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Ensure optional chaining in swc matches babel #33995
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ijjk
requested review from
huozhi,
padmaia,
shuding and
timneutkens
as code owners
February 4, 2022 16:25
padmaia
approved these changes
Feb 4, 2022
huozhi
approved these changes
Feb 4, 2022
Stats from current PRDefault Build (Increase detected
|
vercel/next.js canary | ijjk/next.js fix/import-optional-chaining-swc | Change | |
---|---|---|---|
buildDuration | 21.1s | 20.6s | -518ms |
buildDurationCached | 7.9s | 7.9s | -42ms |
nodeModulesSize | 359 MB | 359 MB |
Page Load Tests Overall increase ✓
vercel/next.js canary | ijjk/next.js fix/import-optional-chaining-swc | Change | |
---|---|---|---|
/ failed reqs | 0 | 0 | ✓ |
/ total time (seconds) | 4.164 | 4.048 | -0.12 |
/ avg req/sec | 600.32 | 617.52 | +17.2 |
/error-in-render failed reqs | 0 | 0 | ✓ |
/error-in-render total time (seconds) | 2.428 | 2.289 | -0.14 |
/error-in-render avg req/sec | 1029.83 | 1092.1 | +62.27 |
Client Bundles (main, webpack, commons)
vercel/next.js canary | ijjk/next.js fix/import-optional-chaining-swc | Change | |
---|---|---|---|
450.HASH.js gzip | 179 B | 179 B | ✓ |
framework-HASH.js gzip | 42.2 kB | 42.2 kB | ✓ |
main-HASH.js gzip | 27.3 kB | 27.3 kB | ✓ |
webpack-HASH.js gzip | 1.44 kB | 1.44 kB | ✓ |
Overall change | 71.2 kB | 71.2 kB | ✓ |
Legacy Client Bundles (polyfills)
vercel/next.js canary | ijjk/next.js fix/import-optional-chaining-swc | Change | |
---|---|---|---|
polyfills-HASH.js gzip | 31 kB | 31 kB | ✓ |
Overall change | 31 kB | 31 kB | ✓ |
Client Pages
vercel/next.js canary | ijjk/next.js fix/import-optional-chaining-swc | Change | |
---|---|---|---|
_app-HASH.js gzip | 1.37 kB | 1.37 kB | ✓ |
_error-HASH.js gzip | 194 B | 194 B | ✓ |
amp-HASH.js gzip | 312 B | 312 B | ✓ |
css-HASH.js gzip | 326 B | 326 B | ✓ |
dynamic-HASH.js gzip | 2.37 kB | 2.37 kB | ✓ |
head-HASH.js gzip | 350 B | 350 B | ✓ |
hooks-HASH.js gzip | 919 B | 919 B | ✓ |
image-HASH.js gzip | 4.94 kB | 4.94 kB | ✓ |
index-HASH.js gzip | 263 B | 263 B | ✓ |
link-HASH.js gzip | 2.19 kB | 2.19 kB | ✓ |
routerDirect..HASH.js gzip | 321 B | 321 B | ✓ |
script-HASH.js gzip | 383 B | 383 B | ✓ |
withRouter-HASH.js gzip | 318 B | 318 B | ✓ |
85e02e95b279..7e3.css gzip | 107 B | 107 B | ✓ |
Overall change | 14.3 kB | 14.3 kB | ✓ |
Client Build Manifests
vercel/next.js canary | ijjk/next.js fix/import-optional-chaining-swc | Change | |
---|---|---|---|
_buildManifest.js gzip | 459 B | 459 B | ✓ |
Overall change | 459 B | 459 B | ✓ |
Rendered Page Sizes
vercel/next.js canary | ijjk/next.js fix/import-optional-chaining-swc | Change | |
---|---|---|---|
index.html gzip | 531 B | 531 B | ✓ |
link.html gzip | 544 B | 544 B | ✓ |
withRouter.html gzip | 527 B | 527 B | ✓ |
Overall change | 1.6 kB | 1.6 kB | ✓ |
Default Build with SWC (Decrease detected ✓)
General Overall increase ⚠️
vercel/next.js canary | ijjk/next.js fix/import-optional-chaining-swc | Change | |
---|---|---|---|
buildDuration | 25.7s | 25.7s | |
buildDurationCached | 7.8s | 7.9s | |
nodeModulesSize | 359 MB | 359 MB |
Page Load Tests Overall decrease ⚠️
vercel/next.js canary | ijjk/next.js fix/import-optional-chaining-swc | Change | |
---|---|---|---|
/ failed reqs | 0 | 0 | ✓ |
/ total time (seconds) | 4.096 | 4.083 | -0.01 |
/ avg req/sec | 610.4 | 612.25 | +1.85 |
/error-in-render failed reqs | 0 | 0 | ✓ |
/error-in-render total time (seconds) | 2.218 | 2.302 | |
/error-in-render avg req/sec | 1127.19 | 1085.8 |
Client Bundles (main, webpack, commons)
vercel/next.js canary | ijjk/next.js fix/import-optional-chaining-swc | Change | |
---|---|---|---|
450.HASH.js gzip | 179 B | 179 B | ✓ |
framework-HASH.js gzip | 42.3 kB | 42.3 kB | ✓ |
main-HASH.js gzip | 27.4 kB | 27.4 kB | ✓ |
webpack-HASH.js gzip | 1.44 kB | 1.44 kB | ✓ |
Overall change | 71.3 kB | 71.3 kB | ✓ |
Legacy Client Bundles (polyfills)
vercel/next.js canary | ijjk/next.js fix/import-optional-chaining-swc | Change | |
---|---|---|---|
polyfills-HASH.js gzip | 31 kB | 31 kB | ✓ |
Overall change | 31 kB | 31 kB | ✓ |
Client Pages
vercel/next.js canary | ijjk/next.js fix/import-optional-chaining-swc | Change | |
---|---|---|---|
_app-HASH.js gzip | 1.35 kB | 1.35 kB | ✓ |
_error-HASH.js gzip | 180 B | 180 B | ✓ |
amp-HASH.js gzip | 305 B | 305 B | ✓ |
css-HASH.js gzip | 321 B | 321 B | ✓ |
dynamic-HASH.js gzip | 2.36 kB | 2.36 kB | ✓ |
head-HASH.js gzip | 342 B | 342 B | ✓ |
hooks-HASH.js gzip | 911 B | 911 B | ✓ |
image-HASH.js gzip | 4.97 kB | 4.97 kB | ✓ |
index-HASH.js gzip | 256 B | 256 B | ✓ |
link-HASH.js gzip | 2.21 kB | 2.21 kB | ✓ |
routerDirect..HASH.js gzip | 314 B | 314 B | ✓ |
script-HASH.js gzip | 375 B | 375 B | ✓ |
withRouter-HASH.js gzip | 309 B | 309 B | ✓ |
85e02e95b279..7e3.css gzip | 107 B | 107 B | ✓ |
Overall change | 14.3 kB | 14.3 kB | ✓ |
Client Build Manifests
vercel/next.js canary | ijjk/next.js fix/import-optional-chaining-swc | Change | |
---|---|---|---|
_buildManifest.js gzip | 459 B | 459 B | ✓ |
Overall change | 459 B | 459 B | ✓ |
Rendered Page Sizes
vercel/next.js canary | ijjk/next.js fix/import-optional-chaining-swc | Change | |
---|---|---|---|
index.html gzip | 533 B | 533 B | ✓ |
link.html gzip | 546 B | 546 B | ✓ |
withRouter.html gzip | 527 B | 527 B | ✓ |
Overall change | 1.61 kB | 1.61 kB | ✓ |
natew
pushed a commit
to natew/next.js
that referenced
this pull request
Feb 16, 2022
This ensures we always transpile optional chaining and nullish coalescing with swc the same as we do [with babel](https://github.com/vercel/next.js/blob/4812e229928dc01ae21ee0533685f6813694c136/packages/next/build/babel/preset.ts#L97-L98) since it can cause issues with webpack even when the node target supports these features. The specific case this seems to cause issues with webpack is when a value is imported and optional chaining is used on the import value webpack is stripping the optional chaining cc @sokra ## Bug - [x] Related issues linked using `fixes #number` - [x] Integration tests added - [ ] Errors have helpful link attached, see `contributing.md` Fixes: vercel#33915
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This ensures we always transpile optional chaining and nullish coalescing with swc the same as we do with babel since it can cause issues with webpack even when the node target supports these features.
The specific case this seems to cause issues with webpack is when a value is imported and optional chaining is used on the import value webpack is stripping the optional chaining cc @sokra
Bug
fixes #number
contributing.md
Fixes: #33915