利用html5，css實現鐘擺效果
知識點：1） 利用position/left/top和calc()實現元素的水平和垂直居中；
2） 利用CSS3的animation/transform/transform-origin屬性定義動畫；
3） 利用transform-origin實現旋轉原點的圓心調整
廢話不多說了，直接看代碼吧，具體代碼如下所示：
<!DOCTYPE html><html><head> <meta charset=UTF-8> <title></title> <style> li{ list-style:none; } #box{ width: 400px; height: 400px; position : absolute; top:calc(50% - 200px); left:calc(50% - 200px); border: 2px solid palegoldenrod; } #dial{ width: 200px; height: 200px; position: absolute; top:calc(50 % - 100px); left:calc(50% - 100px); border: 2px solid cyan; border-radius: 50%; } .scaleIndex{ width: 4px; height: 12px; position: absolute; top: 0; left: calc(50% - 2px); background-color: gray; transform-origin: 2px 100px; } .angle30{transform : rotate(30deg);} .angle60{transform : rotate(60deg);} .angle90{transform : rotate (90deg);} .angle120{transform : rotate(120deg);} .angle150{transform : rotate(150deg);} .angle180{transform : rotate(180deg);} .angle210{transform : rotate(210deg);} . angle240{transform : rotate(240deg);} .angle270{transform : rotate(270deg);} .angle300{transform : rotate(300deg);} .angle330{transform : rotate(330deg);} #fixPoint{ width: 10px; height: 10px; position: absolute; top:calc(50% - 5px); left:calc(50% - 5px); background-color: cadetblue; border-radius: 50%; } #hourHand{ width: 6px; height : 70px; position:absolute; top: 40px; left: calc(50% - 3px); background-color: darkblue; transform-origin: 50% 60px; } #minuteHand{ width: 4px; height: 75px; position:absolute ; top: 35px; left: calc(50% - 2px); background-color: yellow; transform-origin: 50% 65px; } #secondHand{ width: 2px; height: 90px; position:absolute; top: 20px; left : calc(50% - 1px); background-color: red; transform-origin: 50% 80px; } </style></head><body> <div id = box> <div id = 'dial'> < ul id = scale> <li class = scaleIndex></li> <li class = scaleIndex angle30></li> <li class = scaleIndex angle60></li> <li class = scaleIndex angle90></li> <li class = scaleIndex angle120></li> <li class = scaleIndex angle150></li> <li class = scaleIndex angle180></li> <li class = scaleIndex angle210></li> <li class = scaleIndex angle240>< /li> <li class = scaleIndex angle270></li> <li class = scaleIndex angle300></li> <li class = scaleIndex angle330></li> </ul> <div id = fixPoint></div> <div id = hourHand></div> <div id = minuteHand></div> <div id = secondHand></div> </div> </div><script type = 'text/javascript' src = ' js/jquery-3.2.1.js'></script><script type = text/javascript>window.onload = function(){ var hourHand = document.getElementById('hourHand'); var minuteHand = document.getElementById( 'minuteHand'); var secondHand = document.getElementById('secondHand');setInterval(function(){ var currentTime = new Date(); var hourValue = currentTime.getHours(); var hourAngle = hourValue / 24 * 360 + ' deg'; var minuteValue = currentTime.getMinutes(); var minuteAngle = minuteValue / 60 * 360 + 'deg'; var secondValue = currentTime.getSeconds(); var secondAngle = secondValue / 60 * 360 + 'deg'; console.log (hourAngle);// 方法一：利用jquery的css()增加屬性var cmdHour = 'rotate('+ hourAngle +')';$('#hourHand').css({transform:'rotate('+ hourAngle +')'});var cmdMinute = 'rotate('+ minuteAngle +')';$('#minuteHand').css({transform:cmdMinute});var cmdSecond = 'rotate('+ secondAngle +') ';$('#secondHand').css({transform:cmdSecond});// 方法二：利用DOM元素的style屬性設置// hourHand.style.transform = 'rotate('+ hourAngle + ')'; // minuteHand.style.transform = 'rotate('+ minuteAngle + ')';// secondHand.style.transform = 'rotate('+ secondAngle + ')'; },1000);} </script></ body></html>總結以上所述是小編給大家介紹的基於HTML5+CSS3實現簡單的時鐘效果，希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會及時回復大家的。在此也非常感謝大家對VeVb武林網網站的支持！