dom_lib.js

function loadElementsSecure(query,root,timeout){
  if(timeout===undefined){
  	timeout=10000;
  }
  if(root===undefined){
	  root=document;
  }
	var t0=Date.now();
	return new Promise(function(resolve,reject){
		function _loadElements(){
			var t1=Date.now();
			if((t1-t0)<timeout){
				var elements=document.querySelectorAll(query);
				if(elements.length>0){
					resolve(Array.from(elements));
				}else{
					window.requestAnimationFrame(_loadElements);
				}
			}else{
				reject('timeout');
			}
			
		}
		window.requestAnimationFrame(_loadElements);
	});
}

function loadElementSecure(...args){
	return loadElementsSecure(...args).then(e=>e[0])
}

function loadScript(script,...args){
	if (document.readyState === 'complete' || document.readyState === 'interactive') {
		script(...args);
	}else{
		document.addEventListener('DOMContentLoaded',script.bind(this,...args));
	}
}

function getParentWithSelector(element,parentSelector){
	while((element=element.parentElement)!==null){
		if(element.matches(parentSelector)){
			return element;
		}
	}
}