zone.js:25 未捕获的错误：区域已加载

Question

我的 Angular 应用程序在单击按钮时加载。当第二次点击按钮时，它给我Zone already loaded 错误，因为 zone.js 内容是在第一次加载 angular2 时加载的。

我将如何检查该区域是否已加载，然后可以阻止尝试加载它（如果可用）？

当我删除delete window['zone'] 的区域（在下面回答）并尝试重新加载它时，它显示zone.js:984 Uncaught ReferenceError: Zone is not defined

Answer 1

你可以试试这样的……

$(function (){
		function removejscssfile(filename, filetype){
		   var targetelement=(filetype=="js")? "script" : (filetype=="css")? "link" : "none" //determine element type to create nodelist from
		   var targetattr=(filetype=="js")? "src" : (filetype=="css")? "href" : "none" //determine corresponding attribute to test for
		   var allsuspects=document.getElementsByTagName(targetelement)
		   for (var i=allsuspects.length; i>=0; i--){ //search backwards within nodelist for matching elements to remove
		   if (allsuspects[i] && allsuspects[i].getAttribute(targetattr)!=null && allsuspects[i].getAttribute(targetattr).indexOf(filename)!=-1)
		       allsuspects[i].parentNode.removeChild(allsuspects[i]) //remove element by calling parentNode.removeChild()
		   }
		}
	var jsCustomerTag = $("head").children("#jsShimTag");
    if (jsCustomerTag.length == 0) {
    	jsCustomerTag = document.createElement('script');
    	jsCustomerTag.setAttribute("type", "text/javascript");
    	jsCustomerTag.setAttribute("src", " <your js file> ");
    	jsCustomerTag.id = "jsShimTag";
        document.getElementsByTagName("head")[0].appendChild(jsCustomerTag);
    }

   jsCustomerTag = null;
});