JavaScript中Date对象的常用方法示例

2024-05-06 16:24:50

字体：大中小

来源：转载

供稿：网友

这篇文章主要介绍了JavaScript中Date对象的常用方法示例,Date对象的相关运用是JS入门学习中的基础知识,需要的朋友可以参考下

getFullYear()

使用 getFullYear() 获取年份。

源代码:

</script>

<!DOCTYPE html>

<html>

<body>

<p id="demo">Click the button to display the full year of todays date.</p>

<button onclick="myFunction()">Try it</button>

<script>

function myFunction()

{

var d = new Date();

var x = document.getElementById("demo");

x.innerHTML=d.getFullYear();

}

</script>

</body>

</html>

测试结果:

2015

getTime()

getTime() 返回从 1970 年 1 月 1 日至今的毫秒数。

源代码:

<!DOCTYPE html>

<html>

<body>

<p id="demo">Click the button to display the number of milliseconds since midnight, January 1, 1970.</p>

<button onclick="myFunction()">Try it</button>

<script>

function myFunction()

{

var d = new Date();

var x = document.getElementById("demo");

x.innerHTML=d.getTime();

}

</script>

</body>

</html>

测试结果:

1445669203860

setFullYear()

如何使用 setFullYear() 设置具体的日期。

源代码:

<!DOCTYPE html>

<html>

<body>

<p id="demo">Click the button to display a date after changing the year, month, and day.</p>

<button onclick="myFunction()">Try it</button>

<script>

function myFunction()

{

var d = new Date();

d.setFullYear(2020,10,3);

var x = document.getElementById("demo");

x.innerHTML=d;

}

</script>

<p>Remember that JavaScript counts months from 0 to 11.

Month 10 is November.</p>

</body>

</html>

测试结果:

Tue Nov 03 2020 14:47:46 GMT+0800 (中国标准时间)

toUTCString()

如何使用 toUTCString() 将当日的日期(根据 UTC)转换为字符串。

源代码:

<!DOCTYPE html>

<html>

<body>

<p id="demo">Click the button to display the UTC date and time as a string.</p>

<button onclick="myFunction()">Try it</button>

<script>

function myFunction()

{

var d = new Date();

var x = document.getElementById("demo");

x.innerHTML=d.toUTCString();

}

</script>

</body>

</html>

测试结果:

Sat, 24 Oct 2015 06:49:05 GMT

getDay()

如何使用 getDay() 和数组来显示星期，而不仅仅是数字。

源代码:

<!DOCTYPE html>

<html>

<body>

<p id="demo">Click the button to display todays day of the week.</p>

<button onclick="myFunction()">Try it</button>

<script>

function myFunction()

{

var d = new Date();

var weekday=new Array(7);

weekday[0]="Sunday";

weekday[1]="Monday";

weekday[2]="Tuesday";

weekday[3]="Wednesday";

weekday[4]="Thursday";

weekday[5]="Friday";

weekday[6]="Saturday";

var x = document.getElementById("demo");

x.innerHTML=weekday[d.getDay()];

}

</script>

</body>

</html>

测试结果:

Saturday

Display a clock

如何在网页上显示一个钟表。

源代码:

<!DOCTYPE html>

<html>

<head>

<script>

function startTime()

{

var today=new Date();

var h=today.getHours();

var m=today.getMinutes();

var s=today.getSeconds();

// add a zero in front of numbers<10

m=checkTime(m);

s=checkTime(s);

document.getElementById('txt').innerHTML=h+":"+m+":"+s;

t=setTimeout(function(){startTime()},500);

}

function checkTime(i)

{

if (i<10)

{

i="0" + i;

}

return i;

}

</script>

</head>

<body onload="startTime()">

<div id="txt"></div>

</body>

</html>