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[examples] Update styled-components to use SWC #34770

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merged 11 commits into from Mar 2, 2022
Merged

[examples] Update styled-components to use SWC #34770

merged 11 commits into from Mar 2, 2022

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Skagoo
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@Skagoo Skagoo commented Feb 24, 2022

Since Next.js 12.1 we have improved SWC support, which removes the dependency of Babel to work with Styled Components within Next.js.

This PR:

  • updates relavant documentation and references, including to old examples
  • renames an existing example with-styled-components (using Babel) to with-styled-components-babel
  • updates and existing example with-typescript-styled-components combining TypeScript and Styled Components to work with SWC
  • provides a new example with-styled-components using SWC instead of Babel

@ijjk ijjk added area: documentation examples Issue/PR related to examples labels Feb 24, 2022
leerob
leerob reviewed Feb 25, 2022
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leerob
leerob reviewed Feb 25, 2022
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Thank you so much! This is looking great. One last change.

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@Skagoo
update readme for with-styled-components-babel
98a0650 
remove Notes section since it describes a workaround which is no longer
required to work with `next/link`.
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Skagoo commented Feb 25, 2022

Great, I removed the notes section as requested for the with-styled-components-babel example
Commit: 98a0650

@Skagoo Skagoo requested a review from leerob February 25, 2022 09:22
@leerob leerob changed the title Styled components swc [examples] Update styled-components to use SWC Feb 26, 2022
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ijjk commented Feb 26, 2022

Failing test suites

Commit: 503bbbc

yarn testheadless test/integration/image-component/default/test/index.test.js

  • Image Component Tests > dev mode > should warn at most once even after state change
  • Image Component Tests > dev mode > should be valid W3C HTML
  • Image Component Tests > server mode > should be valid W3C HTML
Expand output

● Image Component Tests › dev mode › should warn at most once even after state change

expect(received).toMatch(expected)

Matcher error: received value must be a string

Received has value: undefined

  838 |         'Image with src "/test.png" has "sizes" property but it will be ignored.'
  839 |       )
> 840 |       expect(warnings[1]).toMatch(
      |                           ^
  841 |         'Image with src "/test.png" was detected as the Largest Contentful Paint (LCP).'
  842 |       )
  843 |       expect(warnings.length).toBe(2)

  at Object.<anonymous> (integration/image-component/default/test/index.test.js:840:27)

● Image Component Tests › dev mode › should be valid W3C HTML

Validator returned unexpected statuscode: 503

  at Request._callback (../node_modules/html-validator/lib/w3c-validator.js:15:23)
  at Request.self.callback (../node_modules/request/request.js:185:22)
  at Request.<anonymous> (../node_modules/request/request.js:1154:10)
  at IncomingMessage.<anonymous> (../node_modules/request/request.js:1076:12)

● Image Component Tests › server mode › should be valid W3C HTML

Validator returned unexpected statuscode: 503

  at Request._callback (../node_modules/html-validator/lib/w3c-validator.js:15:23)
  at Request.self.callback (../node_modules/request/request.js:185:22)
  at Request.<anonymous> (../node_modules/request/request.js:1154:10)
  at IncomingMessage.<anonymous> (../node_modules/request/request.js:1076:12)

Read more about building and testing Next.js in contributing.md.

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Skagoo commented Mar 1, 2022

What's the status on this? Are any changes required for my part?

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There have been a few flaky tests that are fixed, if tests will pass again, this should be merged automatically now. 👍

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ijjk commented Mar 1, 2022

Stats from current PR

Default Build (Increase detected ⚠️)
General Overall decrease ✓
vercel/next.js canary Skagoo/next.js styled-components-swc Change
buildDuration 19.4s 19.5s ⚠️ +133ms
buildDurationCached 7.5s 7.6s ⚠️ +104ms
nodeModulesSize 372 MB 372 MB -14 B
Page Load Tests Overall increase ✓
vercel/next.js canary Skagoo/next.js styled-components-swc Change
/ failed reqs 0 0 ✓
/ total time (seconds) 4.268 4.198 -0.07
/ avg req/sec 585.71 595.46 +9.75
/error-in-render failed reqs 0 0 ✓
/error-in-render total time (seconds) 2.017 2.005 -0.01
/error-in-render avg req/sec 1239.46 1247.1 +7.64
Client Bundles (main, webpack)
vercel/next.js canary Skagoo/next.js styled-components-swc Change
450.HASH.js gzip 179 B 179 B ✓
framework-HASH.js gzip 42 kB 42 kB ✓
main-HASH.js gzip 27.9 kB 27.9 kB ✓
webpack-HASH.js gzip 1.44 kB 1.44 kB ✓
Overall change 71.5 kB 71.5 kB ✓
Legacy Client Bundles (polyfills)
vercel/next.js canary Skagoo/next.js styled-components-swc Change
polyfills-HASH.js gzip 31 kB 31 kB ✓
Overall change 31 kB 31 kB ✓
Client Pages
vercel/next.js canary Skagoo/next.js styled-components-swc Change
_app-HASH.js gzip 1.36 kB 1.36 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 2.57 kB 2.57 kB ✓
head-HASH.js gzip 350 B 350 B ✓
hooks-HASH.js gzip 919 B 919 B ✓
image-HASH.js gzip 5.05 kB 5.05 kB ✓
index-HASH.js gzip 263 B 263 B ✓
link-HASH.js gzip 2.26 kB 2.26 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 14.7 kB 14.7 kB ✓
Client Build Manifests
vercel/next.js canary Skagoo/next.js styled-components-swc Change
_buildManifest.js gzip 459 B 459 B ✓
Overall change 459 B 459 B ✓
Rendered Page Sizes
vercel/next.js canary Skagoo/next.js styled-components-swc Change
index.html gzip 531 B 531 B ✓
link.html gzip 544 B 544 B ✓
withRouter.html gzip 526 B 526 B ✓
Overall change 1.6 kB 1.6 kB ✓
Default Build with SWC (Increase detected ⚠️)
General Overall decrease ✓
vercel/next.js canary Skagoo/next.js styled-components-swc Change
buildDuration 24.3s 24.5s ⚠️ +178ms
buildDurationCached 7.8s 7.5s -327ms
nodeModulesSize 372 MB 372 MB -14 B
Page Load Tests Overall increase ✓
vercel/next.js canary Skagoo/next.js styled-components-swc Change
/ failed reqs 0 0 ✓
/ total time (seconds) 4.261 4.19 -0.07
/ avg req/sec 586.65 596.62 +9.97
/error-in-render failed reqs 0 0 ✓
/error-in-render total time (seconds) 2.035 1.99 -0.05
/error-in-render avg req/sec 1228.3 1256.05 +27.75
Client Bundles (main, webpack)
vercel/next.js canary Skagoo/next.js styled-components-swc Change
450.HASH.js gzip 179 B 179 B ✓
framework-HASH.js gzip 42.3 kB 42.3 kB ✓
main-HASH.js gzip 28.1 kB 28.1 kB ✓
webpack-HASH.js gzip 1.45 kB 1.45 kB ✓
Overall change 72.1 kB 72.1 kB ✓
Legacy Client Bundles (polyfills)
vercel/next.js canary Skagoo/next.js styled-components-swc Change
polyfills-HASH.js gzip 31 kB 31 kB ✓
Overall change 31 kB 31 kB ✓
Client Pages
vercel/next.js canary Skagoo/next.js styled-components-swc Change
_app-HASH.js gzip 1.36 kB 1.36 kB ✓
_error-HASH.js gzip 180 B 180 B ✓
amp-HASH.js gzip 313 B 313 B ✓
css-HASH.js gzip 326 B 326 B ✓
dynamic-HASH.js gzip 2.56 kB 2.56 kB ✓
head-HASH.js gzip 350 B 350 B ✓
hooks-HASH.js gzip 921 B 921 B ✓
image-HASH.js gzip 5.2 kB 5.2 kB ✓
index-HASH.js gzip 261 B 261 B ✓
link-HASH.js gzip 2.33 kB 2.33 kB ✓
routerDirect..HASH.js gzip 321 B 321 B ✓
script-HASH.js gzip 386 B 386 B ✓
withRouter-HASH.js gzip 317 B 317 B ✓
85e02e95b279..7e3.css gzip 107 B 107 B ✓
Overall change 14.9 kB 14.9 kB ✓
Client Build Manifests
vercel/next.js canary Skagoo/next.js styled-components-swc Change
_buildManifest.js gzip 456 B 456 B ✓
Overall change 456 B 456 B ✓
Rendered Page Sizes
vercel/next.js canary Skagoo/next.js styled-components-swc Change
index.html gzip 530 B 530 B ✓
link.html gzip 543 B 543 B ✓
withRouter.html gzip 527 B 527 B ✓
Overall change 1.6 kB 1.6 kB ✓
Commit: 80a6bc9

@balazsorban44 balazsorban44 merged commit b579a35 into vercel:canary Mar 2, 2022
@dawidk92
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dawidk92 commented Mar 3, 2022

@Skagoo @leerob @balazsorban44 I found a bug. When you run build and then start it doesn't have pre-rendered styles. Especially you can see this when you disable javascript through dev tools - it shows plain HTML without styles

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Skagoo commented Mar 3, 2022

@dawidk92 I completely overlooked this, my bad. I did take a look now and I'm quite doubtfull (according to docs) that I missed something in the example setup.
I did some tests using the styledComponents flag under experimental too, with the same results.

Do we have tests that prove the correct/working implementation of how SWC handles the SSR of StyledComponents?

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chemicalkosek commented Mar 8, 2022 •
edited

Why was custom _document.js deleted from this example?
I have tested swc with styled-components without _document.js and I see FOUC (Flash of unstyled content).
I don't see that happening when there's _document.js

I have created a PR to fix that: #35163

@balazsorban44 balazsorban44 mentioned this pull request Mar 10, 2022
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