zoukankan      html  css  js  c++  java
  • 吴裕雄--天生自然 JAVASCRIPT开发学习:Date(日期) 对象

    <!DOCTYPE html>
    <html>
    <head>
    <meta charset="utf-8">
    <title>菜鸟教程(runoob.com)</title>
    </head>
    <body>
    
    <script>
    var d=new Date();
    document.write(d);
    </script>
    
    </body>
    </html>

    <!DOCTYPE html>
    <html>
    <head>
    <meta charset="utf-8">
    <title>菜鸟教程(runoob.com)</title>
    </head>
    <body>
    
    <p id="demo">点击按钮获取今年的年份。</p>
    <button onclick="myFunction()">点我</button>
    <script>
    function myFunction(){
        var d = new Date();
        var x = document.getElementById("demo");
        x.innerHTML=d.getFullYear();
    }
    </script>
    
    </body>
    </html>

    <!DOCTYPE html>
    <html>
    <head>
    <meta charset="utf-8">
    <title>菜鸟教程(runoob.com)</title>
    </head>
    <body>
    
    <p id="demo">单击按钮显示1970年1月1号至今的毫秒数。</p>
    <button onclick="myFunction()">点我</button>
    <script>
    function myFunction(){
        var d = new Date();
        var x = document.getElementById("demo");
        x.innerHTML=d.getTime();
    }
    </script>
    
    </body>
    </html>

    <!DOCTYPE html>
    <html>
    <head>
    <meta charset="utf-8">
    <title>菜鸟教程(runoob.com)</title>
    </head>
    <body>
    
    <p id="demo">单击按钮显示修改后的年月日。</p>
    <button onclick="myFunction()">点我</button>
    <script>
    function myFunction(){
        var d = new Date();
        d.setFullYear(2020,10,3);
        var x = document.getElementById("demo");
        x.innerHTML=d;
    }
    </script>
    <p>记住 JavaScript 月数是从0至11。10是11月。</p>
    </body>
    </html>

    <!DOCTYPE html>
    <html>
    <head>
    <meta charset="utf-8">
    <title>菜鸟教程(runoob.com)</title>
    </head>
    <body>
    
    <p id="demo">点击按钮把 utc 日期和时间转换成字符串。</p>
    <button onclick="myFunction()">点我</button>
    <script>
    function myFunction(){
        var d = new Date();
        var x = document.getElementById("demo");
        x.innerHTML=d.toUTCString();
    }
    </script>
    
    </body>
    </html>

    <!DOCTYPE html>
    <html>
    <head>
    <meta charset="utf-8">
    <title>菜鸟教程(runoob.com)</title>
    </head>
    <body>
    
    <p id="demo">单击按钮显示今天周几</p>
    <button onclick="myFunction()">点我</button>
    <script>
    function myFunction(){
        var d = new Date();
        var weekday=new Array(7);
        weekday[0]="周日";
        weekday[1]="周一";
        weekday[2]="周二";
        weekday[3]="周三";
        weekday[4]="周四";
        weekday[5]="周五";
        weekday[6]="周六";
        var x = document.getElementById("demo");
        x.innerHTML=weekday[d.getDay()];
    }
    </script>
    
    </body>
    </html>

    <!DOCTYPE html>
    <html>
    <head>
    <meta charset="utf-8">
    <title>菜鸟教程(runoob.com)</title>
    <script>
    function startTime(){
        var today=new Date();
        var h=today.getHours();
        var m=today.getMinutes();
        var s=today.getSeconds();// 在小于10的数字前加一个‘0’
        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>

    var x=new Date();
    x.setFullYear(2100,0,14);
    var today = new Date();
    
    if (x>today)
    {
        alert("今天是2100年1月14日之前");
    }
    else
    {
        alert("今天是2100年1月14日之后");
    }
  • 相关阅读:
    SVN服务的配置与管理
    SVN配置多仓库与权限控制
    SVN使用详解
    这个问题他又来了,如何学编程!
    乘风破浪的程序员们
    Java 学习路线(史上最全 2020 版 ~ 持续更新中)
    P4782 【模板】2-SAT 问题
    HDU
    2020.8.3
    Interesting Computer Game
  • 原文地址:https://www.cnblogs.com/tszr/p/10944672.html
Copyright © 2011-2022 走看看