[Vuejs]-DOMException: Document.querySelectorAll: 'body*:not(script):not(style):not(title)' is not a valid selector

since you are getting css selector syntax error add space after body:

document.querySelectorAll("body *:not(script):not(style):not(title)");

or small:

document.querySelectorAll("body *:not(script,style,title)");