Deprecation warning for config.analyticsId

[feugy]

 🧐 What's in there?

config.analyticsId is a rarely-used mechanism, initially intended to Next.js users hosting their application themselves and willing to report Core Web Vitals to Vercel Speed Insights.

This platform specific mechanism can be replaced with the built-in useReportWebVitals.

🧪 How to test?

1. make a new Next.js app
2. define env variable VERCEL_ANALYTICS_ID to a dummy value
3. start your application in dev mode:

   ⚠ config.analyticsId is deprecated and will be removed in next major version. Read more: https://nextjs.org/docs/messages/deprecated-analyticsid
   
      ▲ Next.js 14.0.5-canary.58
      - Local:        http://localhost:3000
    ✓ Ready in 917ms

4. build your application:

      ▲ Next.js 14.0.5-canary.58
   
      Creating an optimized production build ...
    ✓ Compiled successfully
      Linting and checking validity of types  .
    ⚠ The Next.js plugin was not detected in your ESLint configuration. See https://nextjs.org/docs/basic-features/eslint#migrating-existing-config
    ✓ Linting and checking validity of types
    ✓ Collecting page data
    ✓ Generating static pages (4/4)
    ⚠ `config.analyticsId` is deprecated and will be removed in next major version. Read more: https://nextjs.org/docs/messages/deprecated-analyticsid

5. remove the env variable, add a next.config.js file with a dummy analyticsId variable:

   module.exports = { analyticsId: "UA-12345678-9" };

6. start your application in dev mode: it'll issue the same warning.
7. build your application: it'll issue the same warning.

[ijjk]

Allow CI Workflow Run

• approve CI run for commit: 7e6bc1a

Note: this should only be enabled once the PR is ready to go and can only be enabled by a maintainer

[ijjk]

Allow CI Workflow Run

• approve CI run for commit: 7e6bc1a

Note: this should only be enabled once the PR is ready to go and can only be enabled by a maintainer

[ijjk]

Allow CI Workflow Run

• approve CI run for commit: 69a8a82

Note: this should only be enabled once the PR is ready to go and can only be enabled by a maintainer

[timneutkens]

We have a test suite for the env var: https://github.com/vercel/next.js/blob/e35033cfbc1e8f6d089726e594d6cfb26c3ba1e4/test/e2e/app-dir/app/vercel-speed-insights.test.ts

You can add a test there for stdout / stderr to make sure the warning is logged correctly in both environments 👍

[ijjk]

Tests Passed

[ijjk]

Stats from current PR

Default Build

General Overall increase ⚠️

	vercel/next.js canary	feugy/next.js damien/aly-1157-add-deprecation-notice-for-the-automatic-speed-insights	Change
buildDuration	11.8s	11.7s	N/A
buildDurationCached	6s	5s	N/A
nodeModulesSize	200 MB	200 MB	⚠️ +1.94 kB
nextStartRea..uration (ms)	429ms	432ms	N/A

Client Bundles (main, webpack)

	vercel/next.js canary	feugy/next.js damien/aly-1157-add-deprecation-notice-for-the-automatic-speed-insights	Change
193.HASH.js gzip	181 B	182 B	N/A
3f784ff6-HASH.js gzip	53.4 kB	53.4 kB	✓
433-HASH.js gzip	29 kB	29 kB	N/A
framework-HASH.js gzip	45.2 kB	45.2 kB	✓
main-app-HASH.js gzip	239 B	243 B	N/A
main-HASH.js gzip	31.8 kB	31.8 kB	N/A
webpack-HASH.js gzip	1.7 kB	1.7 kB	N/A
Overall change	98.6 kB	98.6 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	feugy/next.js damien/aly-1157-add-deprecation-notice-for-the-automatic-speed-insights	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	feugy/next.js damien/aly-1157-add-deprecation-notice-for-the-automatic-speed-insights	Change
_app-HASH.js gzip	194 B	195 B	N/A
_error-HASH.js gzip	183 B	181 B	N/A
amp-HASH.js gzip	504 B	502 B	N/A
css-HASH.js gzip	321 B	321 B	✓
dynamic-HASH.js gzip	2.5 kB	2.5 kB	N/A
edge-ssr-HASH.js gzip	255 B	253 B	N/A
head-HASH.js gzip	350 B	349 B	N/A
hooks-HASH.js gzip	369 B	369 B	✓
image-HASH.js gzip	4.18 kB	4.18 kB	N/A
index-HASH.js gzip	255 B	256 B	N/A
link-HASH.js gzip	2.61 kB	2.61 kB	✓
routerDirect..HASH.js gzip	312 B	311 B	N/A
script-HASH.js gzip	385 B	383 B	N/A
withRouter-HASH.js gzip	307 B	308 B	N/A
1afbb74e6ecf..834.css gzip	106 B	106 B	✓
Overall change	3.4 kB	3.4 kB	✓

Client Build Manifests

	vercel/next.js canary	feugy/next.js damien/aly-1157-add-deprecation-notice-for-the-automatic-speed-insights	Change
_buildManifest.js gzip	484 B	485 B	N/A
Overall change	0 B	0 B	✓

Rendered Page Sizes

	vercel/next.js canary	feugy/next.js damien/aly-1157-add-deprecation-notice-for-the-automatic-speed-insights	Change
index.html gzip	528 B	528 B	✓
link.html gzip	540 B	540 B	✓
withRouter.html gzip	523 B	523 B	✓
Overall change	1.59 kB	1.59 kB	✓

Edge SSR bundle Size

	vercel/next.js canary	feugy/next.js damien/aly-1157-add-deprecation-notice-for-the-automatic-speed-insights	Change
edge-ssr.js gzip	94 kB	94 kB	N/A
page.js gzip	148 kB	148 kB	N/A
Overall change	0 B	0 B	✓

Middleware size

	vercel/next.js canary	feugy/next.js damien/aly-1157-add-deprecation-notice-for-the-automatic-speed-insights	Change
middleware-b..fest.js gzip	625 B	627 B	N/A
middleware-r..fest.js gzip	151 B	151 B	✓
middleware.js gzip	37.5 kB	37.5 kB	N/A
edge-runtime..pack.js gzip	1.92 kB	1.92 kB	✓
Overall change	2.07 kB	2.07 kB	✓

Next Runtimes

	vercel/next.js canary	feugy/next.js damien/aly-1157-add-deprecation-notice-for-the-automatic-speed-insights	Change
app-page-exp...dev.js gzip	169 kB	169 kB	✓
app-page-exp..prod.js gzip	95.6 kB	95.6 kB	✓
app-page-tur..prod.js gzip	96.3 kB	96.3 kB	✓
app-page-tur..prod.js gzip	90.8 kB	90.8 kB	✓
app-page.run...dev.js gzip	142 kB	142 kB	✓
app-page.run..prod.js gzip	90.2 kB	90.2 kB	✓
app-route-ex...dev.js gzip	24.2 kB	24.2 kB	✓
app-route-ex..prod.js gzip	16.8 kB	16.8 kB	✓
app-route-tu..prod.js gzip	16.8 kB	16.8 kB	✓
app-route-tu..prod.js gzip	16.4 kB	16.4 kB	✓
app-route.ru...dev.js gzip	23.6 kB	23.6 kB	✓
app-route.ru..prod.js gzip	16.4 kB	16.4 kB	✓
pages-api-tu..prod.js gzip	9.39 kB	9.39 kB	✓
pages-api.ru...dev.js gzip	9.67 kB	9.67 kB	✓
pages-api.ru..prod.js gzip	9.39 kB	9.39 kB	✓
pages-turbo...prod.js gzip	22 kB	22 kB	✓
pages.runtim...dev.js gzip	22.6 kB	22.6 kB	✓
pages.runtim..prod.js gzip	22 kB	22 kB	✓
server.runti..prod.js gzip	49.7 kB	49.7 kB	✓
Overall change	943 kB	943 kB	✓

Diff details

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Commit: bc1538c