blocks|key|220177|text|getDay()返回星期几。但是，您可以使用getDate()方法。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|220178|https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/Date/getDay|220179|entityMap|0|LINK|mutability|MUTABLE|url^0|0|8|M|9|0|0|2G|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|T|8|@]|D|@$9|U|A|V|1|W]]|E|$]]|$1|H|3|-4|5|6|7|X|8|@]|D|@]|E|$]]]|I|$J|$5|K|L|M|E|$N|G]]]]

<code>getDay()</code> returns the day of the week. You can however use the <code>getDate()</code> method.

<a href="https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/Date/getDay" rel="noreferrer">https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/Date/getDay</a>

blocks|key|220203|text|getDay()将为您提供星期几。您正在寻找getDate()。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|220204|entityMap^0|0|8|M|9|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|M|8|@]|D|@]|E|$]]]|G|$]]

<code>getDay()</code> will give you the day of the week. You are looking for <code>getDate()</code>.

blocks|key|220214|text|function+formatDate(date,+callback)
{
var+weekday+=+new+Array("Sunday",+"Monday",+"Tuesday",+"Wednesday",+++++"Thursday",+"Friday",+"Saturday");
var+day+=+weekday[date.getDay()];
console.log('day',day);
var+d+=+date.getDate();
var+hours+=+date.getHours();
ampmSwitch+=+(hours+>+12)+?+"PM"+:+"AM";
if+(hours+>+12)+{
++++hours+-=+12;

}
else+if+(hours+===+0)+{
++++hours+=+12;
}
var+m+=+date.getMinutes();
var+months+=+["January",+"February",+"March",+"April",+"May",+"June",+"July",+"August",+"September",+"October",+"November",+"December"];
var+month+=+months[date.getMonth()];
var+year+=+date.getFullYear();
newdate+=+day+%2B+',+'+%2B+month+%2B+'+'+%2B+d+%2B+','+%2B+year+%2B+'+at+'+%2B+hours+%2B+":"+%2B+m+%2B+"+"+%2B+ampmSwitch
callback(newdate)
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|220215|并使用此代码调用|unstyled|220216|date="Fri+Aug+26+2016+18:06:01+GMT%2B0530+(India+Standard+Time)"
formatDate(date,function(result){
+++console.log('Date=',result);
+});|220217|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|L|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|I|3|-4|5|F|7|N|8|@]|9|@]|A|$]]]|J|$]]

<pre><code>function formatDate(date, callback)
{
var weekday = new Array("Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday");
var day = weekday[date.getDay()];
console.log('day',day);
var d = date.getDate();
var hours = date.getHours();
ampmSwitch = (hours &gt; 12) ? "PM" : "AM";
if (hours &gt; 12) {
 hours -= 12;

}
else if (hours === 0) {
 hours = 12;
}
var m = date.getMinutes();
var months = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"];
var month = months[date.getMonth()];
var year = date.getFullYear();
newdate = day + ', ' + month + ' ' + d + ',' + year + ' at ' + hours + ":" + m + " " + ampmSwitch
callback(newdate)
}
</code></pre>

and call with this code 

<pre><code>date="Fri Aug 26 2016 18:06:01 GMT+0530 (India Standard Time)"
formatDate(date,function(result){
 console.log('Date=',result);
 });
</code></pre>

blocks|key|220267|text|从现在开始，您可能希望对Date对象使用以下函数：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|220268|​|220269|++++function+dayOf(date)
++++{
++++++++return+date.getDate();
++++}

++++function+monthOf(date)
++++{
++++++++return+date.getMonth()+%2B+1;
++++}

++++function+yearOf(date)
++++{
++++++++return+date.getYear()+%2B+1900;
++++}

++++function+weekDayOf(date)
++++{
++++++++return+date.getDay()+%2B+1;
++++}
++++
++++var+date+=+new+Date("5/15/2020");
++++console.log("Day:+"+%2B+dayOf(date));
++++console.log("Month:+"+%2B+monthOf(date));
++++console.log("Year:+"+%2B+yearOf(date));|code-block|syntax|javascript|220270|220271|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|N|8|@]|9|@]|A|$G|H]]|$1|I|3|C|5|6|7|O|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|P|8|@]|9|@]|A|$]]]|K|$]]

From now on you probably want to use the following below functions for Date objects: 

<div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-js lang-js prettyprint-override"><code> function dayOf(date)
 {
 return date.getDate();
 }

 function monthOf(date)
 {
 return date.getMonth() + 1;
 }

 function yearOf(date)
 {
 return date.getYear() + 1900;
 }

 function weekDayOf(date)
 {
 return date.getDay() + 1;
 }
 
 var date = new Date("5/15/2020");
 console.log("Day: " + dayOf(date));
 console.log("Month: " + monthOf(date));
 console.log("Year: " + yearOf(date));</code></pre>
</div>
</div>

blocks|key|220331|text|当您使用函数.getDay()时，此函数将考虑月份数字从0开始而不是从1开始，然后如果您使用日期新日期(2021-11-04)，.getDay()函数将考虑12月4日而不是11月...|type|unstyled|depth|inlineStyleRanges|entityRanges|data|220332|然后，要获得11月的第4天，您需要将"2021-10-04“传递给Date()类。|220333|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

When you use the function .getDay(), this one consider the month's number start in 0 and not in 1, then if you use the date new Date(2021-11-04), the .getDay() function will consider the day 4 of dezember and not november...
Then, to get de day 4 of november, you need pass &quot;2021-10-04&quot; to the Date() class.

Hi I'm new in javascript
I have such javascript code

<pre><code>alert(DATE.value);
var d = new Date(DATE.value);
var year = d.getFullYear();
var month = d.getMonth();
var day = d.getDay();
alert(month);
alert(day);
if(2012 &lt; year &lt; 1971 | 1 &gt; month+1 &gt; 12 | 0 &gt;day &gt; 31){
 alert(errorDate);
 DATE.focus();
 return false;
}
</code></pre>

take for instance: <code>DATE.value = "11/11/1991"</code>

when I call <code>alert(day);</code> it shows me <code>3</code>; 
when I call <code>alert(d);</code> it is returns me correct info.

Date.getDay() javascript returns wrong day

嗨，我是javascript新手，我有这样的javascript代码alert(DATE.value);var d = new Date(DATE.value);var year = d.getFullYear();var month = d.getMonth();var day = d.getDay();alert(...

问Date.getDay() javascript返回错误的日期
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