以DD / MM / YYYY的格式获取昨天JavaScript的日期功能 [英] Function to get yesterday's date in Javascript in format DD/MM/YYYY
问题描述
我一直在寻找一段时间,以DD / MM / YYYY的形式获得昨天的日期。
这是我现在的代码:
var $ today = new Date();
var $ dd = $ today.getDate();
var $ mm = $ today.getMonth()+ 1; //一月是0!
var $ yyyy = $ today.getFullYear(); $ $ $ $ $ $ $ $ $ $ $ $ $ $ + $ $ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + '/'+ $ yyyy;
有了这个,我今天的日期格式为DD / MM / YYYY(谢谢SO)。
但是当我尝试这个:
var $ yesterday = $ today.getDate() - 1;
根据本网站推荐的其他地方(丢失链接),我收到一条错误,说getDate( )没有找到这个对象。
我正在使用我的脚本与Sahi,但我不认为它是链接,因为Sahi没有问题的Javascript。 / p>
提前谢谢。
这里的问题似乎是您通过为其分配一个字符串来重新分配 $ today
:
$ today = $ dd +'/'+ $ mm +'/'+ $ yyyy;
字符串没有 getDate
。 / p>
另外, $ today.getDate() - 1
只是给你一个月的日子减去一个;它不会给你昨天的完整日期。尝试这样:
$ today = new Date();
$ yesterday = new Date($ today);
$ yesterday.setDate($ today.getDate() - 1); // setDate还支持负值,这会导致月滚动。
然后只需应用您写的格式代码:
var $ dd = $ yesterday.getDate();
var $ mm = $ yesterday.getMonth()+ 1; //一月是0!
var $ yyyy = $ yesterday.getFullYear(); $ $ $ $ $ $ $ $ + $ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + '/'+ $ yyyy;
由于最后一个语句, $ yesterday
现在是包含格式化日期的 String
(不 a Date
)。
I've been looking for a while to get yesterday's date in format DD/MM/YYYY. Here's my current code:
var $today = new Date();
var $dd = $today.getDate();
var $mm = $today.getMonth()+1; //January is 0!
var $yyyy = $today.getFullYear();
if($dd<10){$dd='0'+dd} if($mm<10){$mm='0'+$mm} $today = $dd+'/'+$mm+'/'+$yyyy;
With this, I get today's date in format DD/MM/YYYY (thanks SO). But when I try this:
var $yesterday = $today.getDate()-1;
as recommended on this site somewhere else (lost the link), I get an error saying that getDate() was not found for this object.
I'm using my script with Sahi, but I don't think it's linked, as Sahi has no trouble with Javascript.
Thank you in advance.
The problem here seems to be that you're reassigning $today
by assigning a string to it:
$today = $dd+'/'+$mm+'/'+$yyyy;
Strings don't have getDate
.
Also, $today.getDate()-1
just gives you the day of the month minus one; it doesn't give you the full date of 'yesterday'. Try this:
$today = new Date();
$yesterday = new Date($today);
$yesterday.setDate($today.getDate() - 1); //setDate also supports negative values, which cause the month to rollover.
Then just apply the formatting code you wrote:
var $dd = $yesterday.getDate();
var $mm = $yesterday.getMonth()+1; //January is 0!
var $yyyy = $yesterday.getFullYear();
if($dd<10){$dd='0'+dd} if($mm<10){$mm='0'+$mm} $yesterday = $dd+'/'+$mm+'/'+$yyyy;
Because of the last statement, $yesterday
is now a String
(not a Date
) containing the formatted date.
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