Method isDigit

src/AutoNumericHelper.js:164–166

* Return `true` if the given character is a number (0 to 9) * * @param {char} char * @returns {boolean}

(char)

     * @returns {boolean}
     */
    static isDigit(char) {
        return /\d/.test(char);
    }

    /**
     * Return `true` if the parameter is a number (or a number written as a string).