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实战练习–聊天室
下面是一个使用原生JS实现简单的聊天室练习,加入了用户名功能和几个表情包
这个是html页面代码就不多说了,看下面
<body><div id="app"><div class="username-wrap save-user"><input type="text" placeholder="请输入用户名" class="username-input" /><button class="submit-btn">确定</button></div><div class="username-wrap update-user"><span>用户名: <span class="username"></span></span><button class="submit-btn update-btn">修改</button></div><div class="room-container"><div class="room-header"><h1>聊天室</h1></div><div class="room-body"></div><div class="room-footer"><textarea class="text" placeholder="请输入文字"></textarea><button class="btn" disabled>发送</button></div></div></div><div class="emoji-list"></div><script src="./js/index.js"></script></body>
JS的功能代码,逻辑很复杂代码很清晰
window.onload = function () {let username = "";function handleUsername() {// 1. 用户名功能// 1.1. 点击确定，保存用户名const submitBtnEl = document.querySelector(".submit-btn");const updateBtnEl = document.querySelector(".update-btn");const usernameInputEl = document.querySelector(".username-input");const saveUserEl = document.querySelector(".save-user");const updateUserEl = document.querySelector(".update-user");const usernameEl = document.querySelector(".username");submitBtnEl.onclick = function () {const name = usernameInputEl.value.trim();if (!name) {alert("请输入用户名");return;}username = name;updateUserEl.style.display = "block";saveUserEl.style.display = "none";usernameEl.innerText = name;};// 1.2. 点击修改，修改用户名updateBtnEl.onclick = function () {updateUserEl.style.display = "none";saveUserEl.style.display = "block";};}handleUsername();function handleChat() {// 2. 连接上WebSocket服务器// 通过ipconfig可以查询ip：192.168.33.35const ws = new WebSocket("ws://127.0.0.1:4000");// 3. 发送消息const textareaEl = document.querySelector(".text");const btnEl = document.querySelector(".btn");const roomBodyEl = document.querySelector(".room-body");// 给按钮禁用效果textareaEl.oninput = function (e) {const value = this.value.trim();if (value) {btnEl.disabled = false;} else {btnEl.disabled = true;}};btnEl.onclick = function () {if (!username) {alert("请输入用户名");return;}/*消息：{username: 用户名,content: 消息内容,time: '2023-5-16 16:25:01'}*/const time = getTime();const content = textareaEl.value.trim();ws.send(JSON.stringify({username,content,time,}));// 清空消息内容textareaEl.value = "";// 按钮禁用btnEl.disabled = true;// 将消息内容追加到room-body中roomBodyEl.innerHTML += `<div class="message-item my"><p class="message-header">我 ${time}</p><div class="message-content-wrap"><span class="message-content">${content}</span></div></div>`;// 滚动条到最下roomBodyEl.scrollTop = roomBodyEl.scrollHeight;};function getTime() {const date = new Date();const Y = date.getFullYear();const M = date.getMonth() + 1;const D = date.getDate();// 时分秒要补零let h = date.getHours();h = h >= 10 ? h : "0" + h;let m = date.getMinutes();m = m >= 10 ? m : "0" + m;let s = date.getSeconds();s = s >= 10 ? s : "0" + s;return `${Y}-${M}-${D} ${h}:${m}:${s}`;}// 4. 接受消息ws.onmessage = function (e) {const data = JSON.parse(e.data);// 过滤掉自己发送的消息if (data.username === username) {return;}roomBodyEl.innerHTML += `<div class="message-item"><p class="message-header">${data.username} ${data.time}</p><span class="message-content">${data.content}</span></div>`;// 滚动条到最下roomBodyEl.scrollTop = roomBodyEl.scrollHeight;};}handleChat();// 表情包功能const emojiArr = ["😀", "😁", "😂", "😃", "😄"];const emojiListEl = document.querySelector(".emoji-list");let htmlStr = "";emojiArr.forEach((emoji) => {htmlStr += `<span>${emoji}</span>`;});emojiListEl.innerHTML = htmlStr;// const emojiItemsEl = document.querySelectorAll(".emoji-list span");const textareaEl = document.querySelector(".text");// emojiItemsEl.forEach((emoji) => {// emoji.onclick = function () {// const emoji = this.innerText;// textareaEl.value += emoji;// };// });// 使用事件委托emojiListEl.onclick = function (e) {textareaEl.value += e.target.innerText;};
};
服务器代码接受数据
const { WebSocketServer } = require("ws");const wss = new WebSocketServer({ port: 4000 });wss.on("connection", (ws) => {// 接受客户端的消息ws.on("message", (data) => {// 将客户端消息转发给所有客户端console.log(data.toString());wss.clients.forEach((ws) => {ws.send(data.toString());});});
});随便写点样式功能实现
