Google reCaptcha v2

      document.addEventListener("DOMContentLoaded", () => {
    if (typeof grecaptcha === "undefined") {
        let script = document.createElement('script');
        script.src = 'https://www.google.com/recaptcha/api.js?&render=explicit';
        script.onload = renderWait;
        script.setAttribute('async', '');
        script.setAttribute('defer', '');
        document.body.append(script);
    } else {
        render();
    }
    function renderWait() {
        setTimeout(() => {
            if (typeof grecaptcha !== "undefined" && typeof grecaptcha.render !== "undefined") {
                render();
            } else {
                renderWait();
            }
        }, 200);
    }
    function render() {
        window.GR_V2_SITEKEY = "<?= GR_V2_SITEKEY;?>";
        console.info('КЛЮЧ:', GR_V2_SITEKEY);
    }
});
    

      form.addEventListener("submit", function(e) {
    let _this = this;
    let widget = null;
    if (_th.checkForm(form)) {
        // console.log('заполнено');
        event.preventDefault();
        widget = grecaptcha.render(_this.querySelector('#g-recaptcha'), {
            sitekey: GR_V2_SITEKEY,
            callback: response => {
                // console.log("FORM FEEDBACK | RESPONSE | PAGE ", response);
                if (response) {
                    // console.log('капча пройдена успешно')
                    t(_this);
                    grecaptcha.reset(widget)
                    _this.querySelector('#g-recaptcha').remove();
                    _this.insertAdjacentHTML('afterbegin', '<div id="g-recaptcha" data-size="invisible"></div>');
                    widget = null;
                } else {
                    // console.log('капча не пройдена')
                    event.preventDefault();
                }
            }
        });
        grecaptcha.execute(widget);
    } else {
        // console.log('не заполнено');
        event.preventDefault();
    }

}, true);