ESLint Plugin: Disallow <title> in Head from next/document

[housseindjirdeh]

Adds lint rule warning to the Next.js ESLint plugin to disallow <title> in Head imported from next/document.

[ijjk]

Stats from current PR

Default Server Mode (Decrease detected ✓)

General

	vercel/next.js canary	housseindjirdeh/next.js title-in-document-head-eslint-rule	Change
buildDuration	14.3s	14.4s	⚠️ +106ms
buildDurationCached	4.8s	4.5s	-286ms
nodeModulesSize	46.6 MB	46.6 MB	✓

Page Load Tests Overall decrease ⚠️

	vercel/next.js canary	housseindjirdeh/next.js title-in-document-head-eslint-rule	Change
/ failed reqs	0	0	✓
/ total time (seconds)	2.37	2.38	⚠️ +0.01
/ avg req/sec	1054.73	1050.42	⚠️ -4.31
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.261	1.289	⚠️ +0.03
/error-in-render avg req/sec	1982.48	1939.12	⚠️ -43.36

Client Bundles (main, webpack, commons)

	vercel/next.js canary	housseindjirdeh/next.js title-in-document-head-eslint-rule	Change
framework-HASH.js gzip	39.3 kB	39.3 kB	✓
main-HASH.js gzip	19.3 kB	19.3 kB	✓
webpack-HASH.js gzip	996 B	996 B	✓
Overall change	59.6 kB	59.6 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	housseindjirdeh/next.js title-in-document-head-eslint-rule	Change
polyfills-HASH.js gzip	31.1 kB	31.1 kB	✓
Overall change	31.1 kB	31.1 kB	✓

Client Pages

	vercel/next.js canary	housseindjirdeh/next.js title-in-document-head-eslint-rule	Change
_app-HASH.js gzip	1.02 kB	1.02 kB	✓
_error-HASH.js gzip	3.05 kB	3.05 kB	✓
amp-HASH.js gzip	526 B	526 B	✓
css-HASH.js gzip	334 B	334 B	✓
hooks-HASH.js gzip	890 B	890 B	✓
index-HASH.js gzip	262 B	262 B	✓
link-HASH.js gzip	1.65 kB	1.65 kB	✓
routerDirect..HASH.js gzip	331 B	331 B	✓
withRouter-HASH.js gzip	329 B	329 B	✓
99a142a5cfae..804.css gzip	125 B	125 B	✓
Overall change	8.52 kB	8.52 kB	✓

Client Build Manifests

	vercel/next.js canary	housseindjirdeh/next.js title-in-document-head-eslint-rule	Change
_buildManifest.js gzip	394 B	394 B	✓
Overall change	394 B	394 B	✓

Rendered Page Sizes

	vercel/next.js canary	housseindjirdeh/next.js title-in-document-head-eslint-rule	Change
index.html gzip	560 B	560 B	✓
link.html gzip	569 B	569 B	✓
withRouter.html gzip	557 B	557 B	✓
Overall change	1.69 kB	1.69 kB	✓

---

Serverless Mode

General

	vercel/next.js canary	housseindjirdeh/next.js title-in-document-head-eslint-rule	Change
buildDuration	17.7s	17.7s	⚠️ +5ms
buildDurationCached	6.6s	6.7s	⚠️ +101ms
nodeModulesSize	46.6 MB	46.6 MB	✓

Client Bundles (main, webpack, commons)

	vercel/next.js canary	housseindjirdeh/next.js title-in-document-head-eslint-rule	Change
framework-HASH.js gzip	39.3 kB	39.3 kB	✓
main-HASH.js gzip	19.3 kB	19.3 kB	✓
webpack-HASH.js gzip	996 B	996 B	✓
Overall change	59.6 kB	59.6 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	housseindjirdeh/next.js title-in-document-head-eslint-rule	Change
polyfills-HASH.js gzip	31.1 kB	31.1 kB	✓
Overall change	31.1 kB	31.1 kB	✓

Client Pages

	vercel/next.js canary	housseindjirdeh/next.js title-in-document-head-eslint-rule	Change
_app-HASH.js gzip	1.02 kB	1.02 kB	✓
_error-HASH.js gzip	3.05 kB	3.05 kB	✓
amp-HASH.js gzip	526 B	526 B	✓
css-HASH.js gzip	334 B	334 B	✓
hooks-HASH.js gzip	890 B	890 B	✓
index-HASH.js gzip	262 B	262 B	✓
link-HASH.js gzip	1.65 kB	1.65 kB	✓
routerDirect..HASH.js gzip	331 B	331 B	✓
withRouter-HASH.js gzip	329 B	329 B	✓
99a142a5cfae..804.css gzip	125 B	125 B	✓
Overall change	8.52 kB	8.52 kB	✓

Client Build Manifests

	vercel/next.js canary	housseindjirdeh/next.js title-in-document-head-eslint-rule	Change
_buildManifest.js gzip	394 B	394 B	✓
Overall change	394 B	394 B	✓

Serverless bundles

	vercel/next.js canary	housseindjirdeh/next.js title-in-document-head-eslint-rule	Change
_error.js	1.34 MB	1.34 MB	✓
404.html	2.42 kB	2.42 kB	✓
500.html	2.41 kB	2.41 kB	✓
amp.amp.html	10.8 kB	10.8 kB	✓
amp.html	1.61 kB	1.61 kB	✓
css.html	1.79 kB	1.79 kB	✓
hooks.html	1.67 kB	1.67 kB	✓
index.js	1.35 MB	1.35 MB	✓
link.js	1.4 MB	1.4 MB	✓
routerDirect.js	1.39 MB	1.39 MB	✓
withRouter.js	1.39 MB	1.39 MB	✓
Overall change	6.9 MB	6.9 MB	✓

---

Webpack 4 Mode (Decrease detected ✓)

General

	vercel/next.js canary	housseindjirdeh/next.js title-in-document-head-eslint-rule	Change
buildDuration	12.3s	12.3s	⚠️ +18ms
buildDurationCached	5.2s	5.1s	-44ms
nodeModulesSize	46.6 MB	46.6 MB	✓

Page Load Tests Overall decrease ⚠️

	vercel/next.js canary	housseindjirdeh/next.js title-in-document-head-eslint-rule	Change
/ failed reqs	0	0	✓
/ total time (seconds)	2.428	2.472	⚠️ +0.04
/ avg req/sec	1029.61	1011.13	⚠️ -18.48
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.231	1.292	⚠️ +0.06
/error-in-render avg req/sec	2031.03	1935.1	⚠️ -95.93

Client Bundles (main, webpack, commons)

	vercel/next.js canary	housseindjirdeh/next.js title-in-document-head-eslint-rule	Change
677f882d2ed8..HASH.js gzip	13.3 kB	13.3 kB	✓
framework.HASH.js gzip	39 kB	39 kB	✓
main-HASH.js gzip	7.19 kB	7.19 kB	✓
webpack-HASH.js gzip	751 B	751 B	✓
Overall change	60.2 kB	60.2 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	housseindjirdeh/next.js title-in-document-head-eslint-rule	Change
polyfills-HASH.js gzip	31.3 kB	31.3 kB	✓
Overall change	31.3 kB	31.3 kB	✓

Client Pages

	vercel/next.js canary	housseindjirdeh/next.js title-in-document-head-eslint-rule	Change
_app-HASH.js gzip	1.28 kB	1.28 kB	✓
_error-HASH.js gzip	3.72 kB	3.72 kB	✓
amp-HASH.js gzip	536 B	536 B	✓
css-HASH.js gzip	339 B	339 B	✓
hooks-HASH.js gzip	887 B	887 B	✓
index-HASH.js gzip	227 B	227 B	✓
link-HASH.js gzip	1.64 kB	1.64 kB	✓
routerDirect..HASH.js gzip	303 B	303 B	✓
withRouter-HASH.js gzip	302 B	302 B	✓
21c68fa65a48..217.css gzip	125 B	125 B	✓
Overall change	9.37 kB	9.37 kB	✓

Client Build Manifests

	vercel/next.js canary	housseindjirdeh/next.js title-in-document-head-eslint-rule	Change
_buildManifest.js gzip	420 B	420 B	✓
Overall change	420 B	420 B	✓

Rendered Page Sizes

	vercel/next.js canary	housseindjirdeh/next.js title-in-document-head-eslint-rule	Change
index.html gzip	613 B	613 B	✓
link.html gzip	620 B	620 B	✓
withRouter.html gzip	606 B	606 B	✓
Overall change	1.84 kB	1.84 kB	✓

Commit: 82c70a1