用JS实现一个随机点名系统,供大家参考,具体内容如下
每次上课前10分钟,老师都会叫我们回答问题,奈何每次都是点学号,好像每次我都能中奖,我直接跟老师提议,老师,我用来JS来帮你写个随机点名的系统吧!这样就不会每次都抽到我了,哈哈
先看效果:
代码如下:
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<!DOCTYPE html> < html lang = "en" > < head > < meta charset = "UTF-8" > < meta http-equiv = "X-UA-Compatible" content = "IE=edge" > < meta name = "viewport" content = "width=device-width, initial-scale=1.0" > < title >Document</ title > </ head > < body > < button id = "box1" >开始</ button > < button id = "box2" >结束</ button > < span id = "box" >Tom</ span > < script > //获取页面中的元素 var btn1 = document.getElementById('box1'); var btn2 = document.getElementById('box2'); var span = document.getElementById('box'); var names = ['Tom', 'Jack', 'Lucy', 'Peter', 'Mark', 'Min', 'Liu', 'Rani']; var timer; btn1.onclick = function() { window.clearInterval(timer); timer = window.setInterval(countName, 100); }; btn2.onclick = function() { window.clearInterval(timer); }; function countName() { var index = parseInt(Math.random() * names.length); span.innerHTML = names[index]; } </ script > </ body > </ html > |
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服务器之家。
原文链接:https://blog.csdn.net/m0_46374969/article/details/115343312