如何计算白屏时间和首屏时间

Issue 欢迎在 Gtihub Issue 中回答此问题: Issue 469

Author 回答者: hhhpw

白屏时间: window.performance.timing.domLoading - window.performance.timing.navigationStart

首屏时间: window.performance.timing.domInteractive - window.performace.timing.navigationStart

Author 回答者: wuyuehui

首屏时间: window.performance.timing.domInteractive - window.performace.timing.navigationStart

window.performace.timing.navigationStart

performace -> performance少了个n