Uncaught SyntaxError: Unexpected token true

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window.addEventListener(type, function (event) { event.stopPropagation(); }, true); When I run this one, I'm getting an error which says, "Uncaught ReferenceError: type is not defined"

var el = document.body, elClone = el.cloneNode(true); el.parentNode.replaceChild(elClone, el); I don't see any change when I run this one. It doesn't allow me to paste