From ed835ad6928f08e76ebc16fbf20169c168de8a4e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Recep=20Selim=20A=C4=9F=C4=B1rman?=
 <selimrecep581@gmail.com>
Date: Sun, 19 Jul 2020 00:19:41 +0300
Subject: [PATCH 1/2] Added 'locale' option

I have added optional 'locale' option to `options`
---
 index.js | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/index.js b/index.js
index dd2c490..739feef 100644
--- a/index.js
+++ b/index.js
@@ -1,6 +1,6 @@
 'use strict';
 
-const preserveCamelCase = string => {
+const preserveCamelCase = (string, locale) => {
 	let isLastCharLower = false;
 	let isLastCharUpper = false;
 	let isLastLastCharUpper = false;
@@ -20,9 +20,9 @@ const preserveCamelCase = string => {
 			isLastCharUpper = false;
 			isLastCharLower = true;
 		} else {
-			isLastCharLower = character.toLocaleLowerCase() === character && character.toLocaleUpperCase() !== character;
+			isLastCharLower = character.toLocaleLowerCase(locale) === character && character.toLocaleUpperCase(locale) !== character;
 			isLastLastCharUpper = isLastCharUpper;
-			isLastCharUpper = character.toLocaleUpperCase() === character && character.toLocaleLowerCase() !== character;
+			isLastCharUpper = character.toLocaleUpperCase(locale) === character && character.toLocaleLowerCase(locale) !== character;
 		}
 	}
 
@@ -35,11 +35,11 @@ const camelCase = (input, options) => {
 	}
 
 	options = {
-		...{pascalCase: false},
+		...{pascalCase: false, locale: null},
 		...options
 	};
-
-	const postProcess = x => options.pascalCase ? x.charAt(0).toLocaleUpperCase() + x.slice(1) : x;
+	const locale = (typeof options.locale === 'string') ? options.locale : undefined;
+	const postProcess = x => options.pascalCase ? x.charAt(0).toLocaleUpperCase(locale) + x.slice(1) : x;
 
 	if (Array.isArray(input)) {
 		input = input.map(x => x.trim())
@@ -54,10 +54,10 @@ const camelCase = (input, options) => {
 	}
 
 	if (input.length === 1) {
-		return options.pascalCase ? input.toLocaleUpperCase() : input.toLocaleLowerCase();
+		return options.pascalCase ? input.toLocaleUpperCase(locale) : input.toLocaleLowerCase(locale);
 	}
 
-	const hasUpperCase = input !== input.toLocaleLowerCase();
+	const hasUpperCase = input !== input.toLocaleLowerCase(locale);
 
 	if (hasUpperCase) {
 		input = preserveCamelCase(input);
@@ -65,9 +65,9 @@ const camelCase = (input, options) => {
 
 	input = input
 		.replace(/^[_.\- ]+/, '')
-		.toLocaleLowerCase()
-		.replace(/[_.\- ]+([\p{Alpha}\p{N}_]|$)/gu, (_, p1) => p1.toLocaleUpperCase())
-		.replace(/\d+([\p{Alpha}\p{N}_]|$)/gu, m => m.toLocaleUpperCase());
+		.toLocaleLowerCase(locale)
+		.replace(/[_.\- ]+([\p{Alpha}\p{N}_]|$)/gu, (_, p1) => p1.toLocaleUpperCase(locale))
+		.replace(/\d+([\p{Alpha}\p{N}_]|$)/gu, m => m.toLocaleUpperCase(locale));
 
 	return postProcess(input);
 };

From 94aa7f96e360ea6316bb6e3272136dcbea06f2ae Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Recep=20Selim=20A=C4=9F=C4=B1rman?=
 <selimrecep581@gmail.com>
Date: Sun, 19 Jul 2020 00:20:14 +0300
Subject: [PATCH 2/2] Added a test to test 'locale' option

Added a test to test 'locale' option
---
 test.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/test.js b/test.js
index 4dea4be..d03a553 100644
--- a/test.js
+++ b/test.js
@@ -128,6 +128,8 @@ test('camelCase with pascalCase option', t => {
 	t.is(camelCase('РОЗОВЫЙ_ПУШИСТЫЙ-ЕДИНОРОГИ', {pascalCase: true}), 'РозовыйПушистыйЕдинороги');
 	t.is(camelCase('桑德在这里。', {pascalCase: true}), '桑德在这里。');
 	t.is(camelCase('桑德_在这里。', {pascalCase: true}), '桑德在这里。');
+	t.is(camelCase('run-in-band', {locale: 'tr-TR'}), 'runİnBand');
+	t.is(camelCase('run-in-band', {locale: 'en-US'}), 'runInBand');
 });
 
 test('invalid input', t => {