問(wèn)題描述

文檔上寫的好玄乎:

https://w3c.github.io/resourc...

The startTime attribute must return a DOMHighResTimeStamp [HR-TIME-2] with the time immediately before the user agent starts to queue the resource for fetching. If there are HTTP redirects or equivalent when fetching the resource, and if all the redirects or equivalent are from the same origin as the current document or the timing allow check algorithm passes, this attribute must return the same value as redirectStart. Otherwise, this attribute must return the same value as fetchStart.

這個(gè)時(shí)間具體的計(jì)算方式是什么?

問(wèn)題解答

沒(méi)用過(guò)。看文檔的意思是說(shuō)這個(gè)屬性是一個(gè)高精度的時(shí)間戳。 搜下HR-TIME-2是什么樣的看看。