Method _addCSSClass

src/AutoNumeric.js:1954–1956

* Add the given CSS class to the DOM element. * * @param {string} cssClassName * @private

(cssClassName)

     * @private
     */
    _addCSSClass(cssClassName) {
        this.domElement.classList.add(cssClassName);
    }

    /**
     * Remove the given CSS class from the DOM element.