refactor(core): Use Intl native API to get locale direction, remove rtl-detect depend… (#10798)

Author: slorber

packages/docusaurus/package.json

@@ -66,7 +66,6 @@
     "react-router": "^5.3.4",
     "react-router-config": "^5.1.1",
     "react-router-dom": "^5.3.4",
-    "rtl-detect": "^1.0.4",
     "semver": "^7.5.4",
     "serve-handler": "^6.1.6",
     "shelljs": "^0.8.5",
@@ -84,7 +83,6 @@
     "@types/detect-port": "^1.3.3",
     "@types/react-dom": "^18.2.7",
     "@types/react-router-config": "^5.0.7",
-    "@types/rtl-detect": "^1.0.0",
     "@types/serve-handler": "^6.1.4",
     "@types/update-notifier": "^6.0.4",
     "@types/webpack-bundle-analyzer": "^4.7.0",

packages/docusaurus/src/server/i18n.ts

@@ -6,7 +6,6 @@
  */
 
 import logger from '@docusaurus/logger';
-import {getLangDir} from 'rtl-detect';
 import type {I18n, DocusaurusConfig, I18nLocaleConfig} from '@docusaurus/types';
 import type {LoadContextParams} from './site';
 
@@ -69,11 +68,21 @@ function getDefaultCalendar(localeStr: string) {
   return 'gregory';
 }
 
+function getDefaultDirection(localeStr: string) {
+  const locale = new Intl.Locale(localeStr);
+  // see https://github.com/tc39/proposal-intl-locale-info
+  // see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/Locale/getTextInfo
+  // Node 18.0 implements a former version of the getTextInfo() proposal
+  // @ts-expect-error: The TC39 proposal was updated
+  const textInto = locale.getTextInfo?.() ?? locale.textInfo;
+  return textInto.direction;
+}
+
 export function getDefaultLocaleConfig(locale: string): I18nLocaleConfig {
   try {
     return {
       label: getDefaultLocaleLabel(locale),
-      direction: getLangDir(locale),
+      direction: getDefaultDirection(locale),
       htmlLang: locale,
       calendar: getDefaultCalendar(locale),
       path: locale,

yarn.lock

@@ -4259,11 +4259,6 @@
   resolved "https://registry.yarnpkg.com/@types/retry/-/retry-0.12.0.tgz#2b35eccfcee7d38cd72ad99232fbd58bffb3c84d"
   integrity sha512-wWKOClTTiizcZhXnPY4wikVAwmdYHp8q6DmC+EJUzAMsycb7HB32Kh9RN4+0gExjmPmZSAQjgURXIGATPegAvA==
 
-"@types/rtl-detect@^1.0.0":
-  version "1.0.3"
-  resolved "https://registry.yarnpkg.com/@types/rtl-detect/-/rtl-detect-1.0.3.tgz#2b9849ece923d767712e95efa01ca75724de0de5"
-  integrity sha512-qpstuHivwg/HoXxRrBo5/r/OVx5M2SkqJpVu2haasdLctt+jMGHWjqdbI0LL7Rk2wRmN/UHdHK4JZg9RUMcvKA==
-
 "@types/rtlcss@^3.5.1":
   version "3.5.4"
   resolved "https://registry.yarnpkg.com/@types/rtlcss/-/rtlcss-3.5.4.tgz#8db1e02fe911cf5b71f4cb42dafce8ccaef8e1e1"
@@ -15899,11 +15894,6 @@ rslog@^1.2.3:
   resolved "https://registry.yarnpkg.com/rslog/-/rslog-1.2.3.tgz#9114d93056312fbe35c11b3fea3f2774a7debe56"
   integrity sha512-antALPJaKBRPBU1X2q9t085K4htWDOOv/K1qhTUk7h0l1ePU/KbDqKJn19eKP0dk7PqMioeA0+fu3gyPXCsXxQ==
 
-rtl-detect@^1.0.4:
-  version "1.1.2"
-  resolved "https://registry.yarnpkg.com/rtl-detect/-/rtl-detect-1.1.2.tgz#ca7f0330af5c6bb626c15675c642ba85ad6273c6"
-  integrity sha512-PGMBq03+TTG/p/cRB7HCLKJ1MgDIi07+QU1faSjiYRfmY5UsAttV9Hs08jDAHVwcOwmVLcSJkpwyfXszVjWfIQ==
-
 rtlcss@^4.1.0:
   version "4.3.0"
   resolved "https://registry.yarnpkg.com/rtlcss/-/rtlcss-4.3.0.tgz#f8efd4d5b64f640ec4af8fa25b65bacd9e07cc97"