常见错误检查

function errorCheck() {
        window.addEventListener('error',function(error){
                if(error.filename){return false;}else{
                    console.log(error.target+"资源加载失败"+":");
                    console.log(error.target);}
            },true);
        window.onerror = function(message, source, lineno, colno, error) {
                console.log("程序终止:"+message+" at "+lineno+":"+colno);
                return true;
            }
        window.addEventListener('unhandledrejection',function(event){
            event && event.preventDefault();
            console.log("数据接口请求失败");
        },true);       
    }