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Added optional locale option. #74

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Added optional locale option. #74

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ed835ad
Added 'locale' option
selimrecep Jul 18, 2020
94aa7f9
Added a test to test 'locale' option
selimrecep Jul 18, 2020
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22 changes: 11 additions & 11 deletions index.js
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@@ -1,6 +1,6 @@
'use strict';

const preserveCamelCase = string => {
const preserveCamelCase = (string, locale) => {
let isLastCharLower = false;
let isLastCharUpper = false;
let isLastLastCharUpper = false;
Expand All @@ -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;
}
}

Expand All @@ -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())
Expand All @@ -54,20 +54,20 @@ 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);
}

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);
};
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2 changes: 2 additions & 0 deletions test.js
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Expand Up @@ -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 => {
Expand Down