Javascript 从纪元计算毫秒
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Calculating milliseconds from epoch
提问by deruse
Given that I have: mm, dd, yy, hh:mm, am/pm, what is the recommended/easiest way to convert that data into milliseconds from epoch?
鉴于我有：mm、dd、yy、hh:mm、am/pm，将数据转换为纪元毫秒的推荐/最简单方法是什么？
回答by Chris
Everytime I get an upvote on this answer, I'm reminded that my answer doesn't actually answerthe question.
每次我对这个答案点赞时，都会提醒我我的答案实际上并没有回答这个问题。
OP: If you can parse your string into the following format, you can use one of the other answers. MM/DD/YYYY HH:MM:SS AM EDT(It's important to specify the timezone; epoch is based on the meridian)
OP：如果您可以将字符串解析为以下格式，则可以使用其他答案之一。MM/DD/YYYY HH:MM:SS AM EDT（指定时区很重要；纪元基于子午线）
let milliseconds = new Date("1/20/1982 5:00 PM EST").getTime()
console.log(milliseconds);Original Answer that some people have found useful:Another technique (which most browsers support, as well as NodeJS) that doesn't require having to instantiate a Dateobject
有些人发现有用的原始答案：另一种不需要实例化Date对象的技术（大多数浏览器都支持，以及 NodeJS）
var nowEpoch = Date.now();
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date
回答by SLaks
new Date("some string").getTime()
回答by alex
回答by Joseph Dailey
var date;
if(pm)
date = new Date(yy, mm, dd, hh+12, mm, 0, 0);
else
date = new Date(yy, mm, dd, hh, mm, 0, 0);
var millis = date.getTime();
var seconds = millis/1000;
回答by Murthii Ch
var myDate = new Date(Timestamp); // Your timezone! either timestamp ot date var myEpoch = myDate.getTime()/1000.0;
var myDate = 新日期（时间戳）；// 你的时区！时间戳或日期 var myEpoch = myDate.getTime()/1000.0;
