Source: apc-abstract/lib/string/decapitalize.js

/**
 * Converter the first letter to lower case.
 * @param {string} value - String to decapitalize.
 * @returns {string} - Decapitalized string.
 * @returns {*|string}
 */
module.exports = function (value) {
    return value && (value.substr(0, 1).toLowerCase() + value.substr(1));
};