toggle-case/lib/index.js

Converts strings to alternating case

'use strict';

module.exports = function toggle(text) {
    if (typeof text !== 'string') {
        return '';
    }
    return text.replace(/_|-|\./g, '').split('').map(function (letter, index) {
        if (index % 2 === 0) {
            return letter.toUpperCase();
        }
        return letter.toLowerCase();
    }).join('').trim();
};