这个聊天室写的特别简易，比较适合刚开始学习js的同学借鉴，当然，写的不好，也希望诸位大神可以进行批评改正。
聊天室要求：
1.不能发空消息
2.敏感字***显示
3.图片替换 开心，尴尬
4.显示聊天内容和时间
5.每发一条信息，随机显示名称，先把一些名称定义到array里面
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title></title> <style type="text/css"> *{ box-sizing: border-box; } .left{ float: left; width: 20%; height: 650px; color: red; border: 1px solid red; border-right: 20px solid cornflowerblue; } .center{ position: relative; float: left; width: 60%; height: 650px; border: 1px solid darkcyan; } .chatList{ width: 100%; height: 500px; overflow-y: scroll; } .bottom{ position: absolute; width: 100%; height: 150px; left: 0; bottom: 0; background: skyblue; } .bottom textarea{ width: 70%; height: 100%; font-size: 18px;; vertical-align: middle; border: 1px solid red; background: blanchedalmond; } .bottom input{ width: 80px; height: 40px; margin-left: 30px; } .right{ float: right; color: #000000; border-right: 0; border-left: 20px solid cornflowerblue; } </style> </head> <body> <div> </div> <div> <div> </div> <div> <textarea ></textarea> <input type="button" value="点击发送" /> </div> </div> <div> <p>1.不能发空消息</p> <p>2.敏感字***显示</p> <p>3.图片替换 开心，尴尬</p> <p>4.显示聊天内容和时间</p> <p>5.每发一条信息，随机显示名称，先把一些名称定义到array里面</p> </div> </body> <script type="text/javascript"> // document.getElementById("chatList").scrollHeight; /* 添加敏感字替换成**---8.10 * */ function loadTime(){ var time = new Date(); var hours = (time.getHours()).toString(); if(hours.length < 2){ hours = "0" + hours; } var minutes = (time.getMinutes()).toString(); if(minutes.length < 2){ minutes = "0" + minutes; } var seconds = (time.getSeconds()).toString(); if(seconds.length < 2){ seconds = "0" + seconds; } var timeReturn = hours + ":" + minutes + ":" + seconds; document.getElementById("left").innerHTML = timeReturn; return timeReturn; } setInterval("loadTime()",1000); var chatContents = ""; var count = 0; function sendMessage(){ //通过调用randomName()函数来得到一个随机的名字 var name = randomName(); //通过调用randomColor()函数来得到一个随机的颜色 var colorR = randomColor(); //得到textarea中的内容 var content = document.getElementById("content").value; //判断输入内容是否为空 if (content == "") { alert("输入内容不能为空！！！"); return; } //通过正则表达式来获取要替换的字符串 var regExp = /藏独|台独|傻逼|你大爷/g; var regExp1 = /开心/g; var regExp2 = /尴尬/g; // var imgReplace = content.replace(regExp,"高兴"); //获取开心图片路径 var path1 = '<img src="https://www.jb51.net/img/chui.png"/>'; //获取尴尬图片的路径 var path2 = '<img src="https://www.jb51.net/img/mouse.png"/>'; //敏感字替换； content = content.replace(regExp,"***"); //将开心替换成开心图片的字符串； // txtReplace(content); var imgReplace = content.replace(regExp1,path1); // alert(imgReplace); //将尴尬替换成尴尬图片的字符串； imgReplace = imgReplace.replace(regExp2,path2); // alert(imgReplace); var chatContent = "<span>"+ name + ":" + "</span>" + " " + imgReplace; // 字符串拼接聊天记录 chatContents =chatContents + chatContent + " " + loadTime() +"<br/>"; document.getElementById("chatList").innerHTML = chatContents; //点击发送后，textarea中的内容设为空 document.getElementById("content").value = ""; var txtColor = document.getElementsByTagName("span")[count]; count++; //设置span的随机颜色 txtColor.style.color = colorR; } function randomName(){ var i = parseInt(Math.random() * (6 - 0 + 1) + 0); var arrName = new Array("果果","六六","格格","明明","小花","兰兰","花花"); return arrName[i]; } function randomColor(){ var r = parseInt(Math.random() * (255 - 0 + 1) + 0).toString(16); if(r.length < 2){ r = "0" + r; } var g = parseInt(Math.random() * (255 - 0 + 1) + 0).toString(16); if(g.length < 2){ g = "0" + g; } var b = parseInt(Math.random() * (255 - 0 + 1) + 0).toString(16); if(b.length < 2){ b = "0" + b; } return "#" + r + g + b; } </script> </html>