Method _hasFormHandlerFunction

src/AutoNumeric.js:1413–1415

* Return `true` if the given form element, or if none are passed, the current `this.parentForm` one has a form handler name. * * @param {HTMLFormElement|null} formElement * @returns {boolean} * @private

(formElement = null)

     * @private
     */
    _hasFormHandlerFunction(formElement = null) {
        return 'anFormHandler' in this._getFormElement(formElement).dataset;
    }

    /**
     * Return the given form element, or defaults to `this.parentForm` if no argument is passed.