Function isString

MathBox/mathbox-bundle.js:37693–37696

* Checks if `value` is a string. * * @static * @memberOf _ * @category Objects * @param {*} value The value to check. * @returns {boolean} Returns `true` if the `value` is a string, else `false`. * @example * * _.isString('fred'); * // => true

(value)

     * // => true
     */
    function isString(value) {
      return typeof value == 'string' ||
        value && typeof value == 'object' && toString.call(value) == stringClass || false;
    }

    /**
     * Checks if `value` is `undefined`.