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get all classes from html file

var lst=[];
document.querySelectorAll("[class]").forEach( (e)=>{  
e.getAttribute("class").split(" ").forEach( (cls)=>{if( cls.length>0 && lst.indexOf(cls)<0) lst.push(cls);}
);
 });
console.log(lst.sort());
Comment

get all classes in a html file

var lst=[];
document.querySelectorAll("[class]").forEach( (e)=>{  
e.getAttribute("class").split(" ").forEach( (cls)=>{if( cls.length>0 && lst.indexOf(cls)<0) lst.push(cls);}
);
 });
console.log(lst.sort());
Comment

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