Question

 var navigationStartTime                = window.performance.timing.navigationStart;

        function domTimingRecordEvents(){
            var domEventObject = {};
            var domArray = [];

            domEventObject.domLoadingStartTime            = (window.performance.timing.domLoading - navigationStartTime)/1000;
            domEventObject.domInteractiveTime             = (window.performance.timing.domInteractive - navigationStartTime)/1000;
            domEventObject.domContentLoadedEventStartTime = (window.performance.timing.domContentLoadedEventStart - navigationStartTime)/1000;
            domEventObject.domContentLoadedEventEndTime   = (window.performance.timing.domContentLoadedEventEnd - navigationStartTime)/1000;
            domEventObject.domCompleteTime                = (window.performance.timing.domComplete - navigationStartTime)/1000;
            domEventObject.loadEventStartTime             = (window.performance.timing.loadEventStart - navigationStartTime)/1000;
            //var loadEventEndTime               = (window.performance.timing.loadEventEnd - navigationStartTime)/1000;
            
            domArray.push(domEventObject);
            console.table(domArray);          
        }   

domTimingRecordEvents();

我上面的代码在chrome和firefox中顺利运行，但在Opera浏览器中运行时会出错。
我在opera窗口返回窗口中检查了控制台，但window.performance返回undefined
在上面的代码中，我在javascript中计算各种页面事件后，在几秒钟内得到时间。
我应该使用： -

 var isOpera = (!!window.opr && !!opr.addons) || !!window.opera || navigator.userAgent.indexOf(' OPR/') >= 0;

并跳过上面的代码或有其他方法吗？

Answer 1

Windows性能它是JavaScript中的新功能，并且所有浏览器都不支持所有功能。

请查看Mozilla的此文档，了解为每个浏览器实现的功能

https://developer.mozilla.org/en-US/docs/Web/API/Performance

窗口性能不起作用

1 个答案: