javascript - 如何克隆一个Date对象？(How to clone a Date object?)

Question

Assigning a Date variable to another one will copy the reference to the same instance.(将Date变量分配给另一个变量会将引用复制到同一实例。)

This means that changing one will change the other.(这意味着更改一个将更改另一个。) How can I actually clone or copy a Date instance?(如何实际克隆或复制Date实例？)   ask by árvízt?r? tük?rfúrógép translate from so

Answer 1

Use the Date object's getTime() method, which returns the number of milliseconds since 1 January 1970 00:00:00 ( epoch time ):(使用Date对象的getTime()方法，该方法返回自1970年1月1日00:00:00（ 纪元时间 ）以来的毫秒数：)

var date = new Date(); var copiedDate = new Date(date.getTime()); In Safari 4, you can also write:(在Safari 4中，您还可以编写：) var date = new Date(); var copiedDate = new Date(date); ...but I'm not sure whether this works in other browsers.(...但是我不确定这是否可以在其他浏览器中使用。) (It seems to work in IE8).(（它似乎在IE8中有效）。)