本文實(shí)例為大家分享了js實(shí)現(xiàn)抽獎(jiǎng)系統(tǒng)功能的具體代碼,供大家參考,具體內(nèi)容如下
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要求實(shí)現(xiàn)功能:
1.點(diǎn)擊左側(cè)按鍵,開始抽獎(jiǎng),點(diǎn)擊右側(cè)按鍵,停止抽獎(jiǎng);
2.敲擊回車鍵,開始抽獎(jiǎng),再次敲擊回車鍵,停止抽獎(jiǎng);
3.開始抽獎(jiǎng)后,左側(cè)按鈕變色;
html:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>抽獎(jiǎng)</title> <link rel="stylesheet" href="style.css"> <script src="eventUtil.js"></script> <script src="js.js"></script> </head> <body> <div class="box"> <div id="header">開始抽獎(jiǎng)啦!</div> <div id="btn"> <span id="start">開始</span> <span id="stop">結(jié)束</span> </div> </div> </body> </html>
css:
body{ margin: 0; padding: 0; } .box{ width: 400px; height: 200px; border: 1px solid #0C4E7C; margin: 0 auto; } #header{ color:darkred; font-size: 24px; text-align: center; width: 400px; height: 60px; line-height: 60px; } #btn{ width: 200px; overflow: hidden; margin: 30px auto 0; } #btn span{ cursor: pointer; border: 2px solid #a09a09; border-radius: 7px; margin-right: 10px; color: #000; display: inline-block; height: 40px; width: 80px; background-color: #f2ec55; line-height: 40px; text-align: center; }
JavaScript:
js.js: var date = ["謝謝參與", "謝謝參與", "謝謝參與", "50元話費(fèi)", "ipad", "佳能相機(jī)", "蘋果手機(jī)", "3DS", "switch", "1000元超市購(gòu)物卡"]; var timer = null; var flag = 0; window.onload = function () { // var header = document.getElementById("header");優(yōu)化前 var start = document.getElementById("start"); var stop = document.getElementById("stop"); //鼠標(biāo)抽獎(jiǎng) eventUtil.addHandler(start, "click", getStart); eventUtil.addHandler(stop, "click", getStop); //鍵盤抽獎(jiǎng); document.onkeyup = function (event) { var e = event || window.event; //檢測(cè)按鍵鍵值; // console.log(e.keyCode); if (e.keyCode === 13) { if (flag === 0) { getStart(); flag = 1; } else { getStop(); flag = 0; } } }; function getStart() { clearInterval(timer); var header = document.getElementById("header");//優(yōu)化后 timer = setInterval(function () { //代碼優(yōu)化前 //var x = parseInt(Math.random()*10); var random = Math.floor(Math.random() * date.length); header.innerHTML = date[random]; }, 50); start.style.backgroundColor = "#999"; flag = 1; } function getStop() { clearInterval(timer); start.style.backgroundColor = "#f2ec55"; flag = 0; } };
eventUtil.js
var eventUtil = { getEvent:function (event) { return event?event:window.event; }, getType: function (event) { return event.type; }, getTarget:function (event) { return event.target||event.srcElement; }, //阻止冒泡 stopPropagation:function (event) { if(event.stopPropagation){ event.stopPropagation(); }else { event.cancelBubble=true; } }, //阻止事件默認(rèn)行為; preventDefault:function(event){ if(event.preventDefault){ event.preventDefault(); }else { event.returnValue = false; } }, //添加具柄; addHandler: function (element, type, Handler) { if (element.ç) { element.addEventListener(type, Handler, false); } else if (element.attachEvent) { element.attachEvent("on" + type, Handler); } else { element["on" + type] = Handler; } }, //刪除具柄; removeHandler: function (element, type, Handler) { if (element.removeEventListener) { element.removeEventListener(type, Handler, false); } else if (element.detachEvent) { element.detachEvent("on" + type, Handler); } else { element["on" + type] = null; } } };
以上就是本文的全部?jī)?nèi)容,希望對(duì)大家的學(xué)習(xí)有所幫助,也希望大家多多支持創(chuàng)新互聯(lián)。
文章名稱:慕課網(wǎng)題目之js實(shí)現(xiàn)抽獎(jiǎng)系統(tǒng)功能
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