本文实例为大家分享了JavaScript实现随机点名器的具体代码，供大家参考，具体内容如下

HTML代码：

点名啦

CSS代码：

* {

margin: 0px;

padding: 0px;

}

body {

background-color: rgb(255, 249, 249);

}

h1 {

text-align: center;

padding-top: 100px;

color: rgba(250, 54, 129, 0.562);

}

#did {

position: relative;

width: 200px;

margin: 60px auto;

}

#did input:first-child {

width: 200px;

height: 60px;

background-color: rgba(250, 54, 129, 0.562);

/* 不要边框或设边框为透明 */

border: none;

border-radius: 20px;

font-size: 25px;

color: #fff;

box-shadow: 0px 0px 3px 3px rgba(250, 54, 129, 0.158);

/* 点击时边框消失 */

outline: 0;

}

#did input:nth-last-child(1) {

width: 100px;

height: 40px;

margin: 40px 50px;

background-color: rgba(250, 54, 129, 0.562);

border: 1px solid transparent;

background-color: rgba(255, 68, 177, 0.432);

border-radius: 15px;

box-shadow: 0px 0px 2px 2px rgba(250, 54, 129, 0.158);

font-size: 17px;

color: #333;

outline: 0;

transition: color 0.2s ease-out;

transition: box-shadow 0.2s ease-out;

}

#did input:nth-last-child(1):hover {

color: #fff;

cursor: pointer;

box-shadow: 0px 0px 4px 4px rgba(250, 54, 129, 0.158);

}

JavaScript代码：

var rollcall = document.getElementById("rollcall-id");

var action = document.getElementById("action-id");

var h1 = document.getElementsByTagName("h1");

//不能用name,用name只会取得一个字符

var allName = ["张柳菲", "高颖影", "赵温言", "李颖", "邓辰希", "莫若邻", "秦橙",

"吴筱宇", "赵希", "马素滢", "吕沁雅", "罗鸿哲", "夏素芸", "谢焱之",

"曹梦朦", "李允书", "周枫桥", "孙浩", "江雁菁", "杨振凯", "林舒言",

"钱妙妙", "郭景", "杜贝贝", "童闵然", "钟小凌", "韩云韵", "白然之"];

//随机产生一个名字

function stringRandom() {

return parseInt(Math.random() * allName.length);

}

var time = null;

var luckName;

//开始

function doStart() {

if (time == null) {

time = setInterval(function () {

//获取随机点名的值

luckName = allName[stringRandom()];

rollcall.setAttribute("value", luckName);

}, 100);

}

}

//停止

function doStop() {

if (time != null) {

clearInterval(time);

time = null;

}

}

//点击事件

function doClick() {

if (action.value == "开始") {

//改变样式

action.style.backgroundColor = "#cecece";

action.style.boxShadow = "0px 0px 2px 2px rgba(100, 100, 100, 0.4)";

action.value = "停止";

h1[0].innerHTML = "点名啦";

//开始随机点名

doStart();

} else if (action.value == "停止") {

action.style.backgroundColor = "rgba(255, 68, 177, 0.432)";

action.style.boxShadow = "0px 0px 2px 2px rgba(250, 54, 129, 0.158)";

action.value = "开始";

h1[0].innerHTML = "恭喜" + luckName + "同学获得一次发言机会";

//停止

doStop();

}

}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。