emove( "wpforms-is-turnstile-invisible" );
			};
		';

		// Captcha callback, used by hCaptcha and checkbox reCaptcha v2.
		$callback = /** @lang JavaScript */
			'var wpformsRecaptchaCallback = function (el) {
				var hdn = el.parentNode.querySelector(".wpforms-recaptcha-hidden");
				var err = el.parentNode.querySelector("#g-recaptcha-hidden-error");
				hdn.value = "1";
				wpformsDispatchEvent(hdn, "change", false);
				hdn.classList.remove("wpforms-error");
				err && hdn.parentNode.removeChild(err);
			};
		';

		$sync = /** @lang JavaScript */
			'const wpformsRecaptchaSync = ( func ) => {
				return function() {
					const context = this;
					const args = arguments;

					// Sync with jQuery ready event.
					jQuery( document ).ready( function() {
						func.apply( context, args );
					} );
				}
			};
		';

		if ( $captcha_settings['provider'] === 'hcaptcha' ) {
			$data  = $dispatch;
			$data .= $callback;

			$data .= /** @lang JavaScript */
				'var wpformsRecaptchaLoad = function () {
					Array.prototype.forEach.call(document.querySelectorAll(".g-recaptcha"), function (el) {
						var captchaID = hcaptcha.render(el, {
							callback: function () {
								wpformsRecaptchaCallback(el);
							}
						});
						el.setAttribute("data-recaptcha-id", captchaID);
					});
					wpformsDispatchEvent(document, "wpformsRecaptchaLoaded", true);
				};
			';

			return $data;
		}

		if ( $captcha_settings['provider'] === 'turnstile' ) {
			$data  = $dispatch;
			$data .= $callback;
			$data .= $turnstile_update_class;

			$data .= /** @lang JavaScript */
				'var wpformsRecaptchaLoad = function () {
					Array.prototype.forEach.call(document.querySelectorAll(".g-recaptcha"), function (el) {
						let form = el.closest( "form" ),
						formId = form.dataset.formid,
						captchaID = turnstile.render(el, {
							theme: "' . $captcha_settings['theme'] . '",
							callback: function () {
								turnstileUpdateContainer(el);
								wpformsRecaptchaCallback(el);
							},
							"timeout-callback": function() {
								turnstileUpdateContainer(el);
							}
						});
						el.setAttribute("data-recaptcha-id", captchaID);
					});

					wpformsDispatchEvent( document, "wpformsRecaptchaLoaded", true );
				};
			';

			return $data;
		}

		if ( $captcha_settings['recaptcha_type'] === 'v3' ) {
			$data = $dispatch;

			$data .= /** @lang JavaScript */
				'var wpformsRecaptchaV3Execute = function ( callback ) {
					grecaptcha.execute( "' . $captcha_settings['site_key'] . '", { action: "wpforms" } ).then( function ( token ) {
						Array.prototype.forEach.call( document.getElementsByName( "wpforms[recaptcha]" ), function ( el ) {
							el.value = token;
						} );
						if ( typeof callback === "function" ) {
							return callback();
						}
					} );
				}
				grecaptcha.ready( function () {
					wpformsDispatchEvent( document, "wpformsRecaptchaLoaded", true );
				} );
			';
		} elseif ( $captcha_settings['recaptcha_type'] === 'invisible' ) {
			$data  = $polyfills;
			$data .= $dispatch;
			$data .= $sync;

			$data .= /** @lang JavaScript */
				'var wpformsRecaptchaLoad = wpformsRecaptchaSync( function () {
					Array.prototype.forEach.call(document.querySelectorAll(".g-recaptcha"), function (el) {
						try {
							var recaptchaID = grecaptcha.render(el, {
								"callback": function () {
									wpformsRecaptchaCallback(el);
								},
								"error-callback": function () {
									wpformsRecaptchaErrorCallback(el);
								}
							}, true);
							el.closest("form").querySelector("button[type=submit]").recaptchaID = recaptchaID;
						} catch (error) {}
					});
					wpformsDispatchEvent(document, "wpformsRecaptchaLoaded", true);
				} );
				var wpformsRecaptchaCallback = function (el) {
					var $form = el.closest("form");
					if (typeof wpforms.formSubmit === "function") {
						wpforms.formSubmit($form);
					} else {
						$form.querySelector("button[type=submit]").recaptchaID = false;
						$form.submit();
					}
				};
				var wpformsRecaptchaErrorCallback = function (el) {
					var $form = el.closest("form");
					$form.querySelector("button[type=submit]").dataset.captchaInvalid = true;
				};
			';
		} else {
			$data  = $dispatch;
			$data .= $callback;

			$data .= /** @lang JavaScript */
				'var wpformsRecaptchaLoad = function () {
					Array.prototype.forEach.call(document.querySelectorAll(".g-recaptcha"), function (el) {
						try {
							var recaptchaID = grecaptcha.render(el, {
								callback: function () {
									wpformsRecaptchaCallback(el);
								}
							});
							el.setAttribute("data-recaptcha-id", recaptchaID);
						} catch (error) {}
					});
					wpformsDispatchEvent(document, "wpformsRecaptchaLoaded", true);
				};
			';
		}

		return $data;
	}

	/**
	 * Cloudflare Turnstile captcha requires defer attribute.
	 *
	 * @since 1.8.1
	 *
	 * @param string $tag    HTML for the script tag.
	 * @param string $handle Handle of script.
	 * @param string $src    Src of script.
	 *
	 * @return string
	 */
	public function set_defer_attribute( $tag, $handle, $src ) {

		$captcha_settings = wpforms_get_captcha_settings();

		if ( $captcha_settings['provider'] !== 'turnstile' ) {
			return $tag;
		}

		if ( $handle !== 'wpforms-recaptcha' ) {
			return $tag;
		}

		return str_replace( ' src', ' defer src', $tag );
	}
}