JavaScript -Element nach Klasse ausblenden
document.getElementsByClassName('class_name')[0].style.visibility='hidden';
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document.getElementsByClassName('class_name')[0].style.visibility='hidden';
docuement.querySelector('.class_name').style.visibility = 'hidden';
document.getElementsByClassName('className')[0].style.visibility='hidden';
for (let el of document.querySelectorAll('.appBanner')) el.style.visibility = 'hidden';