用 JavaScript 计算昨天的日期
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/5511323/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Calculate the date yesterday in JavaScript
提问by Omega
How can I calculate yesterdayas a date in JavaScript?
如何在 JavaScript 中将昨天计算为日期？
回答by James Kyburz
var date = new Date();
date ; //# => Fri Apr 01 2011 11:14:50 GMT+0200 (CEST)
date.setDate(date.getDate() - 1);
date ; //# => Thu Mar 31 2011 11:14:50 GMT+0200 (CEST)
回答by KooiInc
Not very efficient, but as oneliner:
效率不高，但作为oneliner：
var yesterday = new Date(new Date().setDate(new Date().getDate()-1));
The above creates three Dateobjects which is needlessly wasteful. This can be reduced to a single instantiation with:
以上创建了三个Date不必要的浪费的对象。这可以简化为单个实例：
var yesterday = (function(){this.setDate(this.getDate()-1); return this})
.call(new Date)
Or, if you prefer:
或者，如果您更喜欢：
var yesterday = (function(d){ d.setDate(d.getDate()-1); return d})(new Date)
Or, if you prefer ES6 with arrow function:
或者，如果您更喜欢带有箭头功能的 ES6：
let yesterday = ( d => new Date(d.setDate(d.getDate()-1)) )(new Date);
回答by ashishjmeshram
Try this
尝试这个
var d = new Date();
d.setDate(d.getDate() - 1);
回答by Fabiano Soriani
Surprisingly no answer point to the easiest cross browser solution
令人惊讶的是，最简单的跨浏览器解决方案没有答案
To find exactly the same time yesterday:
要查找与昨天完全相同的时间：
var yesterday = new Date(Date.now() - 86400000); // that is: 24 * 60 * 60 * 1000
That is if you wanna go dependency free, otherwise I'd recommend using http://momentjs.com
那就是如果你想无依赖，否则我建议使用http://momentjs.com
回答by Ami Heines
To generalize the question and make other diff calculations use:
要概括问题并进行其他差异计算，请使用：
var yesterday = new Date((new Date()).valueOf() - 1000*60*60*24);
this creates a new date object based on the value of "now" as an integer which represents the unix epoch in milliseconds subtracting one day.
这将根据作为整数的“now”值创建一个新的日期对象，该整数表示以毫秒为单位减去一天的 unix 纪元。
Two days ago:
前两天：
var twoDaysAgo = new Date((new Date()).valueOf() - 1000*60*60*24*2);
An hour ago:
一小时前：
var oneHourAgo = new Date((new Date()).valueOf() - 1000*60*60);
回答by guyaloni
回答by Gopinath Radhakrishnan
new Date(new Date().setDate(new Date().getDate()-1))
回答by Billyhomebase
//Create a date object using the current time
var now = new Date();
//Subtract one day from it
now.setDate(now.getDate()-1);
回答by Deepu Reghunath
var today = new Date();
var yesterday1 = new Date(new Date().setDate(new Date().getDate() - 1));
var yesterday2 = new Date(Date.now() - 86400000);
var yesterday3 = new Date(Date.now() - 1000*60*60*24);
var yesterday4 = new Date((new Date()).valueOf() - 1000*60*60*24);
console.log("Today: "+today);
console.log("Yesterday: "+yesterday1);
console.log("Yesterday: "+yesterday2);
console.log("Yesterday: "+yesterday3);
console.log("Yesterday: "+yesterday4);回答by Evgeni Makarov
This will produce yesterday at 00:00 with minutes precision
这将在昨天 00:00 以分钟精度产生
var d = new Date();
d.setDate(d.getDate() - 1);
d.setTime(d.getTime()-d.getHours()*3600*1000-d.getMinutes()*60*1000);
