How to implement counter and clock function code in html-HTML Tutorial-php.cn

How to implement counter and clock function code in html

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Release： 2018-08-30 11:29:51

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The content of this article is about how to implement the function code of counter and clock in HTML. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

In many web pages, we will see counters and clocks, so how can we implement this function ourselves?

Let’s talk about the counter first. The logical function of the counter is very simple, that is, the second hand increments by one every second, and it advances by one every time it reaches 60. The code is as follows:

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8" />
        <title></title>
    </head>
    <body>
        <div></div>
        <script>
            var index = 0;
            var i=0;
            
            /**
             * 对时间进行预先处理，逢60进一
             */
            function counter(){
                second = index;
                minute=i;
                index++;
                if(second==60){
                    second=0;
                    i++;
                    index=0;
                }
                if(second<10){
                    second = "0"+second;
                }
                if(minute<10){
                    minute="0"+minute;
                }
                return time = minute +":"+second;
            }
            
            /**
             * 将获得的时间插入到div的区域
             */
            function show(){
                var time = counter();
                document.getElementsByTagName("div")[0].innerHTML=time;
            }
            
            /**
             * 每秒钟获得一次时间，实现计数功能
             */
            function set(){
                setInterval("show()",1000);
            }
            
            show();
            set();
        </script>
    </body>
</html>

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In this way, a simple counter is completed.

Code for clock function:

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title></title>
        <script>
            /**
             * 向Date类中添加获取当前时间的方法
             */
            Date.prototype.currentTime = function(){
                var year = this.getFullYear();
                var month = this.getMonth()+1;
                var day = this.getDate();
                var week = this.getDay();
                week = "星期"+"日一二三四五六".charAt(week);
                month = month<10 ? "0"+month : month;
                day = day < 10 ? "0"+day : day;
                var hour = this.getHours();
                var second = this.getSeconds();
                var minute = this.getMinutes();
                hour = hour<10 ? "0"+hour : hour;
                second = second < 10 ? "0"+second : second;
                minute = minute < 10 ? "0"+minute : minute;
                return year+"-"+month+"-"+day+" "+week+" "+hour+":"+minute+":"+second;
            }
            
            function showTime(){
                var time = new Date().currentTime();
                document.getElementById("show").innerHTML = time;
            }
            
            function setTime(){
                showTime();
                setInterval("showTime()",1000);
            }
            window.onload = function(){
                setTime();
            }
            
        </script>
    </head>
    <body>
        <span id="show"></span>
        
    </body>
</html>

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In this way, the clock is complete!

Related recommendations:

How to use a timer to implement the countdown function in js

The clock effect implemented by jQuery css (compatible with all browser)_jquery

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