weibo发布案例
架构如下：
weibo.css
* {
margin: 0;
padding: 0;
}
ul {
list-style: none;
}
.w {
width: 900px;
margin: 0 auto;
}
.controls textarea {
width: 878px;
height: 100px;
resize: none;
border-radius: 10px;
outline: none;
padding-left: 20px;
padding-top: 10px;
font-size: 18px;
}
.controls {
overflow: hidden;
}
.controls div {
float: right;
}
.controls div span {
color: #666;
}
.controls div .useCount {
color: red;
}
.controls div button {
width: 100px;
outline: none;
border: none;
background: rgb(252, 251, 251);
height: 30px;
cursor: pointer;
color: #fff;
font: bold 14px '宋体';
transition: all 0.5s;
}
.controls div button:hover {
background: rgb(0, 225, 255);
}
.controls div button:disabled {
background: rgba(0, 225, 255, 0.5);
}
.contentList {
margin-top: 50px;
}
.contentList li {
padding: 20px 0;
border-bottom: 1px dashed #ccc;
position: relative;
}
.contentList li .info {
position: relative;
}
.contentList li .info span {
position: absolute;
top: 15px;
left: 100px;
font: bold 16px '宋体';
}
.contentList li .info p {
position: absolute;
top: 40px;
left: 100px;
color: #aaa;
font-size: 12px;
}
.contentList img {
width: 80px;
border-radius: 50%;
}
.contentList li .content {
padding-left: 100px;
color: #666;
word-break: break-all;
}
.contentList li .the_del {
position: absolute;
right: 0;
top: 0;
font-size: 28px;
cursor: pointer;
}
@media (max-width: 920px) {
.w {
width: 95%;
padding: 0 15px;
}
.controls textarea {
width: calc(100% - 40px);
}
}
/* 微博项悬停效果 */
.contentList li:hover {
background-color: #f9f9f9;
transform: translateY(-2px);
transition: all 0.3s ease;
}
/* 发布按钮悬停效果增强 */
.controls div button:hover {
background: rgb(0, 195, 255);
transform: scale(1.05);
}
/* 删除按钮样式增强 */
.contentList li .the_del:hover {
color: #ff3333;
transform: scale(1.2);
}
/* 微博内容换行 */
.contentList li .content {
line-height: 1.6;
font-size: 16px;
margin-top: 10px;
}
/* 用户信息样式优化 */
.contentList li .info span {
color: #333;
font-weight: bold;
}
.contentList li .info p {
color: #666;
}
body {
background-color: #f5f8fa;
font-family: 'Microsoft YaHei', Arial, sans-serif;
line-height: 1.5;
}
.w {
background: white;
border-radius: 10px;
padding: 25px;
box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}
.contentList li {
border: 1px solid #e6ecf0;
border-radius: 10px;
padding: 18px;
margin-bottom: 15px;
background: #fafafa;
}
.contentList img {
border-radius: 50%;
border: 2px solid #1da1f2;
}
.contentList li .info span {
color: #333;
font-size: 16px;
font-weight: bold;
}
.controls div button {
border-radius: 18px;
font-weight: bold;
}
.controls textarea {
border: 2px solid #ccd6dd;
border-radius: 8px;
padding: 12px;
}
.controls textarea:focus {
border-color: #1da1f2;
outline: none;
}
weibo.js
// 日期格式化函数 - 保留原有
function getTime() {
var date = new Date();
var year = date.getFullYear();
var month = date.getMonth() + 1;
month = month < 10 ? '0' + month : month;
var day = date.getDate();
day = day < 10 ? '0' + day : day;
var hours = date.getHours();
hours = hours < 10 ? '0' + hours : hours;
var minutes = date.getMinutes();
minutes = minutes < 10 ? '0' + minutes : minutes;
var seconds = date.getSeconds();
seconds = seconds < 10 ? '0' + seconds : seconds;
var str = year + '-' + month + '-' + day + ' ' + hours + ':' + minutes + ':' + seconds;
return str;
}
// 1. 获取元素
var area = document.querySelector('#area');
var send = document.querySelector('#send');
var useCount = document.querySelector('.useCount');
var ul = document.querySelector('ul');
// 用户数据数组 - 确保这个存在
var dataArr = [
{ uname: '司马懿', imgSrc: './images/9.5/01.jpg' },
{ uname: '女娲', imgSrc: './images/9.5/02.jpg' },
{ uname: '百里守约', imgSrc: './images/9.5/03.jpg' },
{ uname: '亚瑟', imgSrc: './images/9.5/04.jpg' },
{ uname: '虞姬', imgSrc: './images/9.5/05.jpg' },
{ uname: '张良', imgSrc: './images/9.5/06.jpg' },
{ uname: '安其拉', imgSrc: './images/9.5/07.jpg' },
{ uname: '李白', imgSrc: './images/9.5/08.jpg' },
{ uname: '阿珂', imgSrc: './images/9.5/09.jpg' },
{ uname: '墨子', imgSrc: './images/9.5/10.jpg' },
{ uname: '鲁班', imgSrc: './images/9.5/11.jpg' },
{ uname: '嬴政', imgSrc: './images/9.5/12.jpg' },
{ uname: '孙膑', imgSrc: './images/9.5/13.jpg' },
{ uname: '周瑜', imgSrc: './images/9.5/14.jpg' },
{ uname: '老夫子', imgSrc: './images/9.5/15.jpg' },
{ uname: '狄仁杰', imgSrc: './images/9.5/16.jpg' },
{ uname: '扁鹊', imgSrc: './images/9.5/17.jpg' },
{ uname: '马可波罗', imgSrc: './images/9.5/18.jpg' },
{ uname: '露娜', imgSrc: './images/9.5/19.jpg' },
{ uname: '孙悟空', imgSrc: './images/9.5/20.jpg' },
{ uname: '黄忠', imgSrc: './images/9.5/21.jpg' },
{ uname: '百里玄策', imgSrc: './images/9.5/22.jpg' }
];
// 2. 功能1：文本域输入的过程中统计内容的个数给span
area.oninput = function () {
var count = this.value.length;
useCount.innerText = count;
// 添加字数限制提示
if (count > 200) {
useCount.style.color = 'red';
send.disabled = true;
} else {
useCount.style.color = '#666';
send.disabled = false;
}
};
// 3. 功能2：点击发布按钮创建li追加到ul中
send.onclick = function () {
var v = area.value.trim();
// 3.3 检测内容的长度是否等于0，若等于0，提示不能为空
if (v.length == 0) {
alert('内容不能为空！');
return;
}
// 检查字数是否超过限制
if (v.length > 200) {
alert('内容不能超过200字！');
return;
}
// 随机选择一个用户
var randomIndex = Math.floor(Math.random() * dataArr.length);
var randomUser = dataArr[randomIndex];
// 3.4 创建li插入到ul中最前面
var newLi = document.createElement('li');
ul.insertBefore(newLi, ul.children[0]);
// 3.5 创建一个类名为info的div，追加到li中
var info = document.createElement('div');
info.className = 'info';
newLi.appendChild(info);
// 3.5.1 创建一个img元素，追加到类名为info的div中
var img = document.createElement('img');
info.appendChild(img);
// 3.5.2 设置img的src - 使用随机用户头像
img.src = randomUser.imgSrc;
img.alt = randomUser.uname;
// 3.5.3 创建一个span元素，追加到类名为info的div中
var span = document.createElement('span');
info.appendChild(span);
// 3.5.4 设置span的内容 - 使用随机用户名
span.innerText = randomUser.uname;
// 3.5.5 创建一个p元素，追加到类名为info的div中
var p = document.createElement('p');
info.appendChild(p);
// 3.5.6 把当前时间设置给p元素
p.innerText = '发布于：' + getTime();
// 3.6 创建一个类名为content的div,追加到li中
var content = document.createElement('div');
content.className = 'content';
newLi.appendChild(content);
// 3.7 设置类名为content的div的innerText为文本域的内容
content.innerText = v;
// 3.8 添加删除按钮
var delBtn = document.createElement('span');
delBtn.className = 'the_del';
delBtn.innerHTML = '×';
delBtn.title = '删除此微博';
newLi.appendChild(delBtn);
// 3.9 发布成功后，清空文本域，数量重置为0
area.value = '';
useCount.innerText = '0';
useCount.style.color = '#666';
// 添加删除功能
delBtn.addEventListener('click', function() {
if (confirm('确定要删除这条微博吗？')) {
newLi.style.opacity = '0';
newLi.style.transform = 'translateX(100px)';
setTimeout(function() {
ul.removeChild(newLi);
}, 300);
}
});
};
// 4. 添加快捷键支持：Ctrl+Enter 发布
area.addEventListener('keydown', function(e) {
if (e.ctrlKey && e.key === 'Enter') {
if (!send.disabled) {
send.click();
}
}
});
// 5. 初始化：为页面加载时显示的微博添加删除功能
// 如果你有初始微博，可以在这里添加删除功能
// 6. 添加一些初始示例微博（可选）
window.onload = function() {
// 如果有需要，可以在这里添加一些示例微博
console.log('微博系统已加载完成！');
};
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<link rel="stylesheet" href="css/weibo.css">
</head>
<body>
<div class="w">
<div class="controls">
<img src="images/tip.png" alt=""><br>
<textarea placeholder="说点什么吧..." id="area" cols="30" rows="10" maxlength="200"></textarea>
<div>
<span class="useCount">0</span>
<span>/</span>
<span>200</span>
<button id="send">发布</button>
</div>
</div>
<div class="contentList">
<ul>
</ul>
</div>
</div>
<script>
let dataArr = [
{ uname: '司马懿', imgSrc: './images/9.5/01.jpg' },
{ uname: '女娲', imgSrc: './images/9.5/02.jpg' },
{ uname: '百里守约', imgSrc: './images/9.5/03.jpg' },
{ uname: '亚瑟', imgSrc: './images/9.5/04.jpg' },
{ uname: '虞姬', imgSrc: './images/9.5/05.jpg' },
{ uname: '张良', imgSrc: './images/9.5/06.jpg' },
{ uname: '安其拉', imgSrc: './images/9.5/07.jpg' },
{ uname: '李白', imgSrc: './images/9.5/08.jpg' },
{ uname: '阿珂', imgSrc: './images/9.5/09.jpg' },
{ uname: '墨子', imgSrc: './images/9.5/10.jpg' },
{ uname: '鲁班', imgSrc: './images/9.5/11.jpg' },
{ uname: '嬴政', imgSrc: './images/9.5/12.jpg' },
{ uname: '孙膑', imgSrc: './images/9.5/13.jpg' },
{ uname: '周瑜', imgSrc: './images/9.5/14.jpg' },
{ uname: '老夫子', imgSrc: './images/9.5/15.jpg' },
{ uname: '狄仁杰', imgSrc: './images/9.5/16.jpg' },
{ uname: '扁鹊', imgSrc: './images/9.5/17.jpg' },
{ uname: '马可波罗', imgSrc: './images/9.5/18.jpg' },
{ uname: '露娜', imgSrc: './images/9.5/19.jpg' },
{ uname: '孙悟空', imgSrc: './images/9.5/20.jpg' },
{ uname: '黄忠', imgSrc: './images/9.5/21.jpg' },
{ uname: '百里玄策', imgSrc: './images/9.5/22.jpg' },
]
// 1、元素对象的获取
let textarea =document.querySelector("textarea")
let useCount = document.querySelector(".useCount")
let send = document.querySelector("#send")
let ul = document.querySelector(".contentList ul")
textarea.addEventListener("input",function(){
// alert(666)
useCount.innerHTML = textarea.value.length
})
// 点击按钮，发送li
send.addEventListener("click",function(){
if (textarea.value.trim()===""){
textarea.value=""
useCount.innerHTML=0
return alert("内容不能为空")
}
function getRandom(min,max){
return Math.floor(Math.random() * (max - min + 1)) + min
}
let random = getRandom(0,dataArr.length-1)
// 创建新的li
let newLI = document.createElement("li")
// li里面添加内容
newLI.innerHTML=`
<div class="info">
<img class="userpic" src=${dataArr[random].imgSrc}>
<span class="username"> ${dataArr[random].uname}</span>
<p class="send-time">${new Date().toLocaleString()}</p>
</p>
</div>
<div>${textarea.value.trim()}</div>
<span class="the_del">X</span>
`
// 追加
// ul.appendChild(newLI)
ul.insertBefore(newLI,ul.children[0])
textarea.value=""
useCount.innerHTML=0
// 删除留言
let del = document.querySelector(".the_del")
del.addEventListener("click",function(){
ul.removeChild(newLI)
})
// let dels = document.querySelectorAll(".the_del")
// console.log(dels)
// for(let i of dels){
// console.log(i)
// i.addEventListener("click",function(){
// ul.removeChild(i.parentNode)
// })
// }
})
// 快捷键的设置
textarea.addEventListener("keydown",function(e){
e.preventDefault()
if (e.code==="Enter"){
send.click()
}
})
// JS代码的执行机制
</script>
</body>
</html>
实现页面：