Cookie Notice – Console error when returning empty string

Dear technical support,

I am doing some tests on my website in order to show/hide the Cookie Notice banner on specific pages. At present I have this piece of code inside my function.php file that should hide the Cookie Notice banner everywhere:

function custom_cn_cookie_notice_output($output) {
	if (true) {
		$output = '';
	}
	return $output;
}

add_filter('cn_cookie_notice_output', 'custom_cn_cookie_notice_output');

It correctly blocks the visualization of the Cookie Notice banner everywhere BUT…it also returns this in my Google Chrome console:

front.min.js:1 Uncaught TypeError: Cannot read property ‘classList’ of null
at Object.init (front.min.js:1)
at front.min.js:1

This is the front.min.js file:

!function(){function e(e,t){t=t||{bubbles:!1,cancelable:!1,detail:void 0};var n=document.createEvent("CustomEvent");return n.initCustomEvent(e,t.bubbles,t.cancelable,t.detail),n}"function"!=typeof window.CustomEvent&&(e.prototype=window.Event.prototype,window.CustomEvent=e)}(),function(){function t(e){return new RegExp("(^| )"+e+"( |$)")}function e(e,t,n){for(var i=0;i<e.length;i++)t.call(n,e[i])}function n(e){this.element=e}n.prototype={add:function(){e(arguments,function(e){this.contains(e)||(this.element.className+=0<this.element.className.length?" "+e:e)},this)},remove:function(){e(arguments,function(e){this.element.className=this.element.className.replace(t(e),"")},this)},toggle:function(e){return this.contains(e)?(this.remove(e),!1):(this.add(e),!0)},contains:function(e){return t(e).test(this.element.className)},replace:function(e,t){this.remove(e),this.add(t)}},"classList"in Element.prototype||Object.defineProperty(Element.prototype,"classList",{get:function(){return new n(this)}}),window.DOMTokenList&&null==DOMTokenList.prototype.replace&&(DOMTokenList.prototype.replace=n.prototype.replace)}(),function(a,r){var e=new function(){this.cookiesAccepted=null,this.noticeContainer=null,this.setStatus=function(e){var t=this;"1"===cnArgs.onScroll&&a.removeEventListener("scroll",this.handleScroll);var n=new Date,i=new Date;"accept"===e?(e="true",i.setTime(parseInt(n.getTime())+1e3*parseInt(cnArgs.cookieTime))):(e="false",i.setTime(parseInt(n.getTime())+1e3*parseInt(cnArgs.cookieTimeRejected))),r.cookie=cnArgs.cookieName+"="+e+";expires="+i.toUTCString()+";"+(cnArgs.cookieDomain?"domain="+cnArgs.cookieDomain+";":"")+(cnArgs.cookiePath?"path="+cnArgs.cookiePath+";":"")+("1"===cnArgs.secure?"secure;":""),this.cookiesAccepted="true"===e;var o=new CustomEvent("setCookieNotice",{detail:{value:e,time:n,expires:i,data:cnArgs}});if(r.dispatchEvent(o),this.setBodyClass(["cookies-set","true"===e?"cookies-accepted":"cookies-refused"]),this.hideCookieNotice(),"automatic"===cnArgs.revokeCookiesOpt&&(this.noticeContainer.addEventListener("animationend",function e(){t.noticeContainer.removeEventListener("animationend",e),t.showRevokeNotice()}),this.noticeContainer.addEventListener("webkitAnimationEnd",function e(){t.noticeContainer.removeEventListener("webkitAnimationEnd",e),t.showRevokeNotice()})),"1"===cnArgs.redirection&&("true"===e&&null===this.cookiesAccepted||e!==this.cookiesAccepted&&null!==this.cookiesAccepted)){var s=a.location.protocol+"//",c=a.location.host+"/"+a.location.pathname;"1"===cnArgs.cache?(s=s+c.replace("//","/")+(""===a.location.search?"?":a.location.search+"&")+"cn-reloaded=1"+a.location.hash,a.location.href=s):(s=s+c.replace("//","/")+a.location.search+a.location.hash,a.location.reload(!0))}else;},this.getStatus=function(e){var t=("; "+r.cookie).split("; cookie_notice_accepted=");if(2!==t.length)return null;var n=t.pop().split(";").shift();return e?"true"===n:n},this.showCookieNotice=function(){var t=this,e=new CustomEvent("showCookieNotice",{detail:{data:cnArgs}});r.dispatchEvent(e),this.noticeContainer.classList.remove("cookie-notice-hidden"),this.noticeContainer.classList.add("cn-animated"),this.noticeContainer.classList.add("cookie-notice-visible"),this.noticeContainer.addEventListener("animationend",function e(){t.noticeContainer.removeEventListener("animationend",e),t.noticeContainer.classList.remove("cn-animated")}),this.noticeContainer.addEventListener("webkitAnimationEnd",function e(){t.noticeContainer.removeEventListener("webkitAnimationEnd",e),t.noticeContainer.classList.remove("cn-animated")})},this.hideCookieNotice=function(){var t=this,e=new CustomEvent("hideCookieNotice",{detail:{data:cnArgs}});r.dispatchEvent(e),this.noticeContainer.classList.add("cn-animated"),this.noticeContainer.classList.remove("cookie-notice-visible"),this.noticeContainer.addEventListener("animationend",function e(){t.noticeContainer.removeEventListener("animationend",e),t.noticeContainer.classList.remove("cn-animated"),t.noticeContainer.classList.add("cookie-notice-hidden")}),this.noticeContainer.addEventListener("webkitAnimationEnd",function e(){t.noticeContainer.removeEventListener("webkitAnimationEnd",e),t.noticeContainer.classList.remove("cn-animated"),t.noticeContainer.classList.add("cookie-notice-hidden")})},this.showRevokeNotice=function(){var t=this,e=new CustomEvent("showRevokeNotice",{detail:{data:cnArgs}});r.dispatchEvent(e),this.noticeContainer.classList.remove("cookie-revoke-hidden"),this.noticeContainer.classList.add("cn-animated"),this.noticeContainer.classList.add("cookie-revoke-visible"),this.noticeContainer.addEventListener("animationend",function e(){t.noticeContainer.removeEventListener("animationend",e),t.noticeContainer.classList.remove("cn-animated")}),this.noticeContainer.addEventListener("webkitAnimationEnd",function e(){t.noticeContainer.removeEventListener("webkitAnimationEnd",e),t.noticeContainer.classList.remove("cn-animated")})},this.hideRevokeNotice=function(){var t=this,e=new CustomEvent("hideRevokeNotice",{detail:{data:cnArgs}});r.dispatchEvent(e),this.noticeContainer.classList.add("cn-animated"),this.noticeContainer.classList.remove("cookie-revoke-visible"),this.noticeContainer.addEventListener("animationend",function e(){t.noticeContainer.removeEventListener("animationend",e),t.noticeContainer.classList.remove("cn-animated"),t.noticeContainer.classList.add("cookie-revoke-hidden")}),this.noticeContainer.addEventListener("webkitAnimationEnd",function e(){t.noticeContainer.removeEventListener("webkitAnimationEnd",e),t.noticeContainer.classList.remove("cn-animated"),t.noticeContainer.classList.add("cookie-revoke-hidden")})},this.setBodyClass=function(e){r.body.classList.remove("cookies-revoke"),r.body.classList.remove("cookies-accepted"),r.body.classList.remove("cookies-refused"),r.body.classList.remove("cookies-set"),r.body.classList.remove("cookies-not-set");for(var t=0;t<e.length;t++)r.body.classList.add(e[t])},this.handleScroll=function(){(a.pageYOffset||(r.documentElement||r.body.parentNode||r.body).scrollTop)>parseInt(cnArgs.onScrollOffset)&&this.setStatus("accept")},this.adjustOffset=function(){var e=r.getElementById("coronabar"),t=r.getElementById("wpadminbar"),n=0,i=0;"top"===cnArgs.position&&null!==t&&(i=t.offsetHeight,this.noticeContainer.style.top=i+"px"),null!==e&&(n=e.offsetHeight-1,"top"===cnArgs.position?(e.style.top=i+"px",this.noticeContainer.style.top=n+i+"px"):this.noticeContainer.style.bottom=n+"px")},this.getClosest=function(e,t){for(Element.prototype.matches||(Element.prototype.matches=Element.prototype.matchesSelector||Element.prototype.mozMatchesSelector||Element.prototype.msMatchesSelector||Element.prototype.oMatchesSelector||Element.prototype.webkitMatchesSelector||function(e){for(var t=(this.document||this.ownerDocument).querySelectorAll(e),n=t.length;0<=--n&&t.item(n)!==this;);return-1<n});e&&e!==r;e=e.parentNode)if(e.matches(t))return e;return null},this.init=function(){var t=this;this.cookiesAccepted=this.getStatus(!0),this.noticeContainer=r.getElementById("cookie-notice");var e=r.getElementsByClassName("cn-set-cookie"),n=r.getElementsByClassName("cn-revoke-cookie"),i=r.getElementById("cn-close-notice");this.noticeContainer.classList.add("cn-effect-"+cnArgs.hideEffect),t.adjustOffset(),a.addEventListener("resize",function(e){t.adjustOffset()}),"1"===cnArgs.coronabarActive&&(r.addEventListener("display.coronabar",function(e){t.adjustOffset()}),r.addEventListener("hide.coronabar",function(e){t.adjustOffset()}),r.addEventListener("saveData.coronabar",function(e){var t=e.detail;if(null!==t){var n=new XMLHttpRequest;n.open("POST",cnArgs.ajaxUrl,!0),n.setRequestHeader("Content-Type","application/x-www-form-urlencoded;"),n.onload=function(){200<=this.status&&this.status},n.onerror=function(){},n.send("action=cn_save_cases&nonce="+cnArgs.nonce+"&data="+JSON.stringify(t))}})),null===this.cookiesAccepted?("1"===cnArgs.onScroll&&a.addEventListener("scroll",function(e){t.handleScroll()}),"1"===cnArgs.onClick&&a.addEventListener("click",function(e){null===t.getClosest(e.target,"#cookie-notice")&&t.setStatus("accept")},!0),this.setBodyClass(["cookies-not-set"]),this.showCookieNotice()):(this.setBodyClass(["cookies-set",!0===this.cookiesAccepted?"cookies-accepted":"cookies-refused"]),"1"===cnArgs.revokeCookies&&"automatic"===cnArgs.revokeCookiesOpt&&this.showRevokeNotice());for(var o=0;o<e.length;o++)e[o].addEventListener("click",function(e){e.preventDefault(),e.stopPropagation(),t.setStatus(this.dataset.cookieSet)});"null"!==i&&i.addEventListener("click",function(e){e.preventDefault(),e.stopPropagation(),t.setStatus(this.dataset.cookieSet)});for(o=0;o<n.length;o++)n[o].addEventListener("click",function(e){e.preventDefault(),t.noticeContainer.classList.contains("cookie-revoke-visible")?(t.hideRevokeNotice(),t.noticeContainer.addEventListener("animationend",function e(){t.noticeContainer.removeEventListener("animationend",e),t.showCookieNotice()}),t.noticeContainer.addEventListener("webkitAnimationEnd",function e(){t.noticeContainer.removeEventListener("webkitAnimationEnd",e),t.showCookieNotice()})):t.noticeContainer.classList.contains("cookie-notice-hidden")&&t.noticeContainer.classList.contains("cookie-revoke-hidden")&&t.showCookieNotice()})}};a.addEventListener("load",function(){e.init()},!1)}(window,document);

How can I solve

Thanks in advance guys,
Francesco

• This topic was modified 4 years, 10 months ago by Dedalab.