Add a swc transform for removal of console.* calls.

[losfair]

Fixes #31332.

Adds a experimental.removeConsole config entry that allows to remove all console.* calls. Similar to babel-plugin-transform-remove-console.

Example next.config.js:

• Suppress console output except console.error:

module.exports = {
  experimental: {
    removeConsole: {
      exclude: ['error'],
    },
  },
}

• Suppress all console output:

module.exports = {
  experimental: {
    removeConsole: true,
  },
}

Bug

• Related issues linked using fixes #number
• Integration tests added
• Errors have helpful link attached, see contributing.md

Feature

• Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
• Related issues linked using fixes #number
• Integration tests added
• Documentation added
• Telemetry added. In case of a feature if it's used or not.
• Errors have helpful link attached, see contributing.md

Documentation / Examples

• Make sure the linting passes by running yarn lint

[kdy1]

I found some tiny issues.

[kdy1]

LGTM. Nice work!

[ijjk]

Stats from current PR

Default Build (Increase detected ⚠️)

General Overall increase ⚠️

	vercel/next.js canary	losfair/next.js remove-console	Change
buildDuration	23s	23.5s	⚠️ +450ms
buildDurationCached	4.7s	4.4s	-278ms
nodeModulesSize	336 MB	336 MB	⚠️ +477 B

Page Load Tests Overall increase ✓

	vercel/next.js canary	losfair/next.js remove-console	Change
/ failed reqs	0	0	✓
/ total time (seconds)	3.858	3.882	⚠️ +0.02
/ avg req/sec	648.02	644.02	⚠️ -4
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	2.19	2.035	-0.15
/error-in-render avg req/sec	1141.35	1228.36	+87.01

Client Bundles (main, webpack, commons)

	vercel/next.js canary	losfair/next.js remove-console	Change
450.HASH.js gzip	179 B	179 B	✓
framework-HASH.js gzip	42.2 kB	42.2 kB	✓
main-HASH.js gzip	28.3 kB	28.3 kB	✓
webpack-HASH.js gzip	1.45 kB	1.45 kB	✓
Overall change	72.2 kB	72.2 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	losfair/next.js remove-console	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	losfair/next.js remove-console	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	327 B	327 B	✓
dynamic-HASH.js gzip	2.38 kB	2.38 kB	✓
head-HASH.js gzip	350 B	350 B	✓
hooks-HASH.js gzip	635 B	635 B	✓
image-HASH.js gzip	4.44 kB	4.44 kB	✓
index-HASH.js gzip	263 B	263 B	✓
link-HASH.js gzip	1.87 kB	1.87 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	13.3 kB	13.3 kB	✓

Client Build Manifests

	vercel/next.js canary	losfair/next.js remove-console	Change
_buildManifest.js gzip	460 B	460 B	✓
Overall change	460 B	460 B	✓

Rendered Page Sizes

	vercel/next.js canary	losfair/next.js remove-console	Change
index.html gzip	523 B	523 B	✓
link.html gzip	536 B	536 B	✓
withRouter.html gzip	517 B	517 B	✓
Overall change	1.58 kB	1.58 kB	✓

---

Default Build with SWC (Decrease detected ✓)

General Overall increase ⚠️

	vercel/next.js canary	losfair/next.js remove-console	Change
buildDuration	26.2s	25.4s	-762ms
buildDurationCached	4.7s	4.6s	-13ms
nodeModulesSize	336 MB	336 MB	⚠️ +477 B

Page Load Tests Overall decrease ⚠️

	vercel/next.js canary	losfair/next.js remove-console	Change
/ failed reqs	0	0	✓
/ total time (seconds)	3.932	3.914	-0.02
/ avg req/sec	635.86	638.76	+2.9
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	2.109	2.199	⚠️ +0.09
/error-in-render avg req/sec	1185.18	1136.77	⚠️ -48.41

Client Bundles (main, webpack, commons)

	vercel/next.js canary	losfair/next.js remove-console	Change
450.HASH.js gzip	179 B	179 B	✓
framework-HASH.js gzip	42.3 kB	42.3 kB	✓
main-HASH.js gzip	28.5 kB	28.5 kB	✓
webpack-HASH.js gzip	1.44 kB	1.44 kB	✓
Overall change	72.5 kB	72.5 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	losfair/next.js remove-console	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	losfair/next.js remove-console	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	2.38 kB	2.38 kB	✓
head-HASH.js gzip	342 B	342 B	✓
hooks-HASH.js gzip	622 B	622 B	✓
image-HASH.js gzip	4.46 kB	4.46 kB	✓
index-HASH.js gzip	256 B	256 B	✓
link-HASH.js gzip	1.91 kB	1.91 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	13.2 kB	13.2 kB	✓

Client Build Manifests

	vercel/next.js canary	losfair/next.js remove-console	Change
_buildManifest.js gzip	460 B	460 B	✓
Overall change	460 B	460 B	✓

Rendered Page Sizes

	vercel/next.js canary	losfair/next.js remove-console	Change
index.html gzip	524 B	524 B	✓
link.html gzip	535 B	535 B	✓
withRouter.html gzip	517 B	517 B	✓
Overall change	1.58 kB	1.58 kB	✓

Commit: db89be9

[timneutkens]

Awesome work @losfair 👍