swap-case/dist/index.js

Transform a string by swapping every character from upper to lower case, or lower to upper case

export function swapCase(input, locale) {
    let result = "";
    for (const char of input) {
        const lower = char.toLocaleLowerCase(locale);
        result += char === lower ? char.toLocaleUpperCase(locale) : lower;
    }
    return result;
}
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