判斷多個動態添加的js文件是否加載完成

let script1 = document.createElement('script');
	    script1.type = 'text/javascript';
	    script1.src = 'js/md5.js';
	    document.getElementsByTagName("head")[0].appendChild(script1);
	  
	   let script2 = document.createElement('script');
	    script2.type = 'text/javascript';
	    script2.src = 'js/url.js';
	  document.getElementsByTagName("head")[0].appendChild(script2);
	  
		var activeJs = [script1,script2]
		
		for(let i=0; i<activeJs.length; i++) {
			
			(function(i){
				activeJs[i].onload = activeJs[i].onreadystatechange = function(){
					if(!this.readyState || this.readyState=='loaded' || this.readyState=='complete'){
					　　		
					 	  console.log('加載好了'+ activeJs[i])
					}
				};
			})(i)
		
		}