javascript实现倒计时（精确到秒）

时间：2021-05-26

代码相当简单实用，这里就不多废话了，小伙伴们简单看下就能明白

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http:///jquery-1.9.0.min.js"></script><script>var time_end = $('#end_time_gou').val();var time_now_server = $('#now_gou').val();countDown(time_end,time_now_server,"#demo01 .day","#demo01 .hour","#demo01 .minute","#demo01 .second");function countDown(endtime,now,day_elem,hour_elem,minute_elem,second_elem){var end_time = new Date(endtime).getTime(),//月份是实际月份-1current_time = new Date(now).getTime(),sys_second = (end_time-current_time)/1000;var timer = setInterval(function(){if (sys_second > 0) {sys_second -= 1;var day = Math.floor((sys_second / 3600) / 24);var hour = Math.floor((sys_second / 3600) % 24);var minute = Math.floor((sys_second / 60) % 60);var second = Math.floor(sys_second % 60);day_elem && $(day_elem).text(day);//计算天$(hour_elem).text(hour<10?"0"+hour:hour);//计算小时$(minute_elem).text(minute<10?"0"+minute:minute);//计算分$(second_elem).text(second<10?"0"+second:second);// 计算秒} else {clearInterval(timer);}}, 1000);}</script><script type="text/javascript">var time_now_server,time_now_client,time_end,time_server_client,timerID;time_end=new Date($('#end_time_gou').val());//结束的时间time_end=time_end.getTime();time_now_server=new Date($('#now_gou').val());//开始的时间,服务器time_now_server= time_now_server.getTime();time_now_client=new Date();time_now_client=time_now_client.getTime();//本地的时间time_server_client=time_now_server-time_now_client;setTimeout("show_time("+time_end+","+time_server_client+","+timerID+")",1000);function show_time(time_end,time_server_client,timerID){var timer = document.getElementById('timer');if(!timer){return;}timer.innerHTML = timer.innerHTML;var time_now,time_distance,str_time;var int_day,int_hour,int_minute,int_second;var time_now=new Date();time_now=time_now.getTime()+time_server_client;time_distance=time_end-time_now;if(time_distance>0){int_day=Math.floor(time_distance/86400000)time_distance-=int_day*86400000;int_hour=Math.floor(time_distance/3600000)time_distance-=int_hour*3600000;int_minute=Math.floor(time_distance/60000)time_distance-=int_minute*60000;int_second=Math.floor(time_distance/1000)if(int_hour<10)int_hour="0"+int_hour;if(int_minute<10)int_minute="0"+int_minute;if(int_second<10)int_second="0"+int_second;str_time=int_day+"天"+int_hour+"小时"+int_minute+"分钟"+int_second+"秒";timer.innerHTML=str_time;setTimeout("show_time("+time_end+","+time_server_client+","+timerID+")",1000);}else{timer.innerHTML =timer.innerHTML;clearTimeout(timerID)}}</script></body></html>

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