我怎样才能在Javascript中获得自纪元以来的秒数？ [英] How can I get seconds since epoch in Javascript?

问题描述

在Unix上，我可以运行 date'+％s'来获取自纪元以来的秒数。但我需要在浏览器前端查询，而不是后端。

On Unix, I can run date '+%s' to get the amount of seconds since epoch. But I need to query that in a browser front-end, not back-end.

有没有办法在JavaScript中查找自Epoch以来的秒数？

Is there a way to find out seconds since Epoch in JavaScript?

推荐答案

var seconds = new Date() / 1000;

或者，对于一个不那么黑的版本：

Or, for a less hacky version:

var d = new Date();
var seconds = d.getTime() / 1000;

别忘了 Math.floor（）或 Math.round（）要舍入到最接近的整数，否则你可能得到一个你不想要的奇数小数：

Don't forget to Math.floor() or Math.round() to round to nearest whole number or you might get a very odd decimal that you don't want:

var d = new Date();
var seconds = Math.round(d.getTime() / 1000);

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