_.now()
获取自 Unix 纪元 (1 January 1970 00:00:00 UTC) 以来经过的毫秒数的时间戳。
引入版本 2.4.0
返回 (number): 返回时间戳。
示例
js
_.defer((stamp) => {
console.log(_.now() - stamp)
}, _.now())
// => Logs the number of milliseconds it took for the deferred invocation.