serializeElementToSelector.js

function serializeElementToSelector(element){
    if(!element.dataset.hasOwnProperty('__serial_token__'))
    element.dataset.__serial_token__=''+((Math.random()*1e9)<<0)+((Math.random()*1e9)<<0)+Date.now();    
    var tagName=element.tagName.toLowerCase();
	var selector=tagName;
    if(element.id!==''){
		selector+='#'+element.id;
	}
	for(let cls of element.classList){
		selector+='.'+CSS.escape(cls)
	}
    for(let attr of element.attributes){
		if(attr.name!=="class"&&attr.name!=="id"){
			var selector_='['+CSS.escape(attr.name)+'="'+CSS.escape(attr.value)+'"]';
			try{
				console.log(tagName+selector_)
				document.querySelector(tagName+selector_);
				selector+=selector_
			}catch(err){}
		}
	}	
    return selector;
}