tester33,
не копируйте тему целиком.
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<title>Document</title>
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addEventListener('load', function() {
document.querySelectorAll('*').forEach(el=>{
while(el = el.nextSibling){
if(el.nodeType === 8 && /^delete/.test(el.textContent.trim())) {
var fragment = document.createRange().createContextualFragment(el.textContent.trim().replace(/^delete/, ''));
el.parentNode.replaceChild(fragment, el);
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<p>Comment 0</p>
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<p>Comment 1</p>
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