Good programmers web front-end tutorial Share Date object, what is a Date object built-in objects Date:
The type of use from UTC (Coordinated Universal Time, Coordinated Universal Time) the number of milliseconds January 1970 midnight on the 1st (zero) elapsed to save the date. Save the Date type date accurate to 285616 years before January 1, 1970 or after.
Date Object how to use it?
First you have to get a Date object
To obtain micro - channel;
var d=new Date( );
When the object creation date, do not pass any parameters returned by default the current time;
var d=new Date( '2015/12/2');
In the case of the incoming parameters, obtained is passed in time;
Note: This parameter is a string.
Some methods:
1.d.getFullYear () Gets the current year. || d.setFullYear (2012) returns January 1, 1970 to set time milliseconds;
2.d.getMonth () Gets the current month (Note: a small BUG, the current month starting from 0) || d.setMonth (9) returns January 1, 1970 to the current year set the month the number of milliseconds ;
3.d.getDate () Gets the current date || d.setDate () above;
4. getHours () acquires the
getMinutes () Gets minute
the getSeconds () Gets seconds
Different acquisition time of each machine, because the method is the time to return the machine; not time international standards;
The modification date;
Date.parse ( "2015-08-24"); 1970 milliseconds to acquire the set time;
d.getTime (); 1970 milliseconds to acquire the current time;
d.setTime()
new Date(time)
Creating a date object, and specify the time you can specify the number of milliseconds
Or modify time attribute, var d = new Date (); d.setTime (56521211021);
Case:
1. The date format
<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
</body>
<script>
function geshihua () {
var d = new Date();
var year = d.getFullYear();
var Month = d.getMonth() + 1;
var day = d.getDate();
var str = 'current time is:' + year + 'of' + Month + 'dated' + day + 'Day'
document.write(str);
}
geshihua ()
</script>
</html>
Gets the number of days of a month:
<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<title>Document</title>
<script>
function days(year, month) {
var str = year + '/' + month + '/ 1';
var d = new Date(str);
var Month = d.getMonth();
var MonthMin = d.setMonth(Month);
var MonthMin2 = d.setMonth(Month + 1);
was MONTHDAY = MonthMin2 - MonthMin
alert(MonthDay / 24 / 60 / 60 / 1000)
}
days('2014', '2')
</script>
</head>
<body>
</body>
</html>
Calculate the date difference
<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
.btn {
background:none;
border: 1px solid #b6b6b6;
display: block;
height: 40px;
margin: 40px auto;
}
</style>
</head>
<body>
<div id="div1">
<Input type = "text" placeholder = 'Start Year'>
<Input type = "text" placeholder = 'start month'>
<Input type = "text" placeholder = 'Start Date'> ||
<Input type = "text" placeholder = 'termination year'>
<Input type = "text" placeholder = 'termination month'>
<Input type = "text" placeholder = 'termination date'>
</div>
<Input type = "button" value = 'date calculated gap' onclick = 'jisuanriqi ()'>
</body>
<script>
function jisuanriqi () {
attire var = document.getElementById ( 'div1');
var aInput = oDiv.getElementsByTagName('input');
was qishiArr = [];
var zhongzhiArr = [];
for (var i = 0; i < aInput.length; i++) {
if (i < 3) {
qishiArr[i] = aInput[i].value;
} else {
zhongzhiArr[i] = aInput[i].value;
}
}
var str1 = qishiArr.join('/');
var str2 = zhongzhiArr.join('/');
var d1 = new Date(str1);
var d2 = new Date(str2);
alert(d1 + ":" + d2)
var days = Math.abs(d1.getTime() - d2.getTime()) / 1000 / 24 / 60 / 60;
alert(days)
}
</script>
</html>