How to use the @form-create/utils.isElement function in @form-create/utils

static init(rules, _opt = {}) {
            let opt = isElement(_opt) ? {el: _opt} : _opt;
            let fComponent = new FormCreate(rules, opt);
            let $fCreate = _vue.extend(coreComponent(fComponent, mixin));
            let $vm = new $fCreate().$mount();

            return {
                mount($el) {
                    if ($el && isElement($el))
                        $set(fComponent.options, 'el', $el);

                    fComponent.options.el.appendChild($vm.$el);

                    return fComponent.fCreateApi;
                },
                remove() {
                    fComponent.options.el.removeChild($vm.$el);
                },

function margeGlobal(_options) {
        if (isBool(_options.sumbitBtn))
            $set(_options, 'sumbitBtn', {show: _options.sumbitBtn});
        if (isBool(_options.resetBtn))
            $set(_options, 'resetBtn', {show: _options.resetBtn});
        let options = deepExtend(extend(drive.getConfig(), getBaseConfig()), _options);

        $set(options, 'el', !options.el
            ? window.document.body
            : (isElement(options.el)
                ? options.el
                : document.querySelector(options.el)
            ));

        return options;
    }

mount($el) {
                    if ($el && isElement($el))
                        formCreate.options.el = $el;
                    formCreate.options.el.appendChild($vm.$el);
                    return formCreate.handle.fCreateApi;
                },
                remove() {

data() {
                return {rule: rules, option: isElement(option) ? {el: option} : option};
            },
            render() {

static create(rules, _opt = {}, $parent = undefined) {
            let opt = isElement(_opt) ? {el: _opt} : _opt;
            let fComponent = new FormCreate(rules, opt),
                $vm = fComponent.mount(_vue);
            fComponent.$parent = $parent;
            return fComponent.fCreateApi;
        }

mount($el) {
                    if ($el && isElement($el))
                        $set(fComponent.options, 'el', $el);

                    fComponent.options.el.appendChild($vm.$el);

                    return fComponent.fCreateApi;
                },
                remove() {

function margeGlobal(config, _options) {
        if (isBool(_options.sumbitBtn))
            _options.sumbitBtn = {show: _options.sumbitBtn};

        if (isBool(_options.resetBtn))
            _options.resetBtn = {show: _options.resetBtn};

        let options = deepExtend(config, _options);

        $set(options, 'el', !options.el
            ? window.document.body
            : (isElement(options.el)
                ? options.el
                : document.querySelector(options.el)
            ));

        return options;
    }