab13157f4"><code>2ab1315</code></a>
fix: use actions/setup-node@v4</li>
<li><a
href="1406ea38f3"><code>1406ea3</code></a>
feat: rework test to work on macos with node 10,12 and 14</li>
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Bumps [json5](https://github.com/json5/json5) from 2.2.1 to 2.2.3.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/json5/json5/releases">json5's
releases</a>.</em></p>
<blockquote>
<h2>v2.2.3</h2>
<ul>
<li>Fix: json5@2.2.3 is now the 'latest' release according to npm
instead of v1.0.2. (<a
href="https://redirect.github.com/json5/json5/issues/299">#299</a>)</li>
</ul>
<h2>v2.2.2</h2>
<ul>
<li>Fix: Properties with the name <code>__proto__</code> are added to
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This also fixes a prototype pollution vulnerability reported by
Jonathan Gregson! (<a
href="https://redirect.github.com/json5/json5/issues/295">#295</a>).</li>
</ul>
</blockquote>
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href="https://github.com/json5/json5/compare/v2.2.1...v2.2.2">diff</a>]</h3>
<ul>
<li>Fix: Properties with the name <code>__proto__</code> are added to
objects and arrays.
(<a href="https://redirect.github.com/json5/json5/issues/199">#199</a>)
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href="https://redirect.github.com/json5/json5/issues/295">#295</a>).</li>
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docs(template): bug -> bug report</li>
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2.2.2</li>
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Readme: slight tweak to intro</li>
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Summary:
The fact that phis are identifiers rather than places is unfortunate in a few cases. In some later analyses, we might wish to know whether a phi is reactive, but we don't have an easy way to do that currently.
Most of the changes here is just replacing phi.id with phi.place.identifier and such. Interesting bits are EnterSSA (several functions now take places rather than identifiers, and InferReactivePlaces now needs to mark places as reactive explicitly.
ghstack-source-id: 5f4fb396cd86b421008c37832a5735ac40f8806e
Pull Request resolved: https://github.com/facebook/react/pull/31171
