text-lower-case/dist.es2015/index.js

Convert text to all lowercase letters

/**
 * Source: ftp://ftp.unicode.org/Public/UCD/latest/ucd/SpecialCasing.txt
 */
const SUPPORTED_LOCALE = {
    tr: {
        regexp: /\u0130|\u0049|\u0049\u0307/g,
        map: {
            İ: "\u0069",
            I: "\u0131",
            İ: "\u0069",
        },
    },
    az: {
        regexp: /\u0130/g,
        map: {
            İ: "\u0069",
            I: "\u0131",
            İ: "\u0069",
        },
    },
    lt: {
        regexp: /\u0049|\u004A|\u012E|\u00CC|\u00CD|\u0128/g,
        map: {
            I: "\u0069\u0307",
            J: "\u006A\u0307",
            Į: "\u012F\u0307",
            Ì: "\u0069\u0307\u0300",
            Í: "\u0069\u0307\u0301",
            Ĩ: "\u0069\u0307\u0303",
        },
    },
};
/**
 * Localized lower case.
 */
export function localeLowerCase(str, locale) {
    // Handle null/undefined inputs gracefully
    if (!str)
        return "";
    const lang = SUPPORTED_LOCALE[locale.toLowerCase()];
    if (lang)
        return lowerCase(str.replace(lang.regexp, (m) => lang.map[m]));
    return lowerCase(str);
}
/**
 * Lower case as a function.
 */
export function lowerCase(str) {
    // Handle null/undefined inputs gracefully
    if (!str)
        return "";
    return str.toLowerCase();
}